1988 Audi 90 Fuel/Ignition Issues

I have continually had problems with my 1988 audi 90 5 cyl fwd... here are the symptoms...
Ingine idle is not correct.. sometimes idles @ 800, sometimes, barely
enough to run, some time as much as 1200-1500.... and the idle also bounces up and down (this i know is an issue w/ the Idle stablizer, but i recently replaced the idle stabilizer...) When Accelerating, if i push the gas pedal too much, the car loses power and barely accelerates at all... I have to carefully give the car gas so i can get up to highway speed... I also have to shift rather earlier because if the engine revs to high (an that isn't very high at this point) i lose power..
This is what I Have done already:
New fuel pump & Filter Replaced idle stabilizer w/ used item Changed spark plug/cap/rotor/wires New Air filter Checked vacuum lines and repaired/replaced where necessary... No leaks found. Adjusted timing New o2 sensor
I am at a loss at this point... I really have no idea where to go at this point.. is there anything else i should look at that would create the power robbing experience?
Thanks for your help
Kevin
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Sounds like you changed a lot, but did you check things before replacing? Did anything you replaced help?
It might be sensors or wiring issues for the fuel injection, such as ground wires or throttle switches. Or throttle linkage issues. Do both throttle plates move freely and rest at their stops?
Got Bentley and a digital multimeter?
just my $0.02! Good luck! :-) later, dave Reminder........ Before you criticize someone, you should walk a mile in their shoes. That way, when you criticize them, you are a mile away from them, and you have their shoes. Frieda Norris
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I also saw some of the same problems you mention here before I found a bad ground connection on my 1985 4000Q. I also found it with a Bentley manual and an Ohm meter. You might just try unscrewing the ground connections you can find in the engine compartments (mine were right around the battery screwed to the chassis) and clean them with a wire brush before re-connecting them.
I know that all kinds of things started working better after I did that.....idling, running, meters and guages, and some tune-up parameters that had never quite been right.
Gene

ground
at
way,
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Thank you very much to both the respondants.. I will try to check my electricals this weekend.. is there any specific things i should be testing? and when i do test them, what am I looking for.. i have the bentley and my multimeter.. no problem.. i'll start w/ from the ground... and work my way up!.... (thats auto repair humor).... ok.. Thanks again!
Kevin
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