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  #1  
Old 10-13-2011, 11:11 PM
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engine troubles

i just rebuilt my 88 xj engine, 4.0 including new cam (voodoo 262/268) pistons etc etc. the problem is when i try to start it, i have to hit the gas a little and it starts up and idles horribly, and stalls. i bought new plugs, cap, rotor, wires. new cks sensor. i am honestly stumped. thought maybe a stuck injector? also i have no power at all. runs like crap
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Old 10-14-2011, 12:00 PM
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Re: engine troubles

Seeing as how you just rebuilt it there is a lot that "could" be causing an issue.

Have you checked and rechecked cam/crank timing?
Ignition timing?
Any codes?

Those would be my suggestions.
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Old 10-14-2011, 01:33 PM
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Re: engine troubles

The timing is on, no codes. Its an 88 and I believe they do not have codes, and if they do, I have never heard of it. I was measuring voltage at the MAP plug and it read .03V, and the same at the TPS plug so definately comething weird is going on
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Old 10-22-2011, 12:03 AM
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Re: engine troubles

They have codes, its just more of a pain to get them. A haynes manuel will tell you how as well as list what they mean.
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Old 01-09-2012, 09:59 AM
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Re: engine troubles

With all that work on the engine I would recommend changing the OEM injectors for the Bosch injectors, more power and better fuel mileage.
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Old 01-11-2012, 01:48 PM
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I would double check that your distributor is installed correctly... Just one tooth off and it will exhibit these symptoms.

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Old 01-13-2012, 09:38 AM
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Re: engine troubles

check your injectors n fuel rail, make sure u have pressure. if ur gonna change out injector check out these from fiveomotorspors.com also see if u have good spark, sometime the plugs r not gapped correctly n make sure ur runnin either champion or ngk plugs. cherokees r finiky bout the plugs, no platimum what so ever n stay away from bosch plugs.

http://www.fiveomotorsport.com/product-search/?v=20017
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