Quick easy questions on bad fuel pump symptoms. - Club Touareg Forums
 
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post #1 of 7 Old 10-03-2015 Thread Starter
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Quick easy questions on bad fuel pump symptoms.

Read through dozens of pages on the fuel pump issues. Couldn't elicit straight answers from any of the posts. Was hoping for some clarification.

My Touareg sputters and dies after 30 seconds. After the priming pump turns off. Leading me to assume the main pump is dead. On an 04 v8, passenger or drivers side is the main pump?

My mechanic friend seems to think this is a immobilized feature. I insist fuel issue. Mainly because I just replaced my main battery two weeks ago and because my MFI is saying the fob battery is dead despite being brand new. Thoughts?

If i start it and give it gas before 30 seconds it drives fine but dies as soon as I let off the gas.

Touareg will start right back up without issue right after it dies. But dies right at 30 seconds.

Lastly, to order the parts, just to make sure. I really only need the main pump. But I'm best off replacing both? If I do replace both, I need both left and right pumps, and the separate $100 sending unit/ filter correct?

Thank you gentleman!
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post #2 of 7 Old 10-03-2015 Thread Starter
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So plot twist. I accessed the relay panel on drivers side by the firewall. Pulled the 404 relay towards the front of the car which I was told controls the power switch OFF to the priming pump. The car stays running now and can drive without stalling. I guess just running off the priming pump alone.

So now I assume the main pump is bad. Is that on the drivers side or passenger side? I'm a little strapped for cash right now so I plan to replace the bad pump and the filter/ sender asap, the priming pump when it goes bad.

Any idea which is the main pump and which is prime?
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post #3 of 7 Old 10-04-2015 Thread Starter
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anyone know if the drivers side or passenger side pump is the main running pump?

checked for codes, only one code pulled, a code for stalling. All else appears to be working as it should. Weird.....
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post #4 of 7 Old 10-04-2015
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Hope this helps, Mind you ELSA Win does not give too much information as to which pump is "primary" or "Secondary". It looks like they are working in parallel.

Stuart...
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post #5 of 7 Old 10-04-2015
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Drivers side pump primes and starts, Passenger side pump is main running pump

07 V8 FSI, Campanella white, steel suspension(wife's)
07 V8 FSI, Campanella white, Air suspension, hitch, keyless start, center & rear diff locks 265/70R17 M+S (mine)
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post #6 of 7 Old 10-04-2015
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Search fp, go to Fredie fuel pump post #18 by Touaregchitown, good luck

07 V8 FSI, Campanella white, steel suspension(wife's)
07 V8 FSI, Campanella white, Air suspension, hitch, keyless start, center & rear diff locks 265/70R17 M+S (mine)
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post #7 of 7 Old 10-14-2015
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Quote:
Originally Posted by hedditch View Post
Hope this helps, Mind you ELSA Win does not give too much information as to which pump is "primary" or "Secondary". It looks like they are working in parallel.

Stuart...
Seems the primary and secondary labels cause confusion.

The priming pump behind the drivers seat is in the primary side of the fuel tank (larger size). The pump that runs the car after 30 seconds behind the passenger seat is located in the secondary side of the fuel tank (smaller size) . Believe the labels have nothing to do with pump function but rather location in the funky not quite U shaped fuel tank.
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