Classic Audi Technical Mech/Tech Engine » Ur quattro will not turn over with key

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Old 02-01-18, 05:52 PM   #11
Colin Aitchison
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To carry on from my last post that ended " onward and upward in 2018 ", The three wires down the drivers side clipped to the inside of the chassis leg turned out to be four wires, with coloured plug , red, yellow, blue and white, after disconnecting then and reconnecting them the starter now has 12.5 volts at the solenoid wire and the engine now turns over, the four connectors all had corrosion on them, now the engine turns over I also have a spark, now for fuel, the fuel injection pump relay has been removed as not to complicate things with a fuel leak and trying to confirm that I have a spark, fitted a jumper wire across the two large terminals in the fuse box where the fuel pump relay is fitted, and the fuel pump runs and for a wee change no fuel leaks, so turn it over and it should fire up, No, after a couple of 10 second turning the engine over it was time to remove a spark plug, and it was dry, so no fuel getting in to the engine, refitted the spark plug, removed cylinder number 2 fuel injector and sat in in a jar on top of the cam box, removed the alloy dome cover to access the air meter flap, bridged out the fuel pump relay and raised the air meter flap with my finger tips, got about 5mm of fuel (4 -5 year old fuel) in the bottom of the jar, replaced the fuel injector and alloy dome cover, now if I was correct cylinders 1, 3, 4 and 5 have 5mm of fuel in the bowl of the piston, foot on throttle 1/2 open and turn the engine over and with a puff of black smoke she is running on 5 cylinders and idles, removed the fuel injector jumper and refitted the relay and now starts from the key, no coolant in engine and 20 seconds was about the maximum run time, but in all two little faults due to not been run for 4-5 years seem like a result to me, thanks for all your help, may have to make up a for sale sign.
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Old 02-01-18, 06:01 PM   #12
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Quote:
Originally Posted by Hanuman View Post
It's amazing how many problems can be fixed by unplugging and reinstalling connections.
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......after disconnecting then and reconnecting them the starter now has 12.5 volts at the solenoid wire and the engine now turns over
A nice result.....you can't beat a cheap fix!
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Old 02-01-18, 06:04 PM   #13
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Similar issues used to plague many of the systems I used to support in my old career.
........are you not piloting the paraffin budgies any more??
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Old 02-01-18, 06:55 PM   #14
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........are you not piloting the paraffin budgies any more??
Boeing jockey now, was an electronics bodger for a previous and for a brief time, parallel career until the end of last century. I can just about remember ohms law, but am fully conversant with Sod's law in both industries.
I still use the former skills set, a unique set of skills he said, for tinkering with jalopies.
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Old 02-01-18, 08:16 PM   #15
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Great stuff Colin, well done mate !

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Old 02-01-18, 08:38 PM   #16
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Colin.
Would you still need/like the circuit diagrams? I did start scanning, but stopped.
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Old 02-01-18, 08:57 PM   #17
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turn the engine over . . . . . . . . . and now starts from the key
Great to hear Colin.
Just read through this thread with interest. Logic, patience and persistence prevails!!! Along with forum power of course.

Happy to hear another I5 is alive and well
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Old 02-01-18, 09:50 PM   #18
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Hanuman, If you don't mind can please email me the correct wiring layouts for the Ur 1985 car, just when you have time no rush, thanks.
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Old 02-01-18, 10:05 PM   #19
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Sure, no worries
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Old 02-01-18, 10:10 PM   #20
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Good result today but i can't help but wonder why the big clearout?
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