What does Ping sound like?
 

Hi all,

I just installed a MPI kit on my 83 CJ7 and all is fine. However, there
is a sound that is coming from the engine which I cannot determine what it
is. To me it sounds like belts moving but not really. Kinda hard to
describe. I've heard there's a problem with Pinging with MPI kits.

What does pinging sound like? How can I determine if my engine is pinging?

thanks in advance,

bill

Re: What does Ping sound like?
 

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bl5idh$8ap23$1@ID-193866.news.uni-berlin.de...
> Hi all,
>
> I just installed a MPI kit on my 83 CJ7 and all is fine. However, there
> is a sound that is coming from the engine which I cannot determine what it
> is. To me it sounds like belts moving but not really. Kinda hard to
> describe. I've heard there's a problem with Pinging with MPI kits.
>
> What does pinging sound like? How can I determine if my engine is
pinging?
>
> thanks in advance,
>
> bill
>
>

The best description I've ever heard for pinging was described as the sound
of a ball pein hammer striking a piece of aluminum, which is about the
effect it has on your pistons.

Chris

Re: What does Ping sound like?
 

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bl5idh$8ap23$1@ID-193866.news.uni-berlin.de...
> Hi all,
>
> I just installed a MPI kit on my 83 CJ7 and all is fine. However, there
> is a sound that is coming from the engine which I cannot determine what it
> is. To me it sounds like belts moving but not really. Kinda hard to
> describe. I've heard there's a problem with Pinging with MPI kits.
>
> What does pinging sound like? How can I determine if my engine is
pinging?
>
> thanks in advance,
>
> bill
>
>

The best description I've ever heard for pinging was described as the sound
of a ball pein hammer striking a piece of aluminum, which is about the
effect it has on your pistons.

Chris

Re: What does Ping sound like?
 

Pinging sounds like:

If all your hand knuckles where made of metal and you cracked your
knuckles., Then you'd know what pinging sounds like. I have bad pinging in
my 86 300ZX so I really know what pinging sounds like.

Good Luck,

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bl5idh$8ap23$1@ID-193866.news.uni-berlin.de...
> Hi all,
>
> I just installed a MPI kit on my 83 CJ7 and all is fine. However, there
> is a sound that is coming from the engine which I cannot determine what it
> is. To me it sounds like belts moving but not really. Kinda hard to
> describe. I've heard there's a problem with Pinging with MPI kits.
>
> What does pinging sound like? How can I determine if my engine is
pinging?
>
> thanks in advance,
>
> bill
>
>


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Re: What does Ping sound like?
 

Pinging sounds like:

If all your hand knuckles where made of metal and you cracked your
knuckles., Then you'd know what pinging sounds like. I have bad pinging in
my 86 300ZX so I really know what pinging sounds like.

Good Luck,

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bl5idh$8ap23$1@ID-193866.news.uni-berlin.de...
> Hi all,
>
> I just installed a MPI kit on my 83 CJ7 and all is fine. However, there
> is a sound that is coming from the engine which I cannot determine what it
> is. To me it sounds like belts moving but not really. Kinda hard to
> describe. I've heard there's a problem with Pinging with MPI kits.
>
> What does pinging sound like? How can I determine if my engine is
pinging?
>
> thanks in advance,
>
> bill
>
>


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.516 / Virus Database: 313 - Release Date: 9/1/2003

Re: What does Ping sound like?
 

I should mention I hear this the loudest when no torque is applied. That
is, at idle and between shifting gears. I don't hear it when applying load
either light or heavy.

Is pinging more prominent under load? Does it get worse when more load is
applied?

What does pinging tell about an engine? Does it indicate something negative
about an engine?

Thanks


bill



"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bl5idh$8ap23$1@ID-193866.news.uni-berlin.de...
> Hi all,
>
> I just installed a MPI kit on my 83 CJ7 and all is fine. However, there
> is a sound that is coming from the engine which I cannot determine what it
> is. To me it sounds like belts moving but not really. Kinda hard to
> describe. I've heard there's a problem with Pinging with MPI kits.
>
> What does pinging sound like? How can I determine if my engine is
pinging?
>
> thanks in advance,
>
> bill
>
>

Re: What does Ping sound like?
 

