hmac300 replied "clean the throttle plate with choke cleaner and check for vacuum leaks with the choke cleaner around intake ports andthrotle plate connections. Then taek out your egr vvalve and see ifit's all gunked up around the pintle valve inside. It may bestuck open ornotworking right."
pretty sucky answer. I guess thats all I get for $20. Anyway, I did a little more tinkering. Changed a bunch of vacuum hoses. No different. Changed pvc valve. No difference. Unplugged green hose from egr. No difference. Upplugged the electronics from the egr. No difference. Pinched off difference hoses (brake booster, cruise control, heater control) to see if engine would change noises. Nothing. The idle pattern is extremely repeatable. Once warmed up, on restart without pressing gas pedal, engine starts at 1500, settles at 550 to 650 for 2 or 3 seconds, then climbs to about 2500 in about 4 seconds and stays there. Over and over and over. Something is getting a rotten signal from somewhere. I even unplugged the battery to see if it would reset. Could it be the pcm? If I take the pcm out can it be checked?
have the same problem?
Thursday, July 28th, 2011 AT 1:39 AM