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familyman · 2017-08-30T09:09:22+00:00

YM 1990 will be LH 2.4. Have you checked for codes?

deleted_user_2040

Where abouts do you live familyman

familyman

PM'd

familyman

Hm... My new Haynes manual says 'some models' (handy that) have a service light timer mounted above the throttle pedal which needs to be opened and reset. It's not there on mine. Is there another location it would be, or Australian cars just don't have one?

Just disconnected the battery to reset any fault codes too.

Major Ledfoot

familyman;135571 wroteStill running rough and the lambda-sond warning light on the dash is still on.

Check for codes. There may be more than one code, and more than one cause.

And sometimes it will throw codes when something else is amiss, e.g. Paul's car was throwing an o2 sensor fail code before he left town on Thursday, and he found corrosion on the AMM terminals when he got her home.

AFAIK, OZ cars don't have the service interval timer.

jamesinc

There shouldn't be enough soot to foul a new sensor immediately. To clean it all out you'd need to thrash the car a bit and get the exhaust nice and toasty.

familyman

bgpzfm142;135615 wroteCheck for codes. There may be more than one code, and more than one cause.

Ok, pretty sure the AMM is open circuit. Would that light up the lambda sond dash light?

* Probe in socket 2, press button once: 1-2-1 (Faulty signal to/from Air Mass Meter). No additional codes.

So I pulled the AMM, cleaned it with AMM spray, and only once it was clean I could see the delicate wire is open. Is it meant to be unbroken?

i.e. It looks similar to the inside of an incandescent light bulb, where the thin wire comes out one side, is then strung between two points, and goes back in on the opposite side. Between the second attachment point and where it enters the body again, it's cut - like the broken filament of an incandescent light bulb would look.

Major Ledfoot

Yes - AMM fail will bring on the CEL / Lambda light.

Yes - The AMM wire is meant to be unbroken. See pic.

It shouldn't need spraying, since the ECU runs the temp sensor wire hot to burn any soot off of it.

jamesinc

They do occasionally seem to benefit from a clean though. Not everything burns off easily

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