Hello,


My check engine light came on today. I took it to autozone and it read error code PO171,

Based on that it means fuel mixture lean.

I went into the wiki and looked up what could be causing it. It says that it could be the map, oxygen sensor, or even a mechanical thing.
I will do a compression test tomorrow, but what do you guys think it could be? Could it be what I have done to the engine? I have a low compression, race port on the head with 5 degree valve job, oversized valves and crane 16's. I doubt that could be it, but just wondering.

Also, the car has a funky idle, like as if it was stuck on cold start. On that note when I smell the exhaust gases they smell as if the car was running rich; which could mean that the O2 sensor is about to take a dump.

what do you guys think?

Thanks

Oscar

I would check the O2 sensors, most importantly the downpipe one upstream.

reset ur ecu. happens all the time.

Originally posted by 420agreenvilleSC
reset ur ecu. happens all the time.

If by resetting the ECU you mean unplugging it for 15 minutes, I already did that. Will try it again though.

Crane 16's are somewhat lopey Barza, so your idle is probably normal for your cams.

BTW, sell them to me ;)

your car's already together tim. i'm not dissassembling...

Originally posted by teklein
Crane 16's are somewhat lopey Barza, so your idle is probably normal for your cams. BTW, sell them to me ;)

LOL! I will sell them once I get my next ride lol.

This idle is different, the rpms fall really low as if it wants to die.

could it possibly be a dying coolant temp sensor? that can fuck with the AF ratio as well.

might want to bust out a multimeter and check that.