My SHO STILL has NO low end power, and trouble starting..

[SHO SPD]

I thought it was the EGR, then the fuel pump, NOW I think its plug wires... The car has very little low end power, I cant even break the tires loose turning as sharp as I can... The car has a tough tim starting when it sits fo a couple hours, or so... what do you think it could be? Its driving me nuts, am scared to cross a road its THAT slow on take off... Please HELP!!!

 

[philw349]

You do the TPS? Although it didnt cause that hard of a problem for me, it sure got some pickup after replacing it. I'm looking into plug wires myself for a slight loss of midrange torque that my car previously spoiled me with.

 

[Yamaha V6]

MAF gone bad?

How's the timing? Intake vac leak?

 

[projectSHO89]

Check to make sure the secondaries are closing when you first start the car.

They should open back up around 4K.

If that's not it, run a KoEO and a KOER test to see if the computer sees anything it doesn't like.

Steve
89

 

[jonysho]

I agree with projectSHO89. Mine did that and after a lot of head scratching I finally noticed that the secondaries were staying open. The vaccum cylinder on the back of the intake was the culprit. THis causes ALOT of low end power loss. I was afraid to cross the road to. Almost didn't make it a time or two.

 

[SHO SPD]

Done, it was aweful spark plugs.. BACK on track!!!