help motor die/lag problem.

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04-30-2014, 06:21 PM

9294Forrest

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help motor die/lag problem.

While driving at random the temp gauge will fall to 0 then the motor will lag, loose power and die if idling. No codes or stored codes, fuel pumps working. Fuel pressure okay. Computer module??
99 xj 4.0l

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04-30-2014, 06:25 PM

Florida5

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Model: Cherokee

check your vacuum system. psv valves, etc make sure nothings blocked.

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04-30-2014, 06:29 PM

9294Forrest

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What makes the temp gauge shut off? I dont think its a vacc issue. Hmm

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04-30-2014, 10:48 PM

9294Forrest

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Bump

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05-01-2014, 07:25 AM

CCKen

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Year: 1999

Model: Cherokee

Engine: 4.0

Quote:

Originally Posted by 9294Forrest

The Engine Coolant Temperature (ECT) sensor on the thermostat housing plays a significant role in the engine fuel management system (and coolant temp indication).

Check the ECT sensor connector for security of attahment. If secure, remove the connector and inspect for corrosion in the connector pin cavities and the pins on the ECT. Inspect the two wires to/at the connector for chafing.