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Cut out and running rough.

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Old 01-22-2021, 06:10 PM
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Whitesands
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Default Cut out and running rough.

1988 S4 322,000 miles.

This happened awhile back, as I was turning into my drive the engine cut out, I tried to restart it, it would start and then cut out after a second.

I left it for awhile and tried again, it would start and just about idle, if I touch the throttle it just dies, if I’m very careful on the throttle I can get it to 2,000rpm but no more, it just wavers like on a throttle limiter.



I’ve tried it a couple of times since with the same results.

It was running fine before and I’ve not done any work on the car recently.



It had a rebuilt MAF in 2007, rebuilt LH ECU in 2011, new fuel pump in 2018.

2 videos.









Any suggestions or ideas would be welcome.



Ivan.

Last edited by Whitesands; 01-23-2021 at 06:10 PM. Reason: Missing word.
Old 01-22-2021, 06:26 PM
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FredR
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Try puling the plug off the MAF and see if it does the same thing or something different for better or worse and advise what you find happens.
Old 01-23-2021, 05:13 PM
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Whitesands
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No difference Fred.

Old 01-23-2021, 06:36 PM
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FredR
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Originally Posted by Whitesands
No difference Fred.
That being the case suggests either a problem with the MAF or issues with the wiring in/around the plug.
Old 01-24-2021, 01:01 PM
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Mrmerlin
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take your LH and EZK and MAF put them into a good running car do one at a time
Old 01-24-2021, 07:43 PM
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Whitesands
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Stan, nobody near me that I know of.

I could mail them to someone for testing but don’t know who. Roger? 928INT? Etc.
Old 01-24-2021, 08:08 PM
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Mrmerlin
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Post a service question and your location
Old 03-24-2021, 01:53 AM
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Whitesands
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Default Update

Have done the following with no change.New MAF

Computers checked

Fuel pressure checked

Coil resistance checked

Ignition amps swopped

Temp2 sensor checked

14 pin plug cleaned.
Old 03-24-2021, 02:31 AM
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Geo1965
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Check distributor caps and rotors first, spark plugs after. Crankshaft position sensor next.

Good luck

George
89 S4 Auto



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