Jeep Grand Cherokee

This topic has 5 replies, 3 voices, and was last updated 9 years, 9 months ago by Kevin Brooks.

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March 20, 2015 at 8:10 pm #658794
Kevin Brooks
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Hi, I’ve got a 98 Jeep Grand Cherokee Laredo 4.0 automatic and it recently started hesitating/ bucking while going up hills/accelerating. I’m not sure what is causing this, but based on my RPMs, I feel like it’s a problem with my overdrive. Suggestions? Help!?
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March 20, 2015 at 9:15 pm #658802
Daniel
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Have you gotten any codes pulled?
March 20, 2015 at 10:28 pm #658809
Dutchie
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Checking for faultcode’s is step#1`, skipping this step is plain stupid.
The problem might be in the ignition, sparkplugs, ignitionleads. These are the most commen isseu’s whit these kinds of complaints
March 23, 2015 at 7:28 pm #659074
Kevin Brooks
Participant
I pulled codes and had 2 new ones:
P0123 for high voltage from the throttle position sensor
P0121 for TPS signal.
I replaced the TPS and the shifting problem did not go away.

Also, when I rev the engine in park, immediately after, it stalls on me now.
March 23, 2015 at 7:59 pm #659076
Dutchie
Participant
Check for missing ground/earth what ever you guys are caling it.
March 23, 2015 at 8:15 pm #659078
Kevin Brooks
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Just ran a code reader again and now I’ve got a P0108: manifold absolute pressure sensor voltage high
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