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98 Chevy Venture Runs Rough and Dies Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Engine Troubleshooting dominion New User Aug 3, 2011, 8:03 PM Post #1 of 5 (4517 views) 98 Chevy Venture Runs Rough and Dies Sign In I have a 1998 Chevy Venture 3.4 v6. While driving 25mph on a flat area my oil pressure light came on. The car immediately started running really rough and died within seconds. I have run a Diagnostics on it and came back with the P0300 Random/Multiple Misfire Detected and also P0442 EVAP Emission Control System Leak. I know the latter can be as simple as a bad gas cap and am not worried about it. What I am wondering is this... The oil Pressure Light is not going off no matter what I do. I have tried turning the car on and removing the wire yet it stays illuminated. I am pretty sure that is bad. I know there is a protection that creates a misfire when oil pressure drops below a certain level. Can a short in my harness somewhere be causing the oil pressure light to come on and in turn cause the computer to think I have no oil pressure and prevent my car from running properly? If so, is there anywhere I can look to narrow the possible points of said short to make the repair easier? Also, should this kind of error be showing on my OBD2 Reader? Sidom Veteran / Moderator Aug 3, 2011, 10:47 PM Post #2 of 5 (4506 views) Re: 98 Chevy Venture Runs Rough and Dies Sign In Run a compression check on #5 & 6 cyls. It they're zero or very low, pull the frt valve cover & watch the rocker arms while someone cranks it. If #6 arms don't move then you have a broken camshaft. It would account for the multiple misses & no oil pressure at the same time.... There are other things that could cause this problem as well but the 3.1s & 3.4s are good for breaking camshafts, especially if they ever had an intake gasket fail & water was ingested............. I'm not sure where you got the idea the PCM will create a "miss fire" due to low oil pressure but that info is inaccurate... dominion New User Aug 4, 2011, 12:39 AM Post #3 of 5 (4500 views) Re: 98 Chevy Venture Runs Rough and Dies Sign In Umm because it says it does in the owners manual. Hammer Time Ultimate Carjunky / Moderator Aug 4, 2011, 3:17 AM Post #4 of 5 (4495 views) Re: 98 Chevy Venture Runs Rough and Dies Sign In Quote Umm because it says it does in the owners manual. You have to be misreading something there. It won't say that. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Sidom Veteran / Moderator Aug 4, 2011, 10:25 PM Post #5 of 5 (4482 views) Re: 98 Chevy Venture Runs Rough and Dies Sign In Out of all the possible avenues this thread could've gone down & this is the direction it takes Damn....outta popcorn...........guess I'll have to pass...........   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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