L98 pinging in fourth gear
#1
Member
Thread Starter
L98 pinging in fourth gear
I have noticed recently that when I'm in overdrive my engine will ping once it reaches 4th gear. It runs perfectly fine but once my RPM's drop because it goes into 4th it pings like crazy. If I step on it and bring the RPM's back up it stops. I almost always use premium fuel and sometimes regular. But even when I use premium it still pings. If anyone can help that would be great thanks.
#3
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#4
Senior Member
Re: L98 pinging in fourth gear
Raise fuel pressure 1-2 psi
#6
Member
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Re: L98 pinging in fourth gear
Thanks for the info. I will take a look at it and see if it is near 6dbtdc and if not I'm going to have to track down the problem
#7
Supreme Member
Re: L98 pinging in fourth gear
Or plugged or partially plugged EGR passages.
Could also be carbon build up in the combustion chambers, knock sensor, EST module, etc.
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#8
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#9
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Re: L98 pinging in fourth gear
If the egr is non operational removing it will not solve the problem.
This could be a result of a lean condition faulty injectors or low fuel pressure.
#10
Member
Thread Starter
Re: L98 pinging in fourth gear
During cruising speeds light load the egr is commanded on. Timing is advanced when the Combustion chamber is being cooled.
If the egr is non operational removing it will not solve the problem.
This could be a result of a lean condition faulty injectors or low fuel pressure.
If the egr is non operational removing it will not solve the problem.
This could be a result of a lean condition faulty injectors or low fuel pressure.