[200q20v] how to replace fuel injectors 200q20v

Chris Covington malth at umich.edu
Tue Jul 24 15:38:59 EDT 2001

Well apparently there will be no changing the fuel injectors in this
200q20v EVER.  Everything went well until trying to remove those 5mm hex
screws that mount the rail in, the first one was really torqued in but
eventually came out and the second I stripped.  So now that rail is
permamently in place along with all the injectors as they are.  Damn am
I pissed.

'91 200q20v

> -----Original Message-----
> From: 200q20v-admin at audifans.com 
> [mailto:200q20v-admin at audifans.com] On Behalf Of stevequattro at aol.com
> Sent: Tuesday, July 24, 2001 2:13 PM
> To: 200q20v at audifans.com
> Cc: s-car-list at yahoogroups.com
> Subject: Re: [200q20v] how to replace fuel injectors 200q20v
> In a message dated 01-07-24 12:01:53 EDT, you write:
> << 200q20v at audifans.com >>
> Chris,
> I do not subscribe to the "if it aint broke" business in many 
> cases. This is 
> one of them. I rely on this car to carry my wife and kids 
> wiothout incident 
> and replacing items that I know are possibly or will 
> eventually fail/perform 
> poorly before they do has worked well for me so far. Of 
> course this is on 
> cars that I plan on keeping long enough to enjoy the new 
> parts till they 
> expire.
> When I suspected that my injectors were amiss, I pulled them 
> and sent them to 
> Marren Motorsports for inspection/testing and cleaning. 
> It was very easy to remove them:
> 1. Two allen head bolts (6mm I think) to loosen the rail.
> 2. I removed the rear fuel line from the rail to allow free 
> movement of the 
> rail. The front fuel line had a long enough SS flexible 
> portion that it did 
> not inhibit rail movement.
> 3. Remove the clips at the top of the injector and gently 
> pull the rail off 
> each injector.
> 4. Remove the electrical connection to each injector.
> 5. Gently pull the injectors out. 
> Total time ~ 15 minutes
> Of course I changed the fuel filter as well, add another 4 minutes.
> Marren tested the resistance first to be sure none of them 
> were bad. Then the flow rate and spray pattern were checked 
> on each injector 3x before 
> and 3x after, and then they were leak tested.
> I recieved a print out of all this.
> Three of my injectors had a poor spray pattern, all came up 
> dirty on the 
> reverse cycle, and had a 6.5% diference in min/max flow rate. 
> All injectors had a good spray pattern after their service. 
> Also the flow 
> rate increased from about 2ml/min on the ones that were 
> already clean, to 
> almost 7ml/min on the dirtiest ones. More importantly, they 
> were all within 
> 2% of each other when they were done.
> The car seemed to run and idle smoother. I can't keep my foot 
> out of it long 
> enough to see if mileage was affected though.
> The cost was $23.75 per injector plus shipping and I got them 
> back in less 
> than a week.
> Good Luck,
> Steve Hauptmann
> Columbia, SC
> 200 20v 132,000mi
> stevequattro at aol.com _______________________________________________
> 200q20v mailing list
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