Bogging out

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11-14-2011, 07:55 AM

stlxj91

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Bogging out

91 xj laredo bogging as if one of the wires are wrong or the cat is clogged. Both are good any ideas??

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11-14-2011, 11:43 PM

cpnwrench

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Year: 1991

Model: Cherokee

Engine: 4.0 L

howdy,

sounds like MAP sensor to me. (vacuum line somewhere?)

or your TPS is going....

just a thought sir.

cpnwrench

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11-15-2011, 05:49 AM

tjwalker

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Year: 1999

Model: Cherokee

Engine: 4.0

Could be caused by about a hundred things.

Is tuneup hardware fresh? Always start there. Fresh Champion copper plugs gapped to .035, new plug wires, cap, rotor, fuel filter.

A clogged cat or exhaust can be easily snaked out with a vacuum gauge.

Testing of your "throttle position sensor" might be a good idea here as well.

I'd start there..........

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11-15-2011, 06:41 AM

stlxj91

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Thanks guys, i just replaced cap, rotor, plugs and wires, crank sensor, and a new fuel pump. Fuel filter is pretty new. Im gonna pull the plugs and check the gap, all the vaccume lines look good. Im going to order a new cat and exhaust this weekend. By any chance could the injectors cause that?

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