Diagnostic
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Joined: Jan 2007
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From: Garden Grove CA, '95 Coupe, Black...
Diagnostic
I have only had my '95 coupe for a few weeks. She is a high mileage (160K) car in beautiful shape, but I have no records or history to go on. By the condition I would have to say she was maintained pretty well, and I got a smokin deal.
Anyway, the other day I exited off the freeway from a slow traffic commute, and upon medium to hard acceleration I noticed a hesitation, almost like my foot slipped of the gas pedal. Then it went away.
Tonight I had driven about 30 minutes on the freeway, then was driving at idle speed for about 15 minute in a neighborhood, and while idling, I noticed a little uneven idle. I then shut it down for about ten minutes, then started back up, and upon medium to hard acceleration, it stumbled and almost died, then did that hesitation thing again. I cranked up the RPMs and ran it hard for a few minutes and it went away. Ran another 30 minutes on the freeway home, and it ran perfect. I have had no problems starting either hot or cold. The smog check when I bought it passed with flying colors so nothing weird comming out the exhaust.
Am i looking at the beginning of injector problems? It really seemed to go away when I kinda blew it out. If I had an old Quadrajunk carb I would say it was "loading up" if that makes sense.
Suggestions?
Thanks for your help>>>>
Dan
Anyway, the other day I exited off the freeway from a slow traffic commute, and upon medium to hard acceleration I noticed a hesitation, almost like my foot slipped of the gas pedal. Then it went away.
Tonight I had driven about 30 minutes on the freeway, then was driving at idle speed for about 15 minute in a neighborhood, and while idling, I noticed a little uneven idle. I then shut it down for about ten minutes, then started back up, and upon medium to hard acceleration, it stumbled and almost died, then did that hesitation thing again. I cranked up the RPMs and ran it hard for a few minutes and it went away. Ran another 30 minutes on the freeway home, and it ran perfect. I have had no problems starting either hot or cold. The smog check when I bought it passed with flying colors so nothing weird comming out the exhaust.
Am i looking at the beginning of injector problems? It really seemed to go away when I kinda blew it out. If I had an old Quadrajunk carb I would say it was "loading up" if that makes sense.
Suggestions?
Thanks for your help>>>>
Dan
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It could be an injector problem but I would start with the easy stuff first like the fuel filter. Then I would look at plugs, wires, cap.
If all that fails the fuel pump could be suspect. Good luck.
If all that fails the fuel pump could be suspect. Good luck.
Le Mans Master
Joined: Oct 2003
Posts: 6,130
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From: seattle WA
If you haven't got one get yourself a fuel pressure guage and a digital voltage ohm meter, we'll help you diagnos the injectors. BTW, do you know if it had been sitting, what I'm getting at is the quality of fuel. My favorite fuel treatment and injector cleaner is SeaFoam, but you might prefer Techron, it's also good and doesn't require anything other than adding it to your tank, either one does a great job of cleaning the injectors.
