[V8] Testing Fuel Injectors, stumble, miss

[Korn, Bob]

I have a laptop now, I have yet to get the VAG-CoM software or cable.  Put
on the To Do list.............................
There is only one place to get this if I remember.  Have to look over my
archives.

Bob


-----Original Message-----
From: dsaad at icehouse.net [mailto:dsaad at icehouse.net] 
Sent: Monday, March 08, 2004 9:52 AM
To: v8 at audifans.com
Subject: Re: [V8] Testing Fuel Injectors, stumble, miss


One trick I have used is to unplug the O2 sensor. This should force the ECU 
into a failsafe openloop mode. If your surge goes away, you can assume you
have 
some sort of mixture problem. If it does not, maybe ignition problem or
erratic 
fuel pressure or ???

Mine seems to run pretty good with the O2 sensor unplugged. Mileage and
power 
are probably reduced but it runs smooth.
Do you have access to something like VAG-COM? That may give you some clues
too.


Dave


Quoting "Korn, Bob" <Bob.Korn at Fike.com>:

> Anyone know an easy way to test fuel injectors or is this a job for 
> someone who has the proper test equipment?
> 
> I've done the test using the ECU and they all buzz or click 
> accordingly. Pulled them all and replaced the seals and caps, used the 
> NAPA kit that crosses to a ford previously mentioned on the list. The 
> caps are slightly different, had to modify slightly before 
> installation.
> 
> Still have a miss or stumble under steady acceleration.  Could a bad 
> fuel pressure regulator cause this?  I do not have a pressure gauge
> set......yet.
> May have to bite the bullet and go buy.   Getting frustrated, been
> chasing
> this one for awhile.
> 
> New plugs, caps, wires, rotors, and Fuel pressure reg 25K ago. Since 
> miss started: Techron through two tanks fuel, always AMOCO Premium.
> New O2 sensor
> New fuel filter
> New breather hoses
> New seals on injectors
> 
> Any ideas???
> 
> I keep thinking fuel with all the new ignition components. Guess you 
> never know, better go back and check spark in all the holes.
> 
> 
> Thanks,
> 
> 
> Bob
> 90 V8Q 135K Pearl
> 
> 
> 
> 
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