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Volvo causing pain 900

posted by  jjb on  Sun Jul 25 02:24 CST 2004
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last visit: Tue Jul 28 13:57 CST 2009
[RELATED]

Thanks for everyones suggestions, keeps me thinking of things to try and sooner of later the problem will poke its head up.

I'm not sure how but the car ran lake a champ for about 1 hour of drive time yesterday and then failed with the no acceleration symptom (had to pull off the road and hobble home).

To get it to run decent I disconnected the IAC electrical connection and, although it ran rough, it did accelerate. After that I connected it back again and it ran for a while with no problem except for a slight high idle in park only. The idle in gear was spot on. After about an hour of drive time I stopped at a friends for a moment. Got back in the car to leave and sure enough the problem resurfaced. Hobbled back to his house, disconnected the IAC and the car ran fine all the way home (about 14 miles).

If the timing would have slipped, would the car miss frequently? When it runs well as above, there is no miss.

I'm electrical fittings on the harness and IAC look fine. I wonder if the ECU is going bad.

Oh yeah, the ABS light is now intermittently coming on. This started after I installed the overdrive relay....ugh!

Thanks folks! you guys are getting me smarter about this.

I don't think the garage ever cleaned the throttle body although the did put a throttle positioning switch on. Should I clean the throttle body?





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