'93 JGC 318 Engine Ping Problem
11-13-2005, 11:26 AM
#1
Guest
Posts: n/a
'93 JGC 318 Engine Ping Problem
I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
with detonation on hills. Using 87 octane gas, and driving at
altitudes over 5,000 feet. Other than the timing being off (don't
think so) what else causes detonation? How about the fuel injectors
needing cleaning? 95,000 miles.
----
with detonation on hills. Using 87 octane gas, and driving at
altitudes over 5,000 feet. Other than the timing being off (don't
think so) what else causes detonation? How about the fuel injectors
needing cleaning? 95,000 miles.
----
11-13-2005, 01:40 PM
#2
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem
---- did pass the time by typing:
> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
> with detonation on hills. Using 87 octane gas, and driving at
> altitudes over 5,000 feet. Other than the timing being off (don't
> think so) what else causes detonation? How about the fuel injectors
> needing cleaning? 95,000 miles.
Generally a lean mixture or hot spot.
Your describing "detonation under load" which is usually fuel related.
so my guess is clogged fuel filter, low fuel pressure/flow, or too
low of an octane/bad gas, and sometimes sparkplugs if your running to
high of a heat range or your picking up crossfire. How old is your filter?
Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
> with detonation on hills. Using 87 octane gas, and driving at
> altitudes over 5,000 feet. Other than the timing being off (don't
> think so) what else causes detonation? How about the fuel injectors
> needing cleaning? 95,000 miles.
Generally a lean mixture or hot spot.
Your describing "detonation under load" which is usually fuel related.
so my guess is clogged fuel filter, low fuel pressure/flow, or too
low of an octane/bad gas, and sometimes sparkplugs if your running to
high of a heat range or your picking up crossfire. How old is your filter?
Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
11-13-2005, 01:40 PM
#3
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem
---- did pass the time by typing:
> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
> with detonation on hills. Using 87 octane gas, and driving at
> altitudes over 5,000 feet. Other than the timing being off (don't
> think so) what else causes detonation? How about the fuel injectors
> needing cleaning? 95,000 miles.
Generally a lean mixture or hot spot.
Your describing "detonation under load" which is usually fuel related.
so my guess is clogged fuel filter, low fuel pressure/flow, or too
low of an octane/bad gas, and sometimes sparkplugs if your running to
high of a heat range or your picking up crossfire. How old is your filter?
Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
> with detonation on hills. Using 87 octane gas, and driving at
> altitudes over 5,000 feet. Other than the timing being off (don't
> think so) what else causes detonation? How about the fuel injectors
> needing cleaning? 95,000 miles.
Generally a lean mixture or hot spot.
Your describing "detonation under load" which is usually fuel related.
so my guess is clogged fuel filter, low fuel pressure/flow, or too
low of an octane/bad gas, and sometimes sparkplugs if your running to
high of a heat range or your picking up crossfire. How old is your filter?
Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
11-13-2005, 01:40 PM
#4
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem
---- did pass the time by typing:
> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
> with detonation on hills. Using 87 octane gas, and driving at
> altitudes over 5,000 feet. Other than the timing being off (don't
> think so) what else causes detonation? How about the fuel injectors
> needing cleaning? 95,000 miles.
Generally a lean mixture or hot spot.
Your describing "detonation under load" which is usually fuel related.
so my guess is clogged fuel filter, low fuel pressure/flow, or too
low of an octane/bad gas, and sometimes sparkplugs if your running to
high of a heat range or your picking up crossfire. How old is your filter?
Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
> with detonation on hills. Using 87 octane gas, and driving at
> altitudes over 5,000 feet. Other than the timing being off (don't
> think so) what else causes detonation? How about the fuel injectors
> needing cleaning? 95,000 miles.
Generally a lean mixture or hot spot.
Your describing "detonation under load" which is usually fuel related.
so my guess is clogged fuel filter, low fuel pressure/flow, or too
low of an octane/bad gas, and sometimes sparkplugs if your running to
high of a heat range or your picking up crossfire. How old is your filter?
Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
--
-- DougW -- 93 ZJ 4.0 http://members.***.net/wilsond
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!
