It sounds like the EGR valve could be engaged while the engine is at idle, Please disconnect the vacuum line to the EGR and retest. Get back to me with the results so we can continue. Thanks for using 2carpros. Com
April, 7, 2010 AT 4:12 PM
Hi J. Hollar, Welcome to 2carpros and TY for the donation
Did you put engine no.1 piston on its compression stroke/TDC and line the camshaft and crankshaft markings as specified and the timing indicator on the pulley on TDC/0 and rotor pointing to the no.1 cap tower? Valve and Ignition timing could be still off
Try cleaning out the idle air control valve and test the throttle position sensor and clean out the MAF with an approved cleaner and also clean out the EGR valve.