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ricardorey5 10-13-2011 11:11 PM

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

Escape 10-14-2011 12:00 PM

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.

ricardorey5 10-14-2011 01:33 PM

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

4.whoa 10-22-2011 12:03 AM

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.

Dafish 01-09-2012 08:59 AM

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.

2005JGC 01-11-2012 12:48 PM

I would double check that your distributor is installed correctly... Just one tooth off and it will exhibit these symptoms.

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xjrob 01-13-2012 08:38 AM

Re: engine troubles
check your injectors n fuel rail, make sure u have pressure. if ur gonna change out injector check out these from 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.

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