I should mention I hear this the loudest when no torque is applied. That
is, at idle and between shifting gears. I don't hear it when applying load
either light or heavy.

Is pinging more prominent under load? Does it get worse when more load is
applied?

What does pinging tell about an engine? Does it indicate something negative
about an engine?

Thanks


bill



"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bl5idh$8ap23$1@ID-193866.news.uni-berlin.de...
> Hi all,
>
> I just installed a MPI kit on my 83 CJ7 and all is fine. However, there
> is a sound that is coming from the engine which I cannot determine what it
> is. To me it sounds like belts moving but not really. Kinda hard to
> describe. I've heard there's a problem with Pinging with MPI kits.
>
> What does pinging sound like? How can I determine if my engine is
pinging?
>
> thanks in advance,
>
> bill
>
>

Re: What does Ping sound like?
 

William Oliveri did pass the time by typing:
> I should mention I hear this the loudest when no torque is applied. That
> is, at idle and between shifting gears. I don't hear it when applying load
> either light or heavy.

That doesn't sound like pinging.

> Is pinging more prominent under load? Does it get worse when more load is
> applied?

Yes and Yes. Although it is more audiable usually at high RPMs.

> What does pinging tell about an engine? Does it indicate something negative
> about an engine?

It means your fuel mix is igniting before it should. In serious cases it can
burn through the piston and/or throw rods out of an engine.
In all cases.. ALL CASES.. Pinging is BAD.

Step up one level in octane. i.e run 91 if your runnign 87 and see if the
problem goes away. You may need to flow more fuel.

The other possibility is your hearing things. :)

--
-- 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

Re: What does Ping sound like?
 

William Oliveri did pass the time by typing:
> I should mention I hear this the loudest when no torque is applied. That
> is, at idle and between shifting gears. I don't hear it when applying load
> either light or heavy.

That doesn't sound like pinging.

> Is pinging more prominent under load? Does it get worse when more load is
> applied?

Yes and Yes. Although it is more audiable usually at high RPMs.

> What does pinging tell about an engine? Does it indicate something negative
> about an engine?

It means your fuel mix is igniting before it should. In serious cases it can
burn through the piston and/or throw rods out of an engine.
In all cases.. ALL CASES.. Pinging is BAD.

Step up one level in octane. i.e run 91 if your runnign 87 and see if the
problem goes away. You may need to flow more fuel.

The other possibility is your hearing things. :)

--
-- 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

Re: What does Ping sound like?
 

If you're hearing it under no load conditions, then it probably isn't
pinging that you're hearing. Ping usually happens under high load, low RPM
conditions and can be caused by many things including incorrect timing, lean
fuel mixture, lugging the engine in the wrong gear, poor quality fuel or low
octane, carbon buildup in the combustion chamber, oil contaminating the fuel
mixture, and many other things. These are the most common however. I'm
wondering if you're possibly hearing the fuel injectors cycling? Some of
them can be quite noisy.

Chris

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:bl5omp$84bu0$1@ID-193866.news.uni-berlin.de...
> I should mention I hear this the loudest when no torque is applied. That
> is, at idle and between shifting gears. I don't hear it when applying
load
> either light or heavy.
>
> Is pinging more prominent under load? Does it get worse when more load is
> applied?
>
> What does pinging tell about an engine? Does it indicate something
negative
> about an engine?
>
> Thanks
>
>
> bill
>
>
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:bl5idh$8ap23$1@ID-193866.news.uni-berlin.de...
> > Hi all,
> >
> > I just installed a MPI kit on my 83 CJ7 and all is fine. However,
there
> > is a sound that is coming from the engine which I cannot determine what
it
> > is. To me it sounds like belts moving but not really. Kinda hard to
> > describe. I've heard there's a problem with Pinging with MPI kits.
> >
> > What does pinging sound like? How can I determine if my engine is
> pinging?
> >
> > thanks in advance,
> >
> > bill
> >
> >
>
>