engine pinging
02-15-2012, 03:41 AM
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Car: 2010 2SS/RS L99-1987 Iroc-z
Engine: 383sbc/Built 350TPI
Transmission: Built T56/700R4
engine pinging
I got a 87 Iroc 350tpi and the engine pings when driving normal.I have set the timing to everything to see if it would stop wit the est unplugged wit no luck.any one know anything I can check to see if something isn't right or wrong.
New
Maf
Spark plugs and wires
Tps
Idle air valve
Coil
Control module(h.e.I)
New
Maf
Spark plugs and wires
Tps
Idle air valve
Coil
Control module(h.e.I)
02-15-2012, 06:45 AM
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Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: engine pinging
Assume this is pre-ignition. Not detonation at WOT?
EGR. EGR provides exhaust gas into the combustion chamber in order to cool combustion temps and reduce pinging at low throttle tip in. This allows the ECM to command more timing advance with a leaner mixture at low throttle cruise for better mileage.
Pinging is also more prevalent at higher engine temps and can be exacerbated by bad, or the wrong kind of, plugs.
EGR. EGR provides exhaust gas into the combustion chamber in order to cool combustion temps and reduce pinging at low throttle tip in. This allows the ECM to command more timing advance with a leaner mixture at low throttle cruise for better mileage.
Pinging is also more prevalent at higher engine temps and can be exacerbated by bad, or the wrong kind of, plugs.
02-15-2012, 02:23 PM
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Car: 2010 2SS/RS L99-1987 Iroc-z
Engine: 383sbc/Built 350TPI
Transmission: Built T56/700R4
Re: engine pinging
Assume this is pre-ignition. Not detonation at WOT?
EGR. EGR provides exhaust gas into the combustion chamber in order to cool combustion temps and reduce pinging at low throttle tip in. This allows the ECM to command more timing advance with a leaner mixture at low throttle cruise for better mileage.
Pinging is also more prevalent at higher engine temps and can be exacerbated by bad, or the wrong kind of, plugs.
EGR. EGR provides exhaust gas into the combustion chamber in order to cool combustion temps and reduce pinging at low throttle tip in. This allows the ECM to command more timing advance with a leaner mixture at low throttle cruise for better mileage.
Pinging is also more prevalent at higher engine temps and can be exacerbated by bad, or the wrong kind of, plugs.
I really dont know what its called,just know that its not like a rod knocking..just know that i can feel it while im in the car and really feel it shakin bad when i give it some gas..its been doiing this for weeks now but at first wasnt bad,would only act up i guess after the car warmed up maybe but now all the time...could be egr as well..thats one thing i havent changed in it
02-15-2012, 02:27 PM
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Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: engine pinging
Pinging won't cause 'bad' shaking. Sounds like a mis-fire. Check all of you ignition components, check your injectors, check for trouble codes.
It could still be a sticking EGR valve, but another cause is more likely. You can check your EGR by disconnecting it to see if this affects it.
It could still be a sticking EGR valve, but another cause is more likely. You can check your EGR by disconnecting it to see if this affects it.
02-15-2012, 02:44 PM
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Car: 2010 2SS/RS L99-1987 Iroc-z
Engine: 383sbc/Built 350TPI
Transmission: Built T56/700R4
Re: engine pinging
Pinging won't cause 'bad' shaking. Sounds like a mis-fire. Check all of you ignition components, check your injectors, check for trouble codes.
It could still be a sticking EGR valve, but another cause is more likely. You can check your EGR by disconnecting it to see if this affects it.
It could still be a sticking EGR valve, but another cause is more likely. You can check your EGR by disconnecting it to see if this affects it.
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02-15-2012, 03:04 PM
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Car: 1987 SC/1985 TA
Engine: 350/vortec/fitech
Transmission: T56
Axle/Gears: 3.27 9-bolt
Re: engine pinging
I'd repost this as a mis-fire/shakin real bad issue in the TPI tech board.
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