[200q20v] how to replace fuel injectors 200q20v

stevequattro at aol.com stevequattro at aol.com
Tue Jul 24 15:12:40 EDT 2001

In a message dated 01-07-24 12:01:53 EDT, you write:

<< 200q20v at audifans.com >>

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 
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

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