Quote:
Originally Posted by stanlam
can u explain the backpressure test? I can start it up now and it doesnt smoke. When i take it out on the road up to speed(60 mph) it will start smoking. I pull back in the drive and no smoke.  |
You would start by removing the o2 sensor before the cat and installing an exhaust back pressure testing gauge like one of this guys.
Start your engine for 30 seconds and record the results. Pressure should not exceed 1-2 psi.