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Old 05-14-2014, 10:55 PM   #3
DOCTORBILL
Geo Metro Lover
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Join Date: May 2005
Location: Eastern Washington State, Washington
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Re: '93 Geo Metro Problem - Intermitant and Enigmatic

Seems like every vehicle I have EVER had eventually starts the Intermittent rubbish.

Auto repair places love them ! Their solution is (obviously) to want to start replacing all the parts with new and make a killing on me.

Wouldn't only some PARTICULAR wires be the problem ?

Not every wire connection would cause this missing if disconnected.

My engine is all oil covered (leaking Rocker Arm Cover Gasket) and just touching
anything in there leaves me sporting BLACK GREASY hands.

Playing the guessing game, I wondered what symptoms a bad TPS would have.
That is a potentiometer and the Carbon Pad that the arm touches must get worn
where the throttle is at most often.
If I connect a VOM and measure Ohms, then turn the shaft, maybe I'd see the resistance drop off on a worn spot.

I have been wracking my brain trying to rationalize what the problem could be !

Probably some stupid loose connection deep in the wiring harness beneath layers of sheet metal.
This Metro is 22 years old now. Served me well. But getting long in the tooth !
Bad wiring is awful to deal with. My frame is corroded from the salt here in winter.
Could corroded frame welds make this happen ?
Is there any way to ground the engine block directly to the computer ground wire and bypass the frame ?

I WILL take your advice (on the chat room a while back) and see what the compuker says with a fuse in the diagnostic slot.



DoctorBill
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