Hesitation/lack of power
 

Looking for some ideas on the cause. Car is leaving very lazy and has a hesitation at the hit of the throttle. It cleans up and runs strong after about 4,500 in first gear. Tried a spare carb, but unsure if it was good or not, and had the same results. Swapped converters to a known good one and replaced the ignition coil. The fuel pressure is staying steady at 7 1/4. The car is a 72 454 Corvette running in C/SA. The motor is fresh/new and was dynoed. Neither my carb or igntion were part of the dyno testing. Both sat for about a year without usage. Let me know if you have any ideas on what to look for/test. Thanks

Norm Webber

Re: Hesitation/lack of power
 

Try the fuel pressure at 6 psi for starters. Trans oil level is OK? If you use a 2 step change the 2 step module. Had one go bad when we had our Malibu stocker causing same grief.

Re: Hesitation/lack of power
 

Fuel sloshlng over?

Re: Hesitation/lack of power
 

No on the fuel sloshing as it will act similar in park stabbing the gas. Checked the fluid and it is ok. I tried leaving without the two step and had the same results. I will try the fuel pressure on the next run. Thanks for the ideas

Re: Hesitation/lack of power
 

Squiters doing as they should? Good flow out of both sides? Rear air flap OK?

Re: Hesitation/lack of power
 

Check the accelerator pump gasket, they dry out from sitting especially after using VP fuels. Chased that for a while once.

Re: Hesitation/lack of power
 

Described hesitation is usually too much or too little fuel. Too much and you'd get a black puff when it finally picked up. Too little and it's just a dead spot. I'd bet too little. I'd start by dissembling carb and cleaning thoroughly.
What carb does it have?

Re: Hesitation/lack of power
 

X2.............Sound like Carb.

Re: Hesitation/lack of power
 

how much timing are you using? where is your total set at ?what rpm? just curious

Re: Hesitation/lack of power
 

Change the coil wire!