Engine ping

[SLPRC5]

Here I go again... My 1997 A4 has, a 224/224 567/.567 lift and the LSA is 114. Patriot heads P/P with a mill to 62cc chambers. My tuner has installed new..new plugs, replaced the Air Temp Sensor in the air bridge. And the "ping" is still there. The only way he can get the knock out is to lower the timimg to 16, but this loses a hugh amount of hourse power. His next step is to replace the PCM..because each time he over writes it, the PCM locks up. So he is at ends wit as to what else to do to get the ping out so he can tune it properly. The ping was there before he removed and installed the new heads. I even mentioned using Sea Foam to clean the carbon out. The heads are new..and he cleaned the tops of the pistons He is using HP tuning software... Has anyone else had this problem? Thanks for any input.. SLPRC5

[SSpdDmon]

Might be crappy knock sensors. You could look into using the settings from a newer '99+ C5 and maybe swapping out the knock sensors for some newer ones.

[SLPRC5]

Originally Posted by SSpdDmon

Might be crappy knock sensors. You could look into using the settings from a newer '99+ C5 and maybe swapping out the knock sensors for some newer ones.

Forgot to mention that the knock sensors were replaced when the new heads were installed. The tuner did install a '98 program

[SLPRC5]

Changed the PCM and the problem is solved. Also replaced the battery, so one of the two solved the problem.

[htp2000]

hey my car pings when i give it gas hard exceleration. hmm i changed everything wires plugs fuel filter even put a 180 thermostat with new coolant lol however when changeing my cooland and following the fill procedures reving the engine to 3000 rpm till it reached 200 degrees in my garrage i noticed that one header pipe on each side second one from the fire wall were glowing red all the rest werent glowing in this normal i bought the car like this with header and exhaust. dont know if the guy tuned it. when you say hp tune is it one of them tuners you buy from hyper tech?if so wich is better hp or predator maybe i need a pcm too were did you buy yours and do the numbers have to match or can you just throw anyone in there how much u pay for a pcm maybe i should try a battery first or buy a tuner i hate trowing money away i took it to a mechanic and he pluged in his little fancy snap on code reader and he said everything was ok just shows a coolant temp sensor low voltage he said that wouldnt cause the ping. but when i took it home i noticed the lf front o2 sensor the wires were melted on the headers and his snap on code reader didnt pick it up neither did it show on my cars infor center on the cluster strange any advice??

[SLPRC5]

Originally Posted by htp2000

hey my car pings when i give it gas hard exceleration. hmm i changed everything wires plugs fuel filter even put a 180 thermostat with new coolant lol however when changeing my cooland and following the fill procedures reving the engine to 3000 rpm till it reached 200 degrees in my garrage i noticed that one header pipe on each side second one from the fire wall were glowing red all the rest werent glowing in this normal i bought the car like this with header and exhaust. dont know if the guy tuned it. when you say hp tune is it one of them tuners you buy from hyper tech?if so wich is better hp or predator maybe i need a pcm too were did you buy yours and do the numbers have to match or can you just throw anyone in there how much u pay for a pcm maybe i should try a battery first or buy a tuner i hate trowing money away i took it to a mechanic and he pluged in his little fancy snap on code reader and he said everything was ok just shows a coolant temp sensor low voltage he said that wouldnt cause the ping. but when i took it home i noticed the lf front o2 sensor the wires were melted on the headers and his snap on code reader didnt pick it up neither did it show on my cars infor center on the cluster strange any advice??

You have a O2 sensor wire burnt by the header..I believe it would be a problem.
Depending on the year of your car..the VIN# is assigned to the PCM..I think they stopped this in 2000.
My PCM was purchased at the dealership $200+and the dealership had to re-flash it with a stock tune $150.00.
Check out replacing the air temp sensor in the airbridge..if it is bad it will cause the engine ping. If that's not the fix run a can of Sea Foam through the vaccum line coming from the brake boster and let the car set overnight and then drive it until all the smoke is gone.
I wouldn't waste money on a hand held tuner..take it to be dyno or street tuned.
Yes reving to high RPMs will case the headers to turn red.

[htp2000]

ok thanks sleeper. ill try the air sensor thing cant go wrong there like 12 bucks

[SLPRC5]

Originally Posted by htp2000

ok thanks sleeper. ill try the air sensor thing cant go wrong there like 12 bucks

Here is the trouble shooting LINK on the engine ping:

http://forums.corvetteforum.com/show....php?t=1680754