No Spark, No Fuel, No Injector Pulse

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01-28-2009 | 12:12 AM

#31

Nukasu

Thread Starter

Junior Member

Joined: Jan 2009

Posts: 34

Likes: 0

Year: 1989

Model: Cherokee

Engine: 4.0L Renix

Quote:

Originally Posted by quickshoe

You don't happen to be "lovesappy2" do you? If so, I recently sold an ECU on ebay for $20. If it was for you...glad it helped!

No it wasn't you I bought mine for about 70 bucks. I use the same name on Ebay as I do on every site. It is hard to find a unique username anymore. Out of all the ebay stores it was one of two that matched my numbers. The one from the other store was shotty looking and he would not come down on price, wanted $100.

Quote:

Originally Posted by kamokid

not sure what cps sensor stands for, but when mine didnt start i replaced the crank censor.. not sure if thats what you listed, but i thought id throw it out there

As for your thread, already replaced CPS Sensor a.k.a. (Crank Position Sensor) before I replaced ECM and it still didn't help. It was the computer (ECM) the whole time

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01-28-2009 | 12:17 AM

#32

Nukasu

Thread Starter

Junior Member

Joined: Jan 2009

Posts: 34

Likes: 0

Year: 1989

Model: Cherokee

Engine: 4.0L Renix

Everything's Good

Ok a little update to close this thread

Replaced ECM now everything runs (better than before might I add)
As for the brake problem replaced rotors, calipers, master cylinder, and booster, all out of a '95 Cherokee. Pull-a-part is a wonderful place everything replaced including price of ECM was less than $140.

Everything works now, so I am ready for the snow and good thing too, we are getting pounded with 6-12" over today and tomarrow.

Thanks for the help everyone!

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01-01-2011 | 04:39 PM

#33

x91j

CF Veteran

Joined: Oct 2009

Posts: 5,390

Likes: 3

From: Chicago IL

Year: 1997

Model: Cherokee

Engine: 4.0 Straigh 6

Sorry to reopen an old thread but I'm having the same problem. I have no cel when keyed on and I'm having a no start. The jeep just cranks. Now has anyone ever had a problem with a cps causing a cel not to come on at all? Even on key on when it does a light check.

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01-01-2011 | 04:43 PM

#34

ezab

Seasoned Member

Joined: Nov 2010

Posts: 475

Likes: 2

From: Michigan

Year: 1998

Model: Cherokee

Engine: 4.0

Did you check for spark, fuel pressure and injector pulse?

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01-01-2011 | 04:55 PM

#35

x91j

CF Veteran

Joined: Oct 2009

Posts: 5,390

Likes: 3

From: Chicago IL

Year: 1997

Model: Cherokee

Engine: 4.0 Straigh 6

I have fuel at the rail and can hear the fuel pump turn on. Pretty sure I have no spark. The thing that's worrying me is the no cel at key on which makes me believe it could be a faulty pcm. Because some times when I let the jeep sit for a day or 2 it has trouble starting but most the time I could get it to start.

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10-28-2019 | 08:29 PM

#36

Devin Burden

Newbie

Joined: Oct 2019

Posts: 1

Likes: 0

Model: Cherokee (XJ)

Quote:

Originally Posted by jpdocdave

i gotta disagree. the fuel pump will prime regardless of spark. and if you have a bad coil for example, you will still have fuel pressure. and at first it did sound like a cps untill you said the pump didn't prime. i'm assuming you checked all the fuses. if no lights light up for the bulb check with the key on for the first few seconds thats a sign of an ignition switch. do you get any of the bulbs for the first few seconds? if not, i'd say switch most likely.

when the switch goes out, its not even switching any signals to the ecm or anything so no spark, fuel prime or pump, no pulse, and it will still crank, thats a seperate part of the switch that rarely goes bad.

I have the same issue with my 96 jeep cherokee and it will turn over but i cant hear fuel pump kicking on no power even going to ignition coil i tested the coil with test light all fuses and relays are good and cant get anything to work as far as fuel,spark,or power to injectors could this be a sign of bad ignition switch??

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