Hesitation at running temp.
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
Hesitation at running temp.
Once my engine heats up and I step on it it will hesitate. But only under load if it is in neutral it is fine. I was told this could be my heads. What do you guys think? (L-48) Also, I took out the A/C unit and I need to know the size of the belt that would go from the crank to the fan.
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
Well I've now tried a 36x17(to big), 36x15(to big) 35x17(to small) and a 35x15(to big). There are no more belts left to try and I'm sick of running back and forth to the parts store. Help me please I'm gonna go crazy.
Thread Starter
Safety Car
Joined: Jun 2005
Posts: 3,841
Likes: 0
From: Inver Grove Minnesota
I have a couple but they don't say anything about the belts, just the belt diagram. I took out the Air conditioner so now I need to have a smaller belt that goes around just the crank and the water pump or the fan will slip when I give it gas.
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Drifting
Joined: Jul 1999
Posts: 1,542
Likes: 43
From: Plano TX
I've had 2 HEI modules go bad over 20 years and both were fine when cold but would misfire under a load when hot.
Might try a new module to see if that cures it or borrow one from another car. I always carry a spare since they're not too expensive.
Might try a new module to see if that cures it or borrow one from another car. I always carry a spare since they're not too expensive.
Burning Brakes
Joined: Mar 2004
Posts: 816
Likes: 1
From: Finland
Originally Posted by JoeRags
sounds like you need some carb tuning. could be your bowl levels are too high.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
OK, forget about the heads, that ain't it. The carb and timing needs a bit of tuning which should take care of the hesitation issue. As for the belt, you took out the adjustment part of the belt path when you deleted the ac compressor, you can't run a v-belt without an adjustment. What ou will have to do is rework the belt system to get all the components turning.
what motor do you have?
what accessories are on it? WP, PS, Alt.....
what motor do you have?
what accessories are on it? WP, PS, Alt.....
Race Director
Joined: Feb 2005
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Racer
Joined: Mar 2005
Posts: 473
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From: Champlin Minnesota
Instructor
Joined: Jan 2003
Posts: 179
Likes: 0
From: Burlington Ontario
Originally Posted by JustinD
Once my engine heats up and I step on it it will hesitate. But only under load if it is in neutral it is fine. I was told this could be my heads. What do you guys think? (L-48) Also, I took out the A/C unit and I need to know the size of the belt that would go from the crank to the fan.
