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It's and 89 Z24 2.8L. Fuel injected.
The spark plugs were fine so they didn't change them. Then after the ECM was changed I changed them anyway(it was only $15 to buy six, so I figured what the hell).
The engine light only comes on when the car is warmed up. I'll put it into park, then once it's nice and warm, the fan comes on and the light comes on. It doesn't come on while driving. If I shut the car off and re-start it, the light goes away until it is parked and starts to idle.
I was thinking about the problem being a leaking injector. It might be.
The O2 sensor, it stay's at a steady 900 or 1000. They tried another sensor and it still happened. Then the guy took his out of his car(same make/year) and it still happened. This is when he wired the O2 wires directly together, that seemed to fix it...he said it was good to go.
The block learn reading and the intergrator readings haven't been checked yet(what are they exactly?).
I mentioned earlier about the code. The only one that shows up is 45...and 12 of coarse.
These are some of the repairs that it might be, for code 45(from a quick search online):
-fuel pressure to high
-rich injector
-leaking injector
-HEI shielding(open ignition ground)
-canister purge
-MAP sensor
-leaking fuel pressure regulator
-throttle position sensor
-EGR
Thanks again Fireplug. Like I said it runs fine, it doesn't stall or have any trouble accelerating. Like you mentioned, I'm thinking leaking injector .
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