4sphinx20

My 90 mj will turn over good but not fire. I have just replaced the cps (the old one was gunky and frayed wires at the sensor). I am going make the cps mod that cruiser54 has on his page, and test the tps and fuel pressure today. It acts like it's not getting fuel... it has good spark. I spayed carb cleaner in it and it started for a few seconds but with a low rough idle then stalled. My fuel pump is abnormally loud when I turn the key on. Could this be a bad fuel pump? Possibly regulator? I figure the fuel pump filter sock is probably clogged and dirty at least a bit. thanks for any help!... By the way, cruiser54.com is extremely helpful

Thanks a lot. I got the vac line put back together and it fixed the rough idle for the most part, but now it has a high idle. Just one thing after another!Haha hopefully it's just little things

New plugs and wires...maybe a year ago and rotor at least 2 years New plugs and wires...maybe a year ago and rotor at least 2 years ago. I did notice today that the little plastic tube from the throttle body to the map sensor is snapped...could that little guy have something to do with it

I have a 90 mj and when I start it it has a rough idle and kind of a rumble when I open the throttle. I cleaned the throttle body and that helped a little bit. To me it seems like it could be a sensor or valve within the vacuum system...i was thinking possibly the map sensor or egr valve(or solenoid). I wanna try to figure out the problem before I buy parts, because I'm not made of money. Any help is very appreciated. Thanks