Problem with low power at high RPMs

white90sc

Registered User
Hello,
I'm having a problem with my 90 sc aod at higher RPMs when i gun it and it gets around 4000 the check engine light comes on and my car seems doggy, then at 4700 the check engine light goes off and runs great and you really can fell it kick in.

Stuff that i have modded are FLowmasters, ic fan, 10% odp, cold air dam intake, bypassed the coolent tube on the stock troddel body, b&m shift kit, steal ideler pulleys, and i just changed the supercharger fluid, and replaced the iac valve, and Dis.

I would love to here from you guys the is really bugging me!

Thanks,
Jerry



:confused:
 
Any codes pop up before you replaced all those parts?

I wouldn't be surprised if it's a lean condition and your fuel pump is having issues.

have you replaced the fuel filter lately?
 
Well it's either fuel or ignition.

It's odd that it clears up at higher RPM though. Does it seem to have a stumble or miss at the time or is it just a lack of oomph?

If you had an EEC tuner I'd almost think it was a problem with the tables.

Pull the codes and see if it gives you any info.

If the check engine light came on, it should have stored something.
 
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