[Robert A. Warof]

I have a '91 VR4 w/ APEXi AVC-r (see sig for all mods) and from a cruising speed if I downshift into 3rd and push hard it misses at around 5k. It doesn't do this if I run hard through the gears from a stop. I have done the fuel pump by-pass (thanx everyone for that info) and that seemed to help a little. Any Ideas on how to fix this would be greatly appreciated.
Robert

 

[MagnumForceGTO]

What are your plugs gapped at? Also, when was the last time you changed them?

 

[Robert A. Warof]

Plugs are 1 month old and the gap is .040. The car has 133K on it but otherwise feels like it's in good shape.

 

[AmkreadGTO]

u needa gap down... try some where around 0.034-0.030

 

[Robert A. Warof]

Thanks - any other possible solutions? I want to be able to try as many as I can.

 

[wraith]

Watch your boost. If its doing it in third and the boost is near 14-15psi, its the plugs

Sam

 

[Robert A. Warof]

Thanx everyone - it probably is the plugs 'cuz it does start to miss at about 1 bar.
Robert