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sand_man sand_man is offline
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Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,758
Question CIS air/fuel flapper is is down

Need some advice before I tear into it. Was cruising home from work tonight, and I could tell the car was about to die...gave a hesitation, and I could tell as soon as I took my foot off the gas she'd be dead. So I coasted into a parking lot.

From what I can tell, the fuel metering flapper plate is binding. It doesn't have that "feather touch" to make it move down - takes some force to push down. The car runs VERY ROUGH. Will not idle. Sounds a little bit like it's backfiring through the intake.

I have the following CIS mods:
-Imagine Auto modified fuel head
-Brian Leask WUR
-Brian Leask RPM solenoid
-No smog equipment
-no AAV
-Aftermarket air air box

I checked to be sure that the AFR adjustment spring/screw wasn't binding on my air cleaner, and it's not.

Any ideas? What would cause this? Car was running beautifully.
back in the saddle: '95 993 - just another black C2
*SOLD*: '87 930 GP White - heroin would have been a cheaper addiction...
"Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP)
Old 08-27-2007, 05:18 PM
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