During my last race I noticed my A/F ratio slowing climbing and going lean at wide open, saw 13.5 then 14.2 then 14.9 and I went back to the pits. I shut my car off and went to find a fuel pressure gauge. When I went to restart the car it just clicked. I tested the battery and it was at 11.3V and 125CCA. I had a spare alternator so I swapped it and charged the battery and everything seemed fine.
I went out the next day for practice/qualifying and my car ran fine. 30 minutes before the race I start my car and it wont idle, I have to hold the pedal to get it to run. I finally get it to idle and it doesn't sound good. I skip the race thinking I leaned it out too much and now I have no compression. When I get back home I do compression, leakdown and check vacuum and can't find anything wrong. I start checking things by the alternator and just touch the IAC connector and it instantly runs better. I check that its connected all the way and it is. I pull the connector off and there is oil on the lower pin of the connector. I haven't touched this connector in 5 years and I've never spilled oil on it.
Did something happen to my IAC when the alternator died or is this just coincidence?
Also why in the hell is it $650 for a new one?
iac.jpg 51.84KB 0 downloads