1991 Mitsubishi Eclipse Fuel system

ZIGZAG20

MEMBER
1991 MITSUBISHI ECLIPSE
4 CYL
FWD
MANUAL
23,100 MILES

My Eclipse seems to have a problem with the fuel system, I've gotten several different possible causes, but with the age of the car, I'm not inclined to go with the "process of elimination" approach.
What it's doing is, it starts and idles rough for the first few minutes of the the first start of the day, then after that, it runs fine for the rest of the day. However, after running fine for a day or two, it won't start again for a couple weeks, then the cycle repeats. The possibilities I've heard are fuel filter, fuel pump, fuel rail, fuel relay, and temperature sensor. The check engine light burns constantly, however the only place in town that services imports wants $150 just to put it on the diagnostic computer to get the code, and if it IS something as simple as the fuel filter or pump, I really don't want to spend 150 to find that out unless I have to. PLEASE HELP!

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Get a repair manual and test the fuel pressure and coolant temperature sensor yourself and comeback with the readings

Was this

answer

helpful?

Yes

No

Monday, June 16th, 2008 AT 5:29 PM

ZIGZAG20

MEMBER
2 POSTS

So far I've replaced the fuel filter, plugs, wires, cap, rotor button, coolant temp. Sensor, and all 3 sensors mounted on the throttle body, and the roughness has improved dramatically, however, the check engine light still burns, and now after running for a little while, I'll hear a "click" sound from behind where the stereo should be, and when that click hits, the car shuts off, like right now, then won't start for at least 20 minutes, then it'll run fine for a few, then "click". Dead again. Could that click I hear be the fuel injector relay malfunctioning?