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Vans & Minivans Chevy Venture Chevy Venture Check Engine Light, Misfiring
85 messages, Last post on Apr 13, 2009 at 7:20 AM
You are in the Chevy Venture Forum. Your Host is Karens
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Replying to: 442dude (Apr 21, 2008 4:56 pm) There is an AutoZone in town and an Advance Auto Parts fairly nearby. I'll try there ASAP, but its hard to drive a vehicle that threatens to stall at every stop sign and light. >they have the secret decoder ring and they do it for free After that 200 oil and radiator change and the 400 tuneup, 'free' sounds real good1 >check your oil - if it looks like a chocolate milkshake, its got coolant in it Nope.. looks like oil. > there are no shortcuts.... Alas! >you need the codes to determine what the car is trying to tell you is wrong, It seems to be trying to tell me more insistently whenever I back up or slow down for a traffic light. I wonder why AFTER the tune up it is still misfiring, particularly when the mechanic tried squirting oil into the cylinder and it still didn't help the compression. Thanks for you help.
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Replying to: fleastiff (Apr 22, 2008 7:03 am)
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Replying to: 442dude (Apr 22, 2008 7:29 am) It seems you may indeed be correct. The Autozone guy said there were two codes: P0301 and P0301-Pending. >I really find it hard to believe that your motor is shot based upon the info so far Yes. I'm a bit doubtful too. Worried about it though. Surely a coil sounds cheaper than a new engine. I got new wires and new plugs and a tune up, but I don't think that included a new ignition coil. Things like crankshaft sensors and cam sensors and timing chains are beyond me though, but even those things sound cheaper than a new engine! |
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Replying to: fleastiff (Apr 23, 2008 2:31 pm) So there's only a misfire on 1 cylinder...not 3...Here's what I think: 1. - Clogged or dead fuel injector...no gas=no fire... 2. Bad coil - If you're getting fuel, I'm not convinced you're getting a good spark at cylinder # 1...if I remember right...the car idles very rough...take off the spark plug wire for cylinder # 1 and start the motor...can you tell any difference? If its no worse, maybe you've got a bad coil... 3. PCM - the computer could be fried...but I doubt it... 4. Bad head gasket...but you already said before that your oil looks good with no coolant in it so I doubt this one too... I wish you the Best of luck...the more I research, the more it leads me towards the fuel injector or the ignition coil for cylinder # 1...the Venture has 3 coils...I hope I have helped, even just a little... John
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Replying to: 442dude (Apr 23, 2008 3:38 pm) New Clue: At slow speeds and just after starting it is noticeably misfiring but as soon as I shift into REVERSE, boy does it get worse!! Far, far noiser and much more vibration! Now I don't know if its relevant or not but one of the occasional drivers of the vehicle does have a habit of shifting from reverse to drive while still slightly in motion! (Yeah, I hate it. Don't think its a good thing to do. Don't know if its relevant to this problem though!). I wonder if the AutoZone giving the codes only for Cylinder 1 means that Cyliners 3 and 4, which also had compression of less than 100 when tested, are now improved? For various logistical reasons, I've not yet been able to get a tank of high-test into it yet, but will do so ASAP.
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Replying to: fleastiff (Apr 25, 2008 9:34 am) While shifting into drive while the car is still moving into reverse is typically not a good idea, I don't think that it caused this problem... It makes sense that reverse would amplify the problem as reverse is ofter a "higher" gear than 1st gear so the misfire would be more obvious. cylinders 3 & 4 have probably not improved but the car should still run acceptably even with compression numbers that are varied...
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Replying to: 442dude (Apr 23, 2008 3:38 pm)
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Replying to: ul00173 (Apr 25, 2008 7:39 pm) A sequined yellow top worn by a cute model; A Fuel Additive concentrate; A Fuel Injector Cleaner. I've figured out I should use the Fuel Injector Cleaner. Sure sounds like its going to be a cheaper solution to go to an auto parts store and buy the Techron stuff than to pay 4500 for a new engine. Thanks guys. I'll let y'all know what happens. In reading about that Techron Fuel Additive Concentrate, I saw mention of a claim that it also cleans the Fuel Sender. As I've had a wildly variable fuel guage for a long time, this product too might be a sensible thing to try as well. |
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Replying to: fleastiff (Apr 21, 2008 10:31 am)
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Replying to: ul00173 (Apr 25, 2008 7:39 pm) Thanks for all your help on this ... I sure prefer buying a double pack of STP Fuel Injector Treatment than paying 4500 for a new engine! |
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