Rough start and high Idle

1998 JEEP GRAND CHEROKEE
179,941 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
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SRAMAN
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  • 13 POSTS
Have the vehicle listed above Laredo all wheel drive.
Lately it has been starting real rough, and after doing so the rpm's soar up to 2 and a 1/2, and drives with a high idle. It literally eats up any amount of gas and the temperature gauge is some timey.
Rough meaning it sputters like there is no gas or it is flooded.
I also forgot to mention that as I accelerate the engine gives off a high pitched whine.
Any thoughts or suggestions would be greatly appreciated.
Oct 19, 2018 at 7:25 PM
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MOTOR MASTER
  • CERTIFIED EXPERT
  • 279 POSTS
Hello my name is Dave.

It sounds to me like you have a vacuum leak, that could explain the rough start, high idle and even the whine. I would thoroughly check all the vacuum hoses and see if they are stiff or soft and for cracks and holes. Hope this is helpful and thanks for using 2CarPros.com.
Oct 22, 2018 at 6:01 AM