washed engine,now problems
- Thread starter 94GTCoupe
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I test them on a hot motor with it idling. It's safest to do at the EEC. Set your DMM to DC Volts and look for the signal to oscillate from 0.1 to 0.9V quickly. You have to test one at a time.
Matt's got a good idea with the concrete and the wiring. On my car, the O2s are tucked above the K but I think they're normally more out in the open.
Matt's got a good idea with the concrete and the wiring. On my car, the O2s are tucked above the K but I think they're normally more out in the open.
May be a coincidence, but I washed my car one day and sprayed the underside of it. Had the same kind of issues and actually pulled a code (not sure which one now) for one bank running lean. I replaced the 02 sensor on that side and all was good. Hopefully it fixes your problem too.
Adam95GT
New Member
I would caution to make careful recordings of exactly what you change on the idle (number of turns on the stop-screw or the bleed-screw). This issue is happening because something is malfunctioning and once it's resolved, you'll need to take your idle back to where it was previously. Knowing you can get that exact setting back removes a lot of variables if another or future issues crop up (or it confirms that you fixed the exact issue).
I created a lot of headaches for myself on carbed stuff by not recording idle and jetting settings and this is not all that different (or worse because the EEC will try to adapt, even if things are a bit off).
I created a lot of headaches for myself on carbed stuff by not recording idle and jetting settings and this is not all that different (or worse because the EEC will try to adapt, even if things are a bit off).
BlackVert
15 Year Member
sounds to me like the idle air control valve is sticking open.
that happened to mine a while ago, it was weird because sometimes it would stick open and do what you are describing, other times it would stick closed and then i'd have to keep a little throttle on it to keep it from dieing.
i think a new one was around $40, but that was probably 4 years ago now ...
that happened to mine a while ago, it was weird because sometimes it would stick open and do what you are describing, other times it would stick closed and then i'd have to keep a little throttle on it to keep it from dieing.
i think a new one was around $40, but that was probably 4 years ago now ...
Adam95GT
New Member
sounds to me like your 02 was the problem.... it fixed your problem it just needs time to adapt... drive it a little b4 you go fiddling around with things...
replaced the tps,it was bad.
got it idleing perfect,650rpm.
drove it about 1 1/2 mile,perfect.
cleaned up,took about 15 mins.
drive home.
about 1 1/2 in,check engine light,running rough
get home and pull codes
172-no HEGO switching detected,indicates lean (right)
177-HEGO shows system always lean (left)
542-fuel pump secondary curcuit failure,PCM to ground
i'm open to all sugestions.
:SNSign:
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