car at idle is reving up and back

01dutchGT · September 9th, 2011, 04:49 PM

I just posted something about my motor surging but I think that was the wrong wording. My motor sitting at idle is revving up to 4k rpms then settles to 600-700 rpms. Then about 2-3 seconds later, it will do it again and keeps doing it. I dont understand why. The motor is running a little rich but that should be the reason. I getting irritated and just need some advice.

What should the vacuum be when idleing? Do I need to put a new gasket on the intake manifold and/or carb?

Its a 302 motor bored 306, b303 cam, long tube headers, high rise aluminum intake, 650 edlebrock carb with electric choke, aluminum heads, roller rockers, electric fan.

RebelTide · October 4th, 2011, 06:21 PM

Call the very helpfull Ebelbrock tec line at 1-800-416-8628. Sounds like a float adj.is required. Good luck.

RebelTide · October 4th, 2011, 06:32 PM

Your vacume should be around 12 with your cam.

1971FordMustang · October 19th, 2011, 03:02 PM

Agreed

September 9th, 2011, 04:49 PM	#1
01dutchGT Regular 1965 Ford Mustang Join Date: Jun 2007 Location: Houston, Texas Posts: 481 iTrader: 0 reviews	car at idle is reving up and back I just posted something about my motor surging but I think that was the wrong wording. My motor sitting at idle is revving up to 4k rpms then settles to 600-700 rpms. Then about 2-3 seconds later, it will do it again and keeps doing it. I dont understand why. The motor is running a little rich but that should be the reason. I getting irritated and just need some advice. What should the vacuum be when idleing? Do I need to put a new gasket on the intake manifold and/or carb? Its a 302 motor bored 306, b303 cam, long tube headers, high rise aluminum intake, 650 edlebrock carb with electric choke, aluminum heads, roller rockers, electric fan. __________________ 2001 mustang gt 5 speed Full bolt ons with 4.10 gears. 1965 Mustang 302 with 4 Barrel edelbrock 600cfm, T5 transmission, Hurst short throw shifter. In the process of restoring it...

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October 4th, 2011, 06:21 PM	#2
RebelTide Newbie 1965 2+2 Mustang Join Date: Jul 2011 Location: Decatur Alabama Posts: 15 iTrader: 0 reviews	Call the very helpfull Ebelbrock tec line at 1-800-416-8628. Sounds like a float adj.is required. Good luck.

October 4th, 2011, 06:32 PM	#3
RebelTide Newbie 1965 2+2 Mustang Join Date: Jul 2011 Location: Decatur Alabama Posts: 15 iTrader: 0 reviews	Your vacume should be around 12 with your cam.

October 19th, 2011, 03:02 PM	#4
1971FordMustang Newbie Join Date: Oct 2011 Posts: 2 iTrader: 0 reviews	Agreed

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