When it starts, the engine runs smooth but it's super rich. The first time i start it, it will run for a min or two, then studder and die. After that, it will run and idle fine at 800 and run forever but it runs so rich, there's fuel coming out the back of the exhaust. Sometimes when i rev, it will stumble, but quickly catch up and rev freely, then when i let go it will studder a little sometimes and then go back and idle. It won't rev past 2000-2500 rpms at all. Everyone tells me it's a bad MAFS or the wiring.
It will drive around as long as I don't give it any throttle. If it do it will buck and hesitate.
Info. you might be able to use to help me figure this out:- My gauges aren't installed but I connected my boost gauge and it reads -16 at idle- I've gone over my IC piping over and over and it's all tight. I doubt there's a leak. I installed my BOV last night, but before that, i had the hole on the hotpipe blocked, so i know that's not the problem.- I also unhooked each coilpack one at a time to make sure each cylinder is firing. Unplugging each coilpack had the same results, so I know they all should be firing.- Before the engine went in, I installed pregapped Denso iridium plugs, and I checked the timing by setting cylinder 1 to TDC and lined up the CAS. I didn't have to reset the CAS because when I pulled the valve cover, the CAS looked like the instructions I have to set the timing manually.- I checked over the wires I extended and they are fine. I don't know how to test my MAFS but I checked for continuity between the ground wire on the MAFS and the chassis and I got nothing(this has me thinking, how do i check the grounds?)- While I checked the MAFS wiring, i checked the o2 sensor wiring also.- My ECU is wired up but not mounted in the kick panel yet. Does that cause any problems? I took a ground wire from the ecu case to the chassis, because i thought the ECU may need to be grounded.- First I cleaned the SR MAFS, no luck. Then I picked up a used SOHC MAFS and wired that up correctly using the SOHC connector. That didn't work, last night i cleaned it, and tried again, no luck.
Does anyone know the procedure to check an S13 blacktop's ground connections, the TPS and the MAFS? I can't find anything at all by searching.Also, what's the procedure to reset the ECU? I disconnect the battery cable for a while hoping it does. How long would it stay in it's limp mode in this case? Until the problem goes away, or until the ecu is reset??
Any help would be greatly appreciated, i'm stuck on this.:help :help
