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Discussion Starter #1
I just did a rebuild and replaced some stock parts with Edelbrock parts. I am getting a rolling idle and I can't figure it out. The idle seems to surge and then fall over and over again. Could it be a air leak? I can't seem to find out what it is but am a totally rookie...... Any help is appreciated!

My set up is
600cfm 1406 Edl carb
Edl perf Intake
Edl Alum perf heads

- Dave

66 GT RagTop
Edelbrock Heads
Edelbrock 600cfm Carb
Edelbrock Intake
 

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Shure, that might be a vacuum leak. To find it, (if that's the problem) spritz some starting fluid around the base of the carb with the engine running and see if the idle picks up. I don't have to warn you to go real easy with this because of fire danger, right? hehe.

Hal
Love hard, drive fast, wear your seat belt.

PS, that's my 'bird...... My Mustang is too ugly to take pictures of yet........*G*.

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Other likely culprits include all of your vacuum hoses, your PCV valve and power brake booster (if you have one). I discovered a cracked vacuum plug when I went through my engine bay. Also had a PCV valve that was in bad shape. Now the car runs great!



Steve Leslie, 65 coupe in restoration. 302, toploader, A/C, disc brakes, bench seat

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What you didn't say was how well the car runs otherwise - and whether the problem occurs when the car is warm, cold or at all times. Steve is probably right about the vacumn leak, but it could be something else - based on your answer to the above questions.

Glenn Morgan 66 GT Fastback 351w+toploader
 

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I purchased a new performer intake manifold for my 351C and one of the carb stud holes was drilled all the way through into the intake passages. I put a good thread sealer on the carb stud to prevent any leaks. This may be causing your problem... just an idea. I also have the 1406 carb. Good luck.
 
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Discussion Starter #6
I just rebuilt an autolite 2100. I had the same problem. After checking for vacuum and not finding any, I found out that the idle mixture wasn't set properly.

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