11-13-2005, 03:32 PM
#5
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem
Detonation/pinging is often caused by a carbon build-up inside the
combustion chambers. The fastest/easiest/best way to get rid of the
carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
trickle around 16 ounces of water into the air intake (carb or throttle
body) with the engine running. By slow, I mean it should take around
two minutes to drain the container. Be sure too to keep good control on
the container to avoid dumping the contents too quickly which could
cause hydrolock/engine damage.
This technique is VERY/COMPLETELY effective at getting rid of the carbon
deposits. The carbon causes the pinging by continuing to glow after the
combustion stroke which then prematurely ignites the air-fuel mixture
during the next combustion stroke.
Jerry
DougW wrote:
> ---- did pass the time by typing:
>
>>I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>with detonation on hills. Using 87 octane gas, and driving at
>>altitudes over 5,000 feet. Other than the timing being off (don't
>>think so) what else causes detonation? How about the fuel injectors
>>needing cleaning? 95,000 miles.
>
>
> Generally a lean mixture or hot spot.
>
> Your describing "detonation under load" which is usually fuel related.
> so my guess is clogged fuel filter, low fuel pressure/flow, or too
> low of an octane/bad gas, and sometimes sparkplugs if your running to
> high of a heat range or your picking up crossfire. How old is your filter?
>
> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
> out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
>
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
combustion chambers. The fastest/easiest/best way to get rid of the
carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
trickle around 16 ounces of water into the air intake (carb or throttle
body) with the engine running. By slow, I mean it should take around
two minutes to drain the container. Be sure too to keep good control on
the container to avoid dumping the contents too quickly which could
cause hydrolock/engine damage.
This technique is VERY/COMPLETELY effective at getting rid of the carbon
deposits. The carbon causes the pinging by continuing to glow after the
combustion stroke which then prematurely ignites the air-fuel mixture
during the next combustion stroke.
Jerry
DougW wrote:
> ---- did pass the time by typing:
>
>>I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>with detonation on hills. Using 87 octane gas, and driving at
>>altitudes over 5,000 feet. Other than the timing being off (don't
>>think so) what else causes detonation? How about the fuel injectors
>>needing cleaning? 95,000 miles.
>
>
> Generally a lean mixture or hot spot.
>
> Your describing "detonation under load" which is usually fuel related.
> so my guess is clogged fuel filter, low fuel pressure/flow, or too
> low of an octane/bad gas, and sometimes sparkplugs if your running to
> high of a heat range or your picking up crossfire. How old is your filter?
>
> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
> out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
>
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
11-13-2005, 03:32 PM
#6
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem
Detonation/pinging is often caused by a carbon build-up inside the
combustion chambers. The fastest/easiest/best way to get rid of the
carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
trickle around 16 ounces of water into the air intake (carb or throttle
body) with the engine running. By slow, I mean it should take around
two minutes to drain the container. Be sure too to keep good control on
the container to avoid dumping the contents too quickly which could
cause hydrolock/engine damage.
This technique is VERY/COMPLETELY effective at getting rid of the carbon
deposits. The carbon causes the pinging by continuing to glow after the
combustion stroke which then prematurely ignites the air-fuel mixture
during the next combustion stroke.
Jerry
DougW wrote:
> ---- did pass the time by typing:
>
>>I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>with detonation on hills. Using 87 octane gas, and driving at
>>altitudes over 5,000 feet. Other than the timing being off (don't
>>think so) what else causes detonation? How about the fuel injectors
>>needing cleaning? 95,000 miles.
>
>
> Generally a lean mixture or hot spot.
>
> Your describing "detonation under load" which is usually fuel related.
> so my guess is clogged fuel filter, low fuel pressure/flow, or too
> low of an octane/bad gas, and sometimes sparkplugs if your running to
> high of a heat range or your picking up crossfire. How old is your filter?
>
> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
> out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
>
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
combustion chambers. The fastest/easiest/best way to get rid of the
carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
trickle around 16 ounces of water into the air intake (carb or throttle
body) with the engine running. By slow, I mean it should take around
two minutes to drain the container. Be sure too to keep good control on
the container to avoid dumping the contents too quickly which could
cause hydrolock/engine damage.
This technique is VERY/COMPLETELY effective at getting rid of the carbon
deposits. The carbon causes the pinging by continuing to glow after the
combustion stroke which then prematurely ignites the air-fuel mixture
during the next combustion stroke.
