'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. ---- |
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.cox.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! |
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.cox.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! |
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.cox.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! |
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.cox.net/jerrypb/ |
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.cox.net/jerrypb/ |
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.cox.net/jerrypb/ |
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.cox.net/jerrypb/ |
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.cox.net/jerrypb/ |
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.cox.net/jerrypb/ |
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