Pop / backfire through the throttle body?
I installed my vintage Stillen K&N filtercharger on my P10 which otherwise is completely stock. After the installation, the moment I started her up and gave her a rev I was greeted by a pop back through the intake. I dismissed it as a fluke and it ran great with no issues for a week. This past Sunday I was sitting at a light, it turned green and as I feathered the throttle to pull out I got another pop with a stumble. Hmmm? Today I stopped to back into the driveway of our babysitter and again, pop and stumble.
It has no other drivability issues and has been running great otherwise, and as you can see it only happens occasionally.
Two things I've noticed that may be related. The first week I had the car I changed the cap and rotor, I noticed a tiny bit of oil on the rotor and it does appear I have oil seepage in the area below the distributor. I believe this is a failed distributor o-ring and I very well may have more oil in the cap/on the rotor.
I also noticed that I'm getting exhaust gases OUT of the breather I installed on the AIV/PAIR valve. This seems to indicate and issue with the valve itself or the vacuum controlling it. I doubt this is related, although worthy of a mention and needing to be addressed anyway.
This weekend I am going to...
1- Check the timing
2- Pull cap and check for oil seepage
3- Check all hoses and vacuum lines in the AIV/PAIR valve circuit
Other suggestions welcome, please. Thank you in advance. Time for a glass of red....
It has no other drivability issues and has been running great otherwise, and as you can see it only happens occasionally.
Two things I've noticed that may be related. The first week I had the car I changed the cap and rotor, I noticed a tiny bit of oil on the rotor and it does appear I have oil seepage in the area below the distributor. I believe this is a failed distributor o-ring and I very well may have more oil in the cap/on the rotor.
I also noticed that I'm getting exhaust gases OUT of the breather I installed on the AIV/PAIR valve. This seems to indicate and issue with the valve itself or the vacuum controlling it. I doubt this is related, although worthy of a mention and needing to be addressed anyway.
This weekend I am going to...
1- Check the timing
2- Pull cap and check for oil seepage
3- Check all hoses and vacuum lines in the AIV/PAIR valve circuit
Other suggestions welcome, please. Thank you in advance. Time for a glass of red....
Last edited by SE-RMonkey
on 2014-03-05
at 01-58-52.