2002 Jeep Cherokee Morning sickness

Tiny
GEORGINIO79
  • MEMBER
  • 2002 JEEP CHEROKEE
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
My jeep runs all day perfectly !
The problem is that every morning for the last 3 days when I start the car first it acts like the batterie is low where the engine would turn slowly unlike regulr stat-ups, and if I don't use the accelerator at the same time it won't start, then when it starts for the first five minutes if I release the accelerator pedal it shuts off ! After 5 minutes I can release the pedal but the RPM would start bouncing from 0.3 to 0.6 (normally it used to run steadily on 0.7) up and down while the engine keeps shaking weirdly ! And after 10 or 15 minutes everything else goes back to normal ! Note that the last 3 days we had a sudden drop of temperature in my area I don't know if its any how related ! Could it be the alternator or the fuel pump or what?
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Friday, November 27th, 2009 AT 10:14 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
First, the cold start sounds like the battery may be getting weak. How old is it? The idle problem may be caused by a few things including a weak battery. Lets start the cheapest way, the battery. Take the jeep to a nationally recognized parts store and have them load test the battery.

Also, has the check engine light come on?

Let me know.

Joe
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Saturday, November 28th, 2009 AT 1:44 AM
Tiny
GEORGINIO79
  • MEMBER
No no engine light nor other lights are on dashboard seems normal with no warning lights !
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Saturday, November 28th, 2009 AT 2:42 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Have you had the battery tested (load tested)?
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Saturday, November 28th, 2009 AT 2:54 AM
Tiny
GEORGINIO79
  • MEMBER
No but the batterie is only 5 months old ! And since the RPM runs weirdly the first 10 minutes up and down I never thought of the batterie but I will !
Thanks for the fast reply I will keep you posted !
Thanks again !
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Saturday, November 28th, 2009 AT 2:59 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
I didn't know it was that new. It wouldn't hurt to have it checked. Also, make sure the battery terminals are clean and tight and the grounds to the engine block are the same.

Your idle problem sounds like a throttle position sensor or idle air control valve. However, without a check engine light on, that is a guess at this point. Have you checked for vacuum leaks, EGR?
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Saturday, November 28th, 2009 AT 12:24 PM

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