First I'd like to apologize for the long winded post, i wanted to give as much detail as possible.
Ok, so i've searched through this forum trying to find similar cases to mine but i can't find one that matches fully. My CRX has had idle trouble since i got it about 8 months ago...idling high on startup, surging randomly, and every once in a while the PGM-FI light will pop on and the engine acts like it's missing a cylinder. I checked the ECU when the PGM light was off and it was showing OXXO...coolant sensor, and when the light was on it was showing XXXO...oxygen sensor.
The fuel pump was whining a bit and from what I read here, I decided to replace it and the filter, but the big problem still persists: without any discernable trigger, the engine will run very rough on startup and die shortly thereafter. Once it dies it tries to start when i crank it only turns over once or twice then goes to a dry crank.
My questions are these:
could the oxygen and coolant sensors be causing such problems with starting/idling and,
I've read here that there are 2 coolant sensors, one on the thermostat housing and one in the block...where is the one in the block located? it isn't in my haynes manual and,
advance tells me there is an upstream and downstream O2 sensor...haynes only details the one on the manifold...is there a second one and if so do i need to worry about it?
Thank you all so much for taking the time to read
Steve