sputtering at WOT

[v8etr]

My buick has a sputtering problem at WOT. sometimes it wont do it but 95% of the time it does. It has a reds double pumper that is hot wired,accufab regulator ,55 lb injectors, 67 turbo, precision f/m, champ aluminum heads, egt , scan master, rjc power plate 212/212 roller cam, smc alky, I have replaced the coil pack and ignition module and it still did it. any ideas

 

[murphster]

A new MAF cured my sputtering problems at WOT. Seemed identical to you in that sometimes it wouldn't do it. Got a remanufactured one from NAPA.

 

[v8etr]

was yours running good at part throttle up to wot?

 

[murphster]

Yeah, only at WOT did I have any problems. At first I thought it was ignition or fuel related. MAF's aren't that cheap, but I wanted to rule everything out and they are easy to change.

 

[v8etr]

ok I have noticed it does it at part throttle also just though it has about 15lb of boost

 

[v8etr]

any takers??

 

[BlackMagic]

MAF, Plug Wire(s), Spark Plug, loose or cracked vacuum hose (what are your vacuum readings?), flaky TPS sensor, just to name a few

 

[v8etr]

my vacuum is at about 10.

 

[1970gsx]

Check the positive battery cable for shorting between the frame and header when the engine torques over.

 

[v8etr]

I have checked the positive battery cable and it looked good.
could installing the cam sensor 180 out cause the prob????

 

[v8etr]

ok it does it at 4000 rpm???? any ideas?????

 

[MoonroofTTYPE]

Hey

My T TYPE is doing the same thing. The car is smooth when you get up to half throttle and after that it start sputtering. I am gonna start with plugs and wires to see if it fixes the problem. But it seems that all I can get it 15psi of boost. I might try the MAF.

 

[rob nolan]

I was having the same problems with the sputtering but mine would backfire sometimes. I have a casper ground kit on mine and the nut in the box that holds the ground wires wasn't tight at all that fixed my problem. I would look into thegounds and make sure they are tight.