loss of power
08-24-2018, 04:31 PM
#1
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loss of power
96 4.0 5 speed I have a k&n filter stock box and just did new plugs and wires and new fuel filter and also I have stock gears with the jku stock tires and rims I have loss of power can yall give me an idea milage is like 175,000 im thinking it may be the fuel injectors any answers yall can think of will yall let me know
08-25-2018, 07:46 AM
#2
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
What about a clogged catalytic converter?
08-26-2018, 03:55 PM
#4
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Your vacuum gauge should come with an instruction booklet outlining the procedure.
Hook the gauge up to a vacuum source on the intake manifold. Start the engine and note the vacuum reading. Usually 17 to 21 inches of vacuum.
Throttle the engine up to 2,000 to 2,500 RPM for 20 seconds or so and the vacuum reading should stabilize to the same reading you got at idle.
Let the throttle snap shut. The vacuum reading should shoot up about 5 inches of vacuum higher for a second and then come quickly down to the original reading. If the vacuum reading stays high and comes down slowly with jerky needle movements, you have an exhaust restriction.
Hook the gauge up to a vacuum source on the intake manifold. Start the engine and note the vacuum reading. Usually 17 to 21 inches of vacuum.
Throttle the engine up to 2,000 to 2,500 RPM for 20 seconds or so and the vacuum reading should stabilize to the same reading you got at idle.
Let the throttle snap shut. The vacuum reading should shoot up about 5 inches of vacuum higher for a second and then come quickly down to the original reading. If the vacuum reading stays high and comes down slowly with jerky needle movements, you have an exhaust restriction.
08-26-2018, 05:17 PM
#5
Newbie
Thread Starter
Your vacuum gauge should come with an instruction booklet outlining the procedure.
Hook the gauge up to a vacuum source on the intake manifold. Start the engine and note the vacuum reading. Usually 17 to 21 inches of vacuum.
Throttle the engine up to 2,000 to 2,500 RPM for 20 seconds or so and the vacuum reading should stabilize to the same reading you got at idle.
Let the throttle snap shut. The vacuum reading should shoot up about 5 inches of vacuum higher for a second and then come quickly down to the original reading. If the vacuum reading stays high and comes down slowly with jerky needle movements, you have an exhaust restriction.
Hook the gauge up to a vacuum source on the intake manifold. Start the engine and note the vacuum reading. Usually 17 to 21 inches of vacuum.
Throttle the engine up to 2,000 to 2,500 RPM for 20 seconds or so and the vacuum reading should stabilize to the same reading you got at idle.
Let the throttle snap shut. The vacuum reading should shoot up about 5 inches of vacuum higher for a second and then come quickly down to the original reading. If the vacuum reading stays high and comes down slowly with jerky needle movements, you have an exhaust restriction.
08-26-2018, 08:26 PM
#7
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