Ok so I have a stock 99 acura integra. Engine runs solid at a cold start in open loop. However, as soon as it starts to warm up. Rpms go down to the lowest 700 and wants to stall. Once it is in closed loop the STFT will drop to negative 20+, I noticed if I snap the throttle it will zero out but quickly run rich again, if I hold the throttle open to 2500 rpm the STFT will move closer to zero but sort of jump to more negative fuel trim and then jumps back again to closer to zero. And will keep doing this. Sometimes it will briefly hold it but never stays constant. Also at idle I noticed the ignition advance is 15to 20+%, I have no idea where to go from here. Only did fuel filter, sparkplugs. On a side note I checked for vacuum leaks and could not find any and and the map sensor reading will be at 10-12hg on the scanner, if engine is off it will read 28hg, also I dont know if this is relevant but the 02sv11 reading will be at 1.2v sometimes on the scannerl. Im sorry if this is all confusing im just writing everything ive noticed. I have been reading and this could be many things. Where would you go from here, whoever you are thank you for reading this, any help would be greatly appreciated,
have the same problem?
Saturday, September 12th, 2015 AT 4:05 PM