driving on highway, engine bogging and slowing down when raining - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-20-2009, 11:51 AM   #1
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Default driving on highway, engine bogging and slowing down when raining

So I just got my 98 SSEI last week and I was driving in some pretty hard rain yesterday and noticed that when I would try to accelerate I had major loss of power and the engine would bog and not move at all. The car never died because after still driving it, it at times would seem fine, but would notice if I hit a decent sized puddle that this problem would start to occur (and yes I would try to avoid any puddles but when visibility is next to nothing it makes it kind of hard to see them). I'm thinking maybe something to do with the coil/crankshaft sensors getting wet??? Any ideas???

Thanks to everyone ahead of time for getting back to me quickly!!!
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Old 08-20-2009, 07:56 PM   #2
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First thing I would try on a dry motor ....not wet already from driving is take a bottle of water and with the motor on...... spray your coils with water and see if the engine misses. Be careful to not get shocked! If it misses when doing this that more than likely it has a bad coil pack.

Then check to see if your air filter box and duct going to your throttle body is all tightly sealed up. It could be leaking in water......
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Old 08-21-2009, 07:44 AM   #3
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How old are the plugs and wires? Kinda sounds like the car might need a tune up if they are old.

Hey Todd...I wait til it'* dusk out and mist with the hose.. Never get shocked that way
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Old 08-21-2009, 07:48 AM   #4
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Hey Bill....what hose are you talking about? The house hose or.......your...hose?........lol
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Old 08-21-2009, 08:13 AM   #5
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Sounds like bad/dirty plug wires. Get a spray bottle and mist the wires when the engine is running. Do this at night and turn off all the lights. Watch for blue flashes. These are grounds and will kill the engine power. Also mist the coils, there could be a grounding problem there as well.
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Old 08-21-2009, 02:27 PM   #6
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I'm gonna try this tonight. Thanks for the help. I just bought the car last weekend and plan on doing a tune up, plugs/wires/oil change this weekend because then at least I'll know what has been done. I don't think it'* the plugs though because when it'* dry the car runs great and pulls strong. But I'm gonna change them anyway. How much is a coil pack and what kind should I get?

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