Jerry
DougW wrote:
> ---- did pass the time by typing:
>
>>I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>with detonation on hills. Using 87 octane gas, and driving at
>>altitudes over 5,000 feet. Other than the timing being off (don't
>>think so) what else causes detonation? How about the fuel injectors
>>needing cleaning? 95,000 miles.
>
>
> Generally a lean mixture or hot spot.
>
> Your describing "detonation under load" which is usually fuel related.
> so my guess is clogged fuel filter, low fuel pressure/flow, or too
> low of an octane/bad gas, and sometimes sparkplugs if your running to
> high of a heat range or your picking up crossfire. How old is your filter?
>
> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
> out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
>
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
11-13-2005, 03:32 PM
#7
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem
Detonation/pinging is often caused by a carbon build-up inside the
combustion chambers. The fastest/easiest/best way to get rid of the
carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
trickle around 16 ounces of water into the air intake (carb or throttle
body) with the engine running. By slow, I mean it should take around
two minutes to drain the container. Be sure too to keep good control on
the container to avoid dumping the contents too quickly which could
cause hydrolock/engine damage.
This technique is VERY/COMPLETELY effective at getting rid of the carbon
deposits. The carbon causes the pinging by continuing to glow after the
combustion stroke which then prematurely ignites the air-fuel mixture
during the next combustion stroke.
Jerry
DougW wrote:
> ---- did pass the time by typing:
>
>>I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>with detonation on hills. Using 87 octane gas, and driving at
>>altitudes over 5,000 feet. Other than the timing being off (don't
>>think so) what else causes detonation? How about the fuel injectors
>>needing cleaning? 95,000 miles.
>
>
> Generally a lean mixture or hot spot.
>
> Your describing "detonation under load" which is usually fuel related.
> so my guess is clogged fuel filter, low fuel pressure/flow, or too
> low of an octane/bad gas, and sometimes sparkplugs if your running to
> high of a heat range or your picking up crossfire. How old is your filter?
>
> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
> out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
>
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
combustion chambers. The fastest/easiest/best way to get rid of the
carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
trickle around 16 ounces of water into the air intake (carb or throttle
body) with the engine running. By slow, I mean it should take around
two minutes to drain the container. Be sure too to keep good control on
the container to avoid dumping the contents too quickly which could
cause hydrolock/engine damage.
This technique is VERY/COMPLETELY effective at getting rid of the carbon
deposits. The carbon causes the pinging by continuing to glow after the
combustion stroke which then prematurely ignites the air-fuel mixture
during the next combustion stroke.
Jerry
DougW wrote:
> ---- did pass the time by typing:
>
>>I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>with detonation on hills. Using 87 octane gas, and driving at
>>altitudes over 5,000 feet. Other than the timing being off (don't
>>think so) what else causes detonation? How about the fuel injectors
>>needing cleaning? 95,000 miles.
>
>
> Generally a lean mixture or hot spot.
>
> Your describing "detonation under load" which is usually fuel related.
> so my guess is clogged fuel filter, low fuel pressure/flow, or too
> low of an octane/bad gas, and sometimes sparkplugs if your running to
> high of a heat range or your picking up crossfire. How old is your filter?
>
> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
> out of a very old filter. http://www.revbeergoggles.com/temp/fuelfilter.jpg
>
>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
11-13-2005, 03:34 PM
#8
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem P.S.
You'll also need to keep the RPMs up a little during this process.
Jerry Bransford wrote:
> Detonation/pinging is often caused by a carbon build-up inside the
> combustion chambers. The fastest/easiest/best way to get rid of the
> carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
> trickle around 16 ounces of water into the air intake (carb or throttle
> body) with the engine running. By slow, I mean it should take around
> two minutes to drain the container. Be sure too to keep good control on
> the container to avoid dumping the contents too quickly which could
> cause hydrolock/engine damage.
>
> This technique is VERY/COMPLETELY effective at getting rid of the carbon
> deposits. The carbon causes the pinging by continuing to glow after the
> combustion stroke which then prematurely ignites the air-fuel mixture
> during the next combustion stroke.
>
> Jerry
>
> DougW wrote:
>
>> ---- did pass the time by typing:
>>
>>> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>> with detonation on hills. Using 87 octane gas, and driving at
>>> altitudes over 5,000 feet. Other than the timing being off (don't
>>> think so) what else causes detonation? How about the fuel injectors
>>> needing cleaning? 95,000 miles.
