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Author
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Topic: How to cure pinging?
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Unregistered
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Member # 786
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posted
 
 
I have a '95 gt with heads, cam, intake, 24lb. injectors, 190lph. fuel pump, and it pings alot, even worse in hot weather. Besides timing what else could be causing it to ping? Thanks.
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Hungry Hippo
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Member # 537
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try an adjustable fuel pressure regulator and set it between 42-44psi with the vacuum hose off
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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Mean2001GT
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Member # 1750
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posted
a fuel regulator would probably do the trick. but it also could be running too hot, maybe some water wetter or low temp thromostat
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--Silver 2001 GT--
13.020 @ 110.46
340.2 rwhp
339.8 rwtq
Posts: 158 | From: San Ramon, CA | Registered: Aug 2002
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Stimson
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Member # 51
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posted
The number one cause of pinging is too much timing advance for your combo ![[Smile]](smile.gif) What is your base timing set at?
Posts: 2373 | Registered: Jun 2000
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Unregistered
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Member # 786
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posted
I have an adjustable fuel pressure regulator, set at 39.
And I haven't checked the timing lately but it should be set at 13.
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Richard95stang
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Member # 91
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posted
Get a custom chip burned. That byron chip made wonders on my 95 GT after the heads, cam, intake, etc. install. My car would ping like crazy, and after I took it to apex my shit ran cherry ![[Wink]](wink.gif)
Posts: 1496 | From: san jose, ca. usa | Registered: Dec 2000
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Unregistered
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Member # 786
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posted
quote:
Originally posted by Mean2001GT:
a fuel regulator would probably do the trick. but it also could be running too hot, maybe some water wetter or low temp thromostat
I don't think it is running too hot, I have a fluidyne radiator, and th gauge is usually between the "N" and the "O"
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Unregistered
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Member # 786
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posted
And the fuel pressure is set between 35 and 40, how do I increase it?
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Hungry Hippo
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Member # 537
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posted
set your timing to 10* and see if it still happens.
if that doesnt work... to increase fp, tighten the adjuster on top of the regulator. try 1/4 turn and see if it helps.
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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sskiller
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Member # 1564
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Octane? I also read in 5.0 that some cars just ping and there isn't really a cure.
[ September 09, 2002, 05:07 PM: Message edited by: sskiller ]
Posts: 66 | From: St. Louis | Registered: Jul 2002
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Unregistered
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Member # 786
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posted
quote:
Originally posted by HungryHippo:
set your timing to 10* and see if it still happens.
if that doesnt work... to increase fp, tighten the adjuster on top of the regulator. try 1/4 turn and see if it helps.
Is the adjuster the screw? When I turn that it doesn't do anything, the fuel pressure doesn't change.
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Stimson
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Member # 51
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posted
a malfunctioning EGR system can also cause pinging. A custom chip will solve your problem tohugh since it will remove advance only from the part of the RPM band where you're pinging.
Posts: 2373 | Registered: Jun 2000
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Unregistered
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Member # 786
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posted
quote:
Originally posted by st5150:
a malfunctioning EGR system can also cause pinging. A custom chip will solve your problem tohugh since it will remove advance only from the part of the RPM band where you're pinging.
I know the custom chip would work but I holding that off until the new engine.
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Stimson
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Member # 51
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posted
Then just lower your base timing until you get your new motor. Simple yet effective fix ![[patriot]](graemlins/patriot.gif)
Posts: 2373 | Registered: Jun 2000
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Unregistered
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Member # 786
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posted
quote:
Originally posted by st5150:
Then just lower your base timing until you get your new motor. Simple yet effective fix
I'll try that. Is there a way I can do it without a timing light?
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Stimson
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Member # 51
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posted
If you gotta ask, I highly recomend just finding a buddy who has a timing light in their garage.
Posts: 2373 | Registered: Jun 2000
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Gear Head
JARED
Member # 779
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posted
Kevin call me and we can fix your car.
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Support our troops!
Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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Unregistered
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Member # 786
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posted
quote:
Originally posted by sic91sleeper:
Kevin call me and we can fix your car.
Yeah, I will when I get time, but I have school and work pretty much everyday.
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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SheWillSmokeYou
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Member # 452
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posted
I have (2) Autologic chips for sale $100 each...
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Just a Punk Ass small Block :)
Posts: 842 | From: So Cal | Registered: Sep 2001
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Unregistered
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Member # 786
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posted
quote:
Originally posted by Snake98Girl:
I have (2) Autologic chips for sale $100 each...
Check PM's
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Gear Head
JARED
Member # 779
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posted
Same here Fiday Saturday and Sundays are good for me.
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Support our troops!
Posts: 5685 | From: EASTBAY | Registered: Jan 2002
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SVTKate
New Member
Member # 1823
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posted
This may be way out of line.. but have you cleaned your mass air flow sensor ?
It took MONTHS of troubleshooting my 95 GT to find what was causing the pinging and coughing.. I replaced the sensor, and it was incredible, like Jeykle & Hyde. Now I clean mine about every 6 months. Alcohol and a Q-Tip.. gently.
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98 Cobra Drop Top
'With A Few Mods'
Posts: 3 | From: Central CA | Registered: Sep 2002
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Unregistered
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Member # 786
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posted
quote:
Originally posted by HungryHippo:
try an adjustable fuel pressure regulator and set it between 42-44psi with the vacuum hose off
I had another question. I was trying to get the fuel pressure up and the only time it went up is when I took the vacuum hose off. What does the vacuum hose do?
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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Unregistered
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Member # 786
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posted
Oh, BTW, the car still pings with the higher fuel pressure. I am going to set back the timing when I change the plugs. And after that I am getting full MSD.
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2001.5 Audi S4
Posts: 1785 | From: Livermore | Registered: Jan 2002
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