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Motor cutting out?

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Offline jeff1997

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Motor cutting out?
« on: May 14, 2008, 05:50:01 PM »
My 1.8L Sport is idling rough and cutting out under load. It will still run at speed but I have to feather the throttle to keep it from "hiccuping" The check engine light is not on and I just changed the fuel filter. The local muffler shop checked my cat and said it is hotter than normal but still open. My guess is the coil packs are misfiring. Any other opinions before i drop $100+ on each new coil pack. By the way this all got worse after a Mudfest when the engine just pretty wet and muddy. It ran good on the way home but got bad after I powerwashed the motor. My mileage has also dropped to 13-15 mpg. Granted i'm running 31's with the stock gears but that is CRAZY low. Any help or opinions would be appreciated.
1997 4dr. Sidekick Sport 1.8L DOHC
2" coil spacers- I make and sell 1.5" and 2" on e-bay.  Look under seller: hoepkers
3" Masterkit1 body lift
Custom strut spacers
31/11.50/16 Super Swamper LTB's w/1.5" wheel spacers Steel bumpers Custom cold air intake 2" exhaust w/cherry bomb 98 Expedition, 2" lift, 35's, Magnaflow exhaust - BIG BLUE

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Offline pepatt

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Re: Motor cutting out?
« Reply #1 on: May 14, 2008, 06:28:20 PM »
This may sound stupid and obvious, but try getting new plug wires.

Try misting a little water in the engine compartment at night while revving the motor. If you get a light show you'll know it's the wires.
pepatt

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Offline jeff1997

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  • Gender: Male
  • Suzuki: A Jeep thing only cheaper!!!!
Re: Motor cutting out?
« Reply #2 on: May 14, 2008, 07:27:26 PM »
I do not have "plug wires" like most . The DOHC has those coil packs on each cylinder. The wires going to each one are like 20 gage, very small. I'll try the night thing though. Thanks
1997 4dr. Sidekick Sport 1.8L DOHC
2" coil spacers- I make and sell 1.5" and 2" on e-bay.  Look under seller: hoepkers
3" Masterkit1 body lift
Custom strut spacers
31/11.50/16 Super Swamper LTB's w/1.5" wheel spacers Steel bumpers Custom cold air intake 2" exhaust w/cherry bomb 98 Expedition, 2" lift, 35's, Magnaflow exhaust - BIG BLUE

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Offline pepatt

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Re: Motor cutting out?
« Reply #3 on: May 14, 2008, 08:06:37 PM »
My Chevy truck has the same system. Wires are about six inches long each.
Believe it or not I've had them short on me just like the conventional system.

I believe the voltage it much higher on these systems. That makes a short even more likely.  >:(
pepatt

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Offline jeff1997

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  • Gender: Male
  • Suzuki: A Jeep thing only cheaper!!!!
Re: Motor cutting out?
« Reply #4 on: May 15, 2008, 02:47:38 AM »
Thanks man, I'll look for the short.  ;D
1997 4dr. Sidekick Sport 1.8L DOHC
2" coil spacers- I make and sell 1.5" and 2" on e-bay.  Look under seller: hoepkers
3" Masterkit1 body lift
Custom strut spacers
31/11.50/16 Super Swamper LTB's w/1.5" wheel spacers Steel bumpers Custom cold air intake 2" exhaust w/cherry bomb 98 Expedition, 2" lift, 35's, Magnaflow exhaust - BIG BLUE

*

Offline jeff1997

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  • Gender: Male
  • Suzuki: A Jeep thing only cheaper!!!!
Re: Motor cutting out?
« Reply #5 on: May 23, 2008, 01:09:42 PM »
Bit the bullet and bought 4 new coil packs. I found them on ebay from rockauto for $95 each. The cheapest ones around here were $135 each. Needless to say $400 later and the problem is fixed  ;D ;D I just hope my mpg goes up now also.
1997 4dr. Sidekick Sport 1.8L DOHC
2" coil spacers- I make and sell 1.5" and 2" on e-bay.  Look under seller: hoepkers
3" Masterkit1 body lift
Custom strut spacers
31/11.50/16 Super Swamper LTB's w/1.5" wheel spacers Steel bumpers Custom cold air intake 2" exhaust w/cherry bomb 98 Expedition, 2" lift, 35's, Magnaflow exhaust - BIG BLUE