GCARRACER

Looking for a little help here!! I recently built a LQ4 for a project 91 Chevy pickup and when i started the engine it was carrying 45psi oil pressure hot until i hooked the PCV system up wrong and it built crazy vacuum in the crank case and lost oil pressure. I replaced the oil filter thinking maybe it collapsed it internally and oil pressure came back. Then tried reconfiguring PCV system and did the same thing. But now I can not get oil pressure back. Is there ant chance it could have sucked the o-ring out of the pickup?

Gray86hatch

iTrader: (83)

A vac on the crankcase is not going to cause issues idling. Vacuum over 12in can pull oil pressure out and could cause engine damage if care is not used.

A pvc system is not capable of doing this.

Tim

Taxman20

iTrader: (11)

^^^^^ exactly. You can never pull enough vacuum in a PCV system. So that's not your problem. We run Moroso vacuum pumps on our drag motors that pulls serious vacuum which increases HP. You have another problem. Its just coincidence that it happened at that time.

RockinWs6

Maybe he sucked all the oil out the engine