DamageINC Posted May 11, 2010 Share Posted May 11, 2010 Blah, you know those vehicles that just do everything they can to make you look like a bad tech and a shoddy shop? I get an '04 Chevy Venture 3.4 in early last week, check engine light on, barely runs & stalls frequently, P0300 in memory. Real quick diagnosis, fuel pressure regulator leaking internally and fuel is being sucked into the intake past the diaphragm, common problem with the 3.4 in general. Check everything else - no other issues. Sell the regulator, slap it on, clear the codes & test drive - off she goes. Lady comes back yesterday with a CEL on again, running rough, this time a P0171. Found a loose vacuum line at the back of the throttle body and loose intake hose clamp ON the throttle body. Neither of these parts were touched by us - but whatever, I clear the codes, fix the problem, send her on her way no charge because she was just here anyway. She comes BACK again, minutes later, now there's "this nosie that wasn't there before". Sure enough, strange humming noise at certain load levels that you can hear inside the cabin, through the air vents, but it's barely audible at all underhood. Kinda reminiscent of an IAC "hum" if you've heard that before. So I roll the window down and see if I can hear it while driving, stll very minor.. after a few minutes of probing around, I pull the vacuum line off the new FPR I installed - noise goes away. The fucking diaphragm is vibrating HARMONICALLY and you can hear it in the cabin. So we have to put another regulator on it. Tell her the car is ok to drive though, and to come back tomorrow. She leaves, and comes back AGAIN 5 minutes later. "My window won't roll up". Needs a switch now. Someone get me a beer. Dave Quote Link to comment Share on other sites More sharing options...
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