Join Date: Jun 2003
Location: Chula Vista, CA
High RPM upon startup
Hope someone can give me some advice on a High Idle problem.
History: My Chevelle has a 355, MSD 6 HEI, and now, a Edelbrock Performer Dual Quad manifold and carb kit. The car was running perfect beore, but I decided to take it a step further by adding dual quads instead of the singel carb setup I had before.
I know, if it aint broke, don't fix it. Someday I'll do just that.
When I start the car now, it quickly jumps to about 3200 RPM. I kick the accelerator pedal, but it just increases the RPM and settles at 3200 again.
I don't keep it running more than a few seconds because of fear of damaging the engune.
I have cked the vacuum ports for leaks, and throttle linkage for binding, fuel pressure, etc, all were fine.
The only thing I have not been able to ck is the electronic choke for good voltage. Could a nonenergized choke cause this problem?
I have not adjusted or changed any of the factory settings of the carbs or choke.
If someone could give me some basic things to ck, I'd appreciate it. I changed the timing by a hair to see if it changed the symptoms, it had no effect.