Possible carb, was it doing OK recently?
How bout vacuum leak at new tranny?
DO THIS ONLY OUTSIDE, AWAY FROM THE HOUSE!--Keep a small blanket handy--and a FIRE EXTINGUISHER REAL HANDY, for worst case!
Spray Vacuum lines and anything using vacuum. Listen for engine to surge (run smoother or better)---heater controls inside use vacuum too (listen to them, don't spray 'em!). Extra sucked into the carb throat will Deceive you!
Maybe EGR stuck? Take off completely and see where the 2 opening mix?--Maybe Try to Temporarily Block them off separately----Example: Without introducing CRAP into the Intake part, maybe Pound some Aluminum foil in there. To keep them from mixing and also keep exhaust from coming out---USE YOUR IMAGINATION!See if it runs better. If it does replace the EGR.
Showing you a Jeep pic, this is how to activate the EGR with no vacuum, it also makes it run real rough, as if it were stuck openYou might be able to "Needle-nose Plier" the tip end (closest to the manifold) and force it shut, without tearing up the diaphragm. On our 6 cylinder Jeeps, installing headers, we must completely eliminate the EGR---It is not a "Have To" unless they check emissions in your area. On the Jeeps, we saw off the diaphragm, insure the pin is fully closed (tap it in well), then weld it in place. The "Welded Body" is still removable, and a new EGR could still be installed if Need-be
Sorry, I do not have a pic of one welded shut, I installed a Offy 4 barrel intake, and a Holley 390 Carb, ON MY 258 6 Cylinder, when I put my New headers on---It was not designed for a EGR. My old set-up is at my Mom and Dad's house
Keep me informed, I hope things are going well!
Images (Click to enlarge)
Wednesday, February 23rd, 2011 AT 2:37 AM