Okay so we changed out the fuel rail and injectors from a car at the junk yard. All injectors read between 12 and 12.3 ohms. Car started making a horrible knocking noise and acting like it was miss firing. It isn't rod knock. Its not a constant knock. It sounded like something was knocking around the intake. So we decided to take the intake off and make sure nothing had accidentally fallen in one of the holes for the injectors. We power washed both the intake and the plenum cleaning it inside and out. Made sure there was no debris under it. Put in new gaskets of course, new grommets and rings where needed, new coolant temp sensor, thermostat, oxygen sensor, new plugs, wires were good quality and about 1 yr old, and new crank sensor. Still knocking and running horrible. Decided to put the old fuel rail back on and replace the 2 bad injectors (with other used ones not from the other rail). It is running better but still knocking. Any ideas? Can fuel injectors be plugged and still show good resistance on an ohm meter? Is there anyway to check for clogged injectors and clean them individually. Just asking because I've heard plugged or malfunctioning injectors can cause knocking.
Tuesday, November 1st, 2011 AT 2:05 PM