utahalltrac1
New member
Just bought this car, it is a 91 all trac with 91000 miles. I replaced the timing belt, water pump, plugs, fuel and air filters, changed all fluids. I rigged up a cheaper boost gauge and disabled the vsv it was boosting to about 6-7psi I installed a manual boost controller and now I'm running about 12-13psi. The car runs really smooth and has the low end power but when it hits around 4500-5000 rpm's the power drops off pretty bad. The boost pressure isn't spiking or anything so I'm pretty sure it's not hitting the fuel cut. So the question is am I losing fuel pressure or could it be something with air flow? When does the intake runner thing kick in?