[urq] hesitation, bucking on takeoff - not resolved yet!

[Ben Swann]

New pump, wiring good, used di-electric greas on terminals and they are 
tight and sealed.  I rapped on the pump and got no unusual noises.

Pump is relayed and jumpered on with the key, so not likely getting any 
cutout.  If anything, I'd expect it is jamming.

Ben
----- Original Message ----- 
From: "John Sherrow" <jsherrow at verizon.net>
To: "Ben Swann" <benswann at comcast.net>
Cc: <quattro at audifans.com>
Sent: Wednesday, October 19, 2005 9:27 PM
Subject: Re: [urq] hesitation, bucking on takeoff - not resolved yet!


> My lone experience with bucking was fuel cut out. The fuel pump wires had
> come loose at the pump!! I vote fuel related.
>
> ----- Original Message ----- 
> From: "Ben Swann" <benswann at comcast.net>
> To: <audi at humanspeakers.com>
> Cc: <urq at audifans.com>; <quattro at audifans.com>
> Sent: Wednesday, October 19, 2005 8:45 PM
> Subject: Re: [urq] hesitation, bucking on takeoff - not resolved yet!
>
>
>> I understand what you are saying, but as I have swapped out both ECU and
>> ignition control module, I don't suspect timing.
>>
>> Ben
>> ----- Original Message ----- 
>> From: "Huw Powell" <audi at humanspeakers.com>
>> To: "Ben Swann" <benswann at comcast.net>
>> Cc: <quattro at audifans.com>
>> Sent: Wednesday, October 19, 2005 8:18 PM
>> Subject: Re: [urq] hesitation, bucking on takeoff - not resolved yet!
>>
>>
>> >
>> >> Hall must be in window for car to run - timing is not adjustable.  I'm
>> >> pretty sure it is dead center of window, but wouldn't hurt to double
>> >> check. I doubt this has anything to do with problem.
>> >
>> > So on your car the computer runs the timing based on the flywheel pin
> and
>> > sensor, right?
>> >
>> > Still, I'd be curious what a timing light shows... especially if you 
>> > can
>> > somehow measure it while the problem is occurring (elves in the engine
>> > compartment while driving?  can you make it happen against the brakes?)
>> >
>> >>> You don't mention checking this, so I'll suggest it (since the
> symptoms
>> >>> could fit the diagnosis) - how is your ignition timing?
>> >
>> > -- 
>> > Huw Powell
>> >
>> > http://www.humanspeakers.com/audi
>> >
>> > http://www.humanthoughts.org/
>>
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>