ok i keep throwing a p0172 code randomly, usually on the highway at a constant speed 1 time a week. my cyl #1 (cyl closest to the passenger side of car) is flooding with gas and mixing with oil and pouring out of my pvc valve into my cai. the excess gas is thinning my oil and causing my cyl 1 to loose compression aroud 150 or so. to prove this we poured oil through the spark plug hole and manually cranked the car then removed the excess oil and did a compression the results were 190. what could be causing the excess gas in only cyl # 1 thinning the oil? i have 60 lb injectors so were all thinking a bad injector, bad harness, pcm issue, maf issue (we cleaned and examined it and it looked good) or 02 sensor. the cylinder walls were perfect with no scratches or damages of any kind so that along with our oil test tells us the rings are fine. so any suggestions? ps i was also throwing the p0172 code before i did the 60lb injectors and the new tune. what should i do? what could be causing this? how can i fix it? is it possible to switch the 2 o2 sensors on the exhaust? reason i ask is because the rear 02 is turned off because i dont have a cat. thanks guys
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The MAF may look fine and still have damage. My MAF actually failed at the harness, not at the hot wire. I'm gonna say check your MAF, and your intake for leaks. The compression thing is a bit beyond my scope, but if you are blowing that much extra fuel around I'd assume you'd have a misfire code and some driveablity issues as well..