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Cold Start Backfire

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subtlt

A little faster every day
Joined
May 25, 2001
Messages
98
This is starting to bug me, and I'm sure it's not good for the car either.:mad:

For the last few weeks my GN has consistently backfired when starting up in the morning. 4 out of 5 times it'll start right up afterwards and run fine, 1/5 it'll run like it's on 5 cyls for a minute till it clears up. FWIW, it seemed to start when the temp dropped into the 50s from the 70s.

I've dug through the archives with little success. I did find a recommendation to check the CPS, so I reset the clearance on that to .025, but no joy (stopped the ticking though!:) )

From what I've read, either the coolant temp sensor is sending a temp that's way off, I have a sticky valve, a leaking injector, or some combination of the above.

I'll throw T-link on it tomorrow morning to check the temp sensor, try some "valve unstick" additive, but if that doesn't work, what's next?:confused: I had the injectors cleaned a year ago, so they SHOULD be OK.

Anything else I should check?
 
Get a fuel pressure guage and see if the pressure bleeds down. A leaky injector will bleed down perty fast. Also theyre 17 years old if stock injectors.

I'll start with this.
 
I would make sure the cam sensors didnt get loose, my car backfires when that is off.
 
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