View Full Version : APR pinging issue when transitioning from vacuum to boost under load


LaR H 88
01-06-2005, 09:59 AM
This has been bugging me...I haven't vagged the car yet, but I'm hearing some pinging when going from vacuum to boost. For instance, if I back off the gas to decelerate at 50mph in 5th and then mash the gas, I'll get some pinging at about 0psi. I don't get any pinging at high boost or even moderate boost. It's pretty strange.

I wonder if I'm going lean. I have an intake that is a bit close to the maf (I thought I gave it enough space), but I may pull it a bit further away from the maf to see if this improves the reading. I'm also going to be changing my plugs in a few hundred miles to the NGK BKR6E's - I'll see if the current plugs are fouled soon enough.

Does anyone else have any ideas or suggestions as to why I'd be pinging at no/low boost and not at high boost? Anything else to check? TIA

canonicalman
07-10-2005, 10:09 AM
in the air system.