>>
>>
>>
>> Generally a lean mixture or hot spot.
>>
>> Your describing "detonation under load" which is usually fuel related.
>> so my guess is clogged fuel filter, low fuel pressure/flow, or too
>> low of an octane/bad gas, and sometimes sparkplugs if your running to
>> high of a heat range or your picking up crossfire. How old is your
>> filter?
>>
>> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
>> out of a very old filter.
>> http://www.revbeergoggles.com/temp/fuelfilter.jpg
>>
>>
>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
Jerry Bransford wrote:
> Detonation/pinging is often caused by a carbon build-up inside the
> combustion chambers. The fastest/easiest/best way to get rid of the
> carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
> trickle around 16 ounces of water into the air intake (carb or throttle
> body) with the engine running. By slow, I mean it should take around
> two minutes to drain the container. Be sure too to keep good control on
> the container to avoid dumping the contents too quickly which could
> cause hydrolock/engine damage.
>
> This technique is VERY/COMPLETELY effective at getting rid of the carbon
> deposits. The carbon causes the pinging by continuing to glow after the
> combustion stroke which then prematurely ignites the air-fuel mixture
> during the next combustion stroke.
>
> Jerry
>
> DougW wrote:
>
>> ---- did pass the time by typing:
>>
>>> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>> with detonation on hills. Using 87 octane gas, and driving at
>>> altitudes over 5,000 feet. Other than the timing being off (don't
>>> think so) what else causes detonation? How about the fuel injectors
>>> needing cleaning? 95,000 miles.
>>
>>
>>
>> Generally a lean mixture or hot spot.
>>
>> Your describing "detonation under load" which is usually fuel related.
>> so my guess is clogged fuel filter, low fuel pressure/flow, or too
>> low of an octane/bad gas, and sometimes sparkplugs if your running to
>> high of a heat range or your picking up crossfire. How old is your
>> filter?
>>
>> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
>> out of a very old filter.
>> http://www.revbeergoggles.com/temp/fuelfilter.jpg
>>
>>
>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
11-13-2005, 03:34 PM
#9
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem P.S.
You'll also need to keep the RPMs up a little during this process.
Jerry Bransford wrote:
> Detonation/pinging is often caused by a carbon build-up inside the
> combustion chambers. The fastest/easiest/best way to get rid of the
> carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
> trickle around 16 ounces of water into the air intake (carb or throttle
> body) with the engine running. By slow, I mean it should take around
> two minutes to drain the container. Be sure too to keep good control on
> the container to avoid dumping the contents too quickly which could
> cause hydrolock/engine damage.
>
> This technique is VERY/COMPLETELY effective at getting rid of the carbon
> deposits. The carbon causes the pinging by continuing to glow after the
> combustion stroke which then prematurely ignites the air-fuel mixture
> during the next combustion stroke.
>
> Jerry
>
> DougW wrote:
>
>> ---- did pass the time by typing:
>>
>>> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>> with detonation on hills. Using 87 octane gas, and driving at
>>> altitudes over 5,000 feet. Other than the timing being off (don't
>>> think so) what else causes detonation? How about the fuel injectors
>>> needing cleaning? 95,000 miles.
>>
>>
>>
>> Generally a lean mixture or hot spot.
>>
>> Your describing "detonation under load" which is usually fuel related.
>> so my guess is clogged fuel filter, low fuel pressure/flow, or too
>> low of an octane/bad gas, and sometimes sparkplugs if your running to
>> high of a heat range or your picking up crossfire. How old is your
>> filter?
>>
>> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
>> out of a very old filter.
>> http://www.revbeergoggles.com/temp/fuelfilter.jpg
>>
>>
>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
Jerry Bransford wrote:
> Detonation/pinging is often caused by a carbon build-up inside the
> combustion chambers. The fastest/easiest/best way to get rid of the
> carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
> trickle around 16 ounces of water into the air intake (carb or throttle
> body) with the engine running. By slow, I mean it should take around
> two minutes to drain the container. Be sure too to keep good control on
> the container to avoid dumping the contents too quickly which could
> cause hydrolock/engine damage.
>
> This technique is VERY/COMPLETELY effective at getting rid of the carbon
> deposits. The carbon causes the pinging by continuing to glow after the
> combustion stroke which then prematurely ignites the air-fuel mixture
> during the next combustion stroke.
