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KTL KTL is offline
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Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,210
.........or not enough fuel.


Can't remember if you were the one who previously had problems with the reference sensors or the cyl. head temp sensor. Look at the reference sensors to see if the wiring is good- this is how they go bad. Sheathing splits and wires get contaminated.

Injectors seem unlikely if Techron doesn't make much difference? But, a problem that progressively gets worse like this could be due to injectors. To satisfy your injector theory, start by removing and reattaching each injector lead one at a time to see how that changes the characteristics of the motor. Pull one wire off, see what that does, reconnect it and move to the next and do the same.

O-rings are not likely to be the problem, but the injector(s) itself. Bad o-rings would be a noticeable smelly leakage problem. You gotta pull pretty hard to get the rail off the manifold, so be ready. Just make sure you have all the screws out........there's no maybe here. Don't gorilla with the rail too much or you can disturb that pesky main fuel line that goes under the manifold. You don't want that sucker to start leaking. $300..........

After all your fuel issues are satisfied, don't rule out the airflow meter. I kinda remember people saying this bugger can cause driveability problems when not operating right.

Check the basic stuff. Air, fuel, spark.

This just came to mind..................... Check for keywords like injector or whatever with Kurt B username. I remember him having a problem similar to this???? Worth a shot.
Kevin L
Present: '86 Carrera, '79 911SC widebody conversion rolling racecar shell
Past: '87 Carrera

Last edited by KTL; 01-30-2004 at 02:15 PM..
Old 01-30-2004, 02:13 PM
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