Engine Performance problem
2000 Chevy Venture 6 cyl Front Wheel Drive Automatic 138000 miles
Here is all the info I have...
OK...a week ago I posted up about my 2000 Chevy Venture problem. This all started when I tried to pass someone and it acted like the engine missed on me. Barely got it back to my in-laws house. We got it home and my mechanic is just aggravated with it. He did replace the fuel pump with an AC Delco pump as he said the old pump wasn't holding pressure and sometimes wasn't pumping at all.
He said the van starts and idles PERFECT..no missing, not running rough, etc. Drive the van down the road and after it warms up...it starts acting like it misses. Pull over and put it in Reverse...it doesn't miss....doesn't matter if you are in 1, 2, 3 or OD. Slip in in neutral...runs FINE with no missing. He also said sometimes it will stop if you stomp on the gas...sometimes it will stop once you put it in reverse and go back forward. They have had one of the expensive Snap-On scanners hooked onto it...NO CODES WHATSOEVER...ran the van with it connected the whole time and when it would act up...NO CODES...I think I am going to drive him to drinking with this one....the biggest problem is that it is RANDOM..it won't follow a set pattern of doing it! NOW one code constantly came up that is gone now was the P01404 I believe which was something with the EGR...there was a loose vacuum hose coming from the PCV Valve, seen below circled in blue in second photo (this is a photo of the old one so it's not kinked like that), I replaced that and the code hasn't come back..not sure if it was because of the vacuum hose or something happened with the EGR...
Any suggestions...things we have done...
I pulled off the PCV Tube on accident, replaced with NEW Circled in red in second photo
NEW AC Delco plug wires
NEW Fuel Pump
NEW Fuel Filter, FRAM which is what was on there, this was replaced a day or so before the pump...the gas had black crap in it on the gas tank side....black stuff was NOT in the tank so it was coming from the pump.
All work prior to this was just regular maintenance, I had the head gasket replaced this time last year though, had the dancing needle, the leak wasn't bad enough to have junk in my oil.
Question...replacing fuel pumps...doesn't require a PCM reset does it? The only out of ordinary thing that has happened just before this...was the van started misfiring, blinking SES light...ended up being one of the BACK plug wires had laid on the manifold and melted...we replaced all the wires...my wife RIGHT AFTER that went straight to Raleigh, NC..which is about a 2 hour drive...she said it shuttered once when she was getting off the interstate. Got to her mothers and the next time it was driven was by me...which is when the above started...
Van running fine with EGR P01404 code
I messed around and must have jiggled the wires which caused the flashing SES light and burned wire
Replaced vacuum hose running from PCV Valve, shown above circled in blue
Replaced Spark Plug Wires
drive to Raleigh
Stutter started once down there
That is the chain of events leading to this...
Tuesday, February 2nd, 2010 AT 9:36 AM