>
> Jerry
>
> DougW wrote:
>
>> ---- did pass the time by typing:
>>
>>> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>> with detonation on hills. Using 87 octane gas, and driving at
>>> altitudes over 5,000 feet. Other than the timing being off (don't
>>> think so) what else causes detonation? How about the fuel injectors
>>> needing cleaning? 95,000 miles.
>>
>>
>>
>> Generally a lean mixture or hot spot.
>>
>> Your describing "detonation under load" which is usually fuel related.
>> so my guess is clogged fuel filter, low fuel pressure/flow, or too
>> low of an octane/bad gas, and sometimes sparkplugs if your running to
>> high of a heat range or your picking up crossfire. How old is your
>> filter?
>>
>> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
>> out of a very old filter.
>> http://www.revbeergoggles.com/temp/fuelfilter.jpg
>>
>>
>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
11-13-2005, 03:34 PM
#10
Guest
Posts: n/a
Re: '93 JGC 318 Engine Ping Problem P.S.
You'll also need to keep the RPMs up a little during this process.
Jerry Bransford wrote:
> Detonation/pinging is often caused by a carbon build-up inside the
> combustion chambers. The fastest/easiest/best way to get rid of the
> carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
> trickle around 16 ounces of water into the air intake (carb or throttle
> body) with the engine running. By slow, I mean it should take around
> two minutes to drain the container. Be sure too to keep good control on
> the container to avoid dumping the contents too quickly which could
> cause hydrolock/engine damage.
>
> This technique is VERY/COMPLETELY effective at getting rid of the carbon
> deposits. The carbon causes the pinging by continuing to glow after the
> combustion stroke which then prematurely ignites the air-fuel mixture
> during the next combustion stroke.
>
> Jerry
>
> DougW wrote:
>
>> ---- did pass the time by typing:
>>
>>> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>> with detonation on hills. Using 87 octane gas, and driving at
>>> altitudes over 5,000 feet. Other than the timing being off (don't
>>> think so) what else causes detonation? How about the fuel injectors
>>> needing cleaning? 95,000 miles.
>>
>>
>>
>> Generally a lean mixture or hot spot.
>>
>> Your describing "detonation under load" which is usually fuel related.
>> so my guess is clogged fuel filter, low fuel pressure/flow, or too
>> low of an octane/bad gas, and sometimes sparkplugs if your running to
>> high of a heat range or your picking up crossfire. How old is your
>> filter?
>>
>> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
>> out of a very old filter.
>> http://www.revbeergoggles.com/temp/fuelfilter.jpg
>>
>>
>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
Jerry Bransford wrote:
> Detonation/pinging is often caused by a carbon build-up inside the
> combustion chambers. The fastest/easiest/best way to get rid of the
> carbon is to use an old mechanic's technique. Slowly (SLOWLY!!!)
> trickle around 16 ounces of water into the air intake (carb or throttle
> body) with the engine running. By slow, I mean it should take around
> two minutes to drain the container. Be sure too to keep good control on
> the container to avoid dumping the contents too quickly which could
> cause hydrolock/engine damage.
>
> This technique is VERY/COMPLETELY effective at getting rid of the carbon
> deposits. The carbon causes the pinging by continuing to glow after the
> combustion stroke which then prematurely ignites the air-fuel mixture
> during the next combustion stroke.
>
> Jerry
>
> DougW wrote:
>
>> ---- did pass the time by typing:
>>
>>> I have a '93 JGC with the 318 V-8 engine. Having a lot of trouble
>>> with detonation on hills. Using 87 octane gas, and driving at
>>> altitudes over 5,000 feet. Other than the timing being off (don't
>>> think so) what else causes detonation? How about the fuel injectors
>>> needing cleaning? 95,000 miles.
>>
>>
>>
>> Generally a lean mixture or hot spot.
>>
>> Your describing "detonation under load" which is usually fuel related.
>> so my guess is clogged fuel filter, low fuel pressure/flow, or too
>> low of an octane/bad gas, and sometimes sparkplugs if your running to
>> high of a heat range or your picking up crossfire. How old is your
>> filter?
>>
>> Crapoline: http://revbeergoggles.com/badgas/ Also what you can get
>> out of a very old filter.
>> http://www.revbeergoggles.com/temp/fuelfilter.jpg
>>
>>
>>
>
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/