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Discussion Starter #1
I have a 77 that I cleaned up the engine compartment and waxed the painted sections of. A week later I was pulling it out for a cruise and it surges at 2700 rpm. Possibly I moved a connection while waxing or water might have damaged something? Any help would be appreciated. I do have the manual, and didn't find anything of help. Maybe someone could steer me in the right direction. Thanks!!!
 

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My 78' would surge at around 2500 rpm. The fix was to adjust the TPS (throttle position switch) See your manual, it's a pretty simple process. Good Luck!

Richard
Woodland, CA
 

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Check the TPS (throttle position switch) Your manual should have the procedure for making the adjustment, it's pretty simple. Good Luck!

Richard
Woodland, CA
 

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I did check both the TPS, and the fuel filter has been replaced. Anyone else? This is even keeping me from taking to a shop to get it looked at. I am at a loss for answers. Thanks!!!!!!!!!!!!!!
 

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Discussion Starter #6
One more thing I noticed is that when it surging, (sounds like the fuel is being completely cut off) when the RPM drops if I floor it, it will backfire through the throttle body. It sounds like the fuel is cut off, then on, then off, etc... but idles great up to 25oo RPM.
 

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Interesting.

What does your fuel pressure gauge (installed between the fuel filter and the fuel rail) read when this happens.

Wayne Monteath
Masham, Quebec.
 
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