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97 olds 88 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 coppet New User Oct 19, 2006, 1:33 PM Post #1 of 3 (3319 views) 97 olds 88 Sign In My wife's 97 olds 88 has been misfiring. I had a diagnostic done at advance auto that said "multiple cylinder misfire detected". I have already changed the wires, spark plugs, and ignition coils. It's still misfiring and is barely driveable. Any ideas on what's wrong? DanD Veteran / Moderator Oct 20, 2006, 4:16 AM Post #2 of 3 (3316 views) Re: 97 olds 88 Sign In There are a lot of things other then the ignition system that can cause a misfire.  Low fuel pressure.  Dirty injectors.  Failing injectors.  Excessive carbon deposits.  Vacuum leaks.  Evap purge system.  EGR operation.  MAF sensor out of range.  Other sensors out of range (not enough to set codes but still out)  Poor electrical connections.  Electronic issues (computer) Then we can start talking about engine mechanical? All of these things can cause an engine misfire and all of which would need to be tested individually through a process of elimination. Wish I had an answer for you but at times it’s a lot of legwork, experience and a whole lot of test equipment to find a misfire. Dan. Canadian "EH" steve01832 Veteran Oct 22, 2006, 1:12 AM Post #3 of 3 (3311 views) Re: 97 olds 88 Sign In I have a post in the Tricks of the Trade forum for multiple misfires. Might be worth checking out. Steve   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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