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DJR86
Novice
Oct 4, 2006, 7:58 PM
Post #1 of 7
(2259 views)
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96 Delta 88 Misfires
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I have been having misfiring problems with my 1996 Oldsmobile 88. The car sat outside and then in the garage for about a year, and then it started to be driven again in the spring after some routine work. A little over a week ago the check engine light began to come on and off, and the car ran a little rougher than normal. Earlier today I picked my younger sister up from school, and the engine began to misfire as soon as I turned it on. The check engine light began to flash as well. Our house is only a few miles a way, so we drove it back there, but the misfire condition got worse everytime I stepped on the gas pedal. The entire car shook as I drove it. When I got home I opend the hood up to check the engine out and I noticed smoke comming out between the radiator and the engine, as well as a terrible burning smell. The cars temperature was normal, so it was not overheating as I drove it. I'm not quite sure what the problem is. Has anyone had a similar situation like this? If so how much money did it cost to fix the problem?
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steve01832
Veteran
Oct 5, 2006, 2:45 AM
Post #2 of 7
(2257 views)
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Re: 96 Delta 88 Misfires
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The first thing I would do is start the car and block the wheels. With the engine running, use spark plug wire pliers and lift each wire from the spark plugs one at a time and then reinstall. When you lift each wire listen for the rpm to drop a little. When you find one that the rpm doesn't change, you've isolated the problem cylinder. Check for spark. Try this and let us know the results so we may go further. Also, check the routing of the plug wires, you may have one touching the engine or manifold that may be your smell and misfire.
Steve
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DJR86
Novice
Oct 26, 2006, 11:25 AM
Post #3 of 7
(2236 views)
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Re: 96 Delta 88 Misfires
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Sorry that has taken me a while to get back on here. My car is not misfiring anymore, however I the check engine light is still on. I haven't driven the car at all, except for when I realized it was no longer misfiring. I have noticed a few other things going on now. When I drove it ran much smoother than normal, and the engine temperature only went up to a little of 150 degrees. I didn't drive it far at all, but normally it would have reached 200 degrees by the time I had gotten where I did and came back. I also noticed that the oil level dropped a little bit from where it was the day when it misfired. I'm going to get it checked with a scaner soon to see what sensor is making the check engine light come on. I also noticed something, all of the times the check engine light has come on, and when it misfired, were all with in a day after I put gas in the car. I'm not sure if this could mean my car has a fuel system malfuntion or not, but I know its an important clue to the problems that I have been having.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 26, 2006, 1:41 PM
Post #4 of 7
(2234 views)
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Re: 96 Delta 88 Misfires
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Sorry for a quick read here but 150 engine temp when warmed up will cause problems. I really can only go by my own cars but they get to proper temps within a couple miles. I don't know how far you are driving?? T
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DJR86
Novice
Oct 26, 2006, 6:24 PM
Post #5 of 7
(2228 views)
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Re: 96 Delta 88 Misfires
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The car was driven 2 to 3 miles, and normally it has warmed up by the time it has gone just 1 mile. I checked the engine after my last post, and I did notice oil on the engine in a few different areas. Like I said the oil level went down a little bit on its own, so its very possible that I have a small oil leak somewhere too.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 27, 2006, 8:03 AM
Post #6 of 7
(2227 views)
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Re: 96 Delta 88 Misfires
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Sometimes oil on engine is caused by the PCV system not able to keep up. Blow by can be the problem.
You can check at the dipsick tube that the engine has about 1 Hg of vacuum and if it doesn't there are problems. If it has pressure instead oil will leak out at the weakest link, T
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steve01832
Veteran
Oct 29, 2006, 6:10 AM
Post #7 of 7
(2221 views)
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Re: 96 Delta 88 Misfires
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On the OBDII cars, if you top off the tank the excess fuel goes into the EVAP system. If the computer runs a diagnostic test at that time, the extra fuel will give a false rich condition that the computer will see, and set a code. Also, if you fill up with the car running and the computer does a fuel test, it won't build the vacuum and the computer will set a code. The gas cap may even need to be replaced. These may correct the "fill up" problem you have been having.
Steve
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