Author Topic: No boost (Read 2174 times)

vwking · « **on:** March 15, 2008, 04:34:22 pm »

I just finished installing a 1.6 Turbo motor and turbo from a 1986 Jetta into a 1981 VW Pickup. The motor has been sitting for at least 10 years, last plates on the pickup were 1991. I had a tough time getting the engine to start but finally started by pull starting. There is a constant woosh when motor is running and which I believe to be coming from a leak where I welded the downpipe to the rest of the exhaust. Truck terribly lacks power-might reach 40 MPH in a mile. I installed a pressure guage with a vaccum T in the line that runs from intake manifold to injection pump-no pressure at anytime from 1st to third gear under full throttle. I blocked the exit for the pop off valve and the corresponding whole in the intake and test drove again-still no boost pressures-any suggestions? Bad turbo? Thanks,Brian

zukgod1 · « **Reply #1 on:** March 15, 2008, 05:07:58 pm »

Did you check the turbo while the engine was out?
Did it spin freely?

Op-Ivy · « **Reply #2 on:** March 15, 2008, 05:10:11 pm »

Check the lines going to the LDA. I had mine burst once so I had no boost. It would just leak out of the hole.

vwking · « **Reply #3 on:** March 15, 2008, 05:13:06 pm »

Turbo did spin freely while motor was out, did not seem to have excessive wear or play