This is an L98 in a friend 's 1988 Corvette I'm modding for him.

He has a 3.73 gear,stock trans&converter, stock motor,just some minor free mods.

From a dead stop, it pulls like crazy to 3,000rpm and then has a bad hesitation and then starts pulling to 5000rpms.

We just did plugs and wires,ported the plenum,AFPR and t/b bypass. It started this before any of these mods.

I have no clue what could cause this?

 

So does the power come back at certain rpm? If not and it hesitates you may want to check the injectors with an ohm meter. They should all be really close in resitance. Also check the volate of your tps.

 

The weird thing is it only does this in 1st gear. The power comes back full on after it recovers from the stumble.