Slight stumble on power.

ah802 · 2020-11-11 19:05:35

Slight stumble on power, makes tractability parking etc not nice, I do regular maintenance oil filer etc. A can of Sea-foam injector cleaner seemed to help a bit. It's an older 2003/6cyc/2wheel with 140k miles has been reliable, 1 fuel injector died last year and the crank position senor died at the same time.. go figure. Gas cap changed, any other ideas? Pcodes are: P0123 Accelerator Position Sensor (APPS) Signal Voltage Too High P0203 Injector # 3 Control Circuit P0303 (M) Cylinder # 3 Misfire (An open or shorted condition detected in control circuit for Injector # 3 or the INJ 3 injector bank.) P0420 (M) Catalyst System Efficiency Below Threshold P0456 (M) Evaporative Emission Control System Leak Detected (very small leak)

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Nov 11, 2020 | 01:05 PM

ah802

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Joined: Sep 2019

Posts: 5

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Year: 2003

Model: Cherokee (XJ)

Engine: 6 cyc 3000

Slight stumble on power.

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Dec 18, 2020 | 12:23 PM

ah802

Thread Starter

Newbie

Joined: Sep 2019

Posts: 5

Likes: 0

Year: 2003

Model: Cherokee (XJ)

Engine: 6 cyc 3000

Thought I would follow up, (for the benefit of others) after going through a couple of cans of fuel injector cleaner (two tanks), and a mass air clean. I took it to the shop, after $350 and a new set of plugs I was told they got it. When I went to pick it up, they announced it had the same issue and leave it for another day. Next day they announced the issue was abraded wiring in the harness, near the firewall and when the engine torqued it caused shorts, (the solve was to put a split rubber hose around the wiring) they discovered it by shaking the engine a lot (old mounts) or so I'm told. In the end $775 ouch, but so far so good.