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Re: 1988 Audi 90 engine/fuel problem.
Audi Audi Automobiles Discussions (alt.autos.audi)
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#1
 
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Re: 1988 Audi 90 engine/fuel problem. -
06-26-2003
, 12:36 AM
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Hopefully someone can give me some ideas on how to proceed with this I have a 1988 Audi 90 5 cyl (fwd) and my engine runs pretty crappy... The timing is good, i replaced the wires, plugs, cap and rotor. I have run fuel injector cleaner through it a couple of times. The problem is that the car idles very low (500 rpm or less), and the exhaust smells pretty harsh.. not oily, more like it does not seem to be the right mixture.. the timing is good, as i recently suspected that was the problem and re-timed it, and it was one problem.. the distributor was firing a few degrees early.. But despite fixing this, the car still runs pretty bad.. I have good accel, but when idling, it is very low and when i accel i get a bit of smokey exhaust.. it does not really look like it is oily, looks like its not burnign the gas very well. I don't know if the o2 sensor is good, i am going to check that next, there are no leaks in the vacuum system as i had one, and fixed it. and the car has pretty low miles (119000) i bought it with 108000.. Any thoughts or suggestions you may have i'd appreciate... thanks a lot kevin |
#2
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Hopefully someone can give me some ideas on how to proceed with this I have a 1988 Audi 90 5 cyl (fwd) and my engine runs pretty crappy... The timing is good, i replaced the wires, plugs, cap and rotor. I have run fuel injector cleaner through it a couple of times. The problem is that the car idles very low (500 rpm or less), and the exhaust smells pretty harsh.. not oily, more like it does not seem to be the right mixture.. the timing is good, as i recently suspected that was the problem and re-timed it, and it was one problem.. the distributor was firing a few degrees early.. But despite fixing this, the car still runs pretty bad.. I have good accel, but when idling, it is very low and when i accel i get a bit of smokey exhaust.. it does not really look like it is oily, looks like its not burnign the gas very well. I don't know if the o2 sensor is good, i am going to check that next, there are no leaks in the vacuum system as i had one, and fixed it. and the car has pretty low miles (119000) i bought it with 108000.. Any thoughts or suggestions you may have i'd appreciate... thanks a lot kevin |
#3
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Could be number of things but the first that occur to me are: - Replace fuel filter - Replace air filter - Not sure if the 90 5 cyl has ISV like mine but if it does, take apart and clean with brake cleaner. Also check the idle switch on the throttle body to be sure that it is telling the ISV to operate. - Really sounds like leaky injectors. |
#4
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check idle stab. control. when my car had a similar problem , unplugging it worked temporarly, however engine runs at 1200 + rpm. spark plugs, and compression good. ? check fuel distro plate movement ? Don't know the exacts of your car, but if its a similar 5 cyl as I have, those are some places to start, hopefully someone can help you more than I . - Jonathan kevin |
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