Yes. It appears to be a vaccum leak but am unable to locate. The following have been done:
After replacing timing chain had to replace push rods, lifters, cyclinder heads machined, replaced all sensors incl. TPS (which were properly adjusted), changed IAC, replaced computer, TBI, rebuilt fuel pressure regulator, repaced intake manifold gaskets, throttle body gaskets. Checked all vaccum hoses. Could not find leaks. The vechicle does not maintain idle after reaching operating temp. Idle drops. Struggles between 2-5rpms. Currently in the process of replacing coil.
Please advise as what else I may overlooked.
Btw: recently found the accelerator screw. It appears to be rusted and is currently a little hard to move.
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Tuesday, October 29th, 2013 AT 10:33 PM