no injector pulse
11-21-2013, 04:31 PM
#47
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Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
On 87 to 90 Jeeps it's easy to check your CPS. It's in Cruisers Sig, Linked, on-top if you click on mine.
Last edited by DFlintstone; 11-21-2013 at 06:54 PM.
11-21-2013, 05:43 PM
#49
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Year: 1988
Model: Cherokee
Engine: 4.0
iv never used a multi metter before so how do i use it and what am i checking for. im guessing its a sensor or relay cuz it ran fine before and only 240,xxx miles compared to my other jeeps 370,xxx miles which runs great.
11-21-2013, 05:47 PM
#50
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
11-21-2013, 05:54 PM
#52
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
AC volts. .5 minimum while cranking.
11-23-2013, 10:34 PM
#53
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Year: 1988
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okay i put in a whole new c101 today and new ecu started right up
but as soon as i get on the gas it tries to die and back fires and it almost sounds like its backfiring through the intake.
but as soon as i get on the gas it tries to die and back fires and it almost sounds like its backfiring through the intake.
11-23-2013, 10:41 PM
#54
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Year: 1990
Model: Cherokee (XJ)
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Backfiring through the intake is usually caused by low fuel pressure.
11-23-2013, 10:53 PM
#55
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Year: 1988
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well the tank is pretty much empty its in the reserve for sure. thank you all for all your help ill get pictures of her up soon.
11-25-2013, 12:15 AM
#57
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Year: 2000
Model: Cherokee
Engine: 4.0L
Back in the begining of this post, didn't he say he ran another wire to the fuel pump (12 volts) as it was not getting any power ??? Isn't the fuel pump supposed to have 5 volts vise 12 volts to run it.???
11-25-2013, 06:10 AM
#58
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Year: 1990
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Nope. Battery voltage on starting, about 10 volts on running because the voltage is reduced through the fuel pump ballast resistor in that position.
11-25-2013, 03:00 PM
#60
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Year: 1990
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