swaped engine, need help
CF Veteran
Joined: Jul 2009
Posts: 2,158
Likes: 11
From: Chico,ca
Year: 89
Model: Cherokee
Engine: 4.0
You sound like you have your back against a wall here. You have comp,fuel pressure and spark. Pull #1 plug and place a rag in it with a screw driver,make sure it is tight,just in the spark plug hole not in the cylinder,just tap your ign enough to bump the motor until the rag pops out,then look at your hormonic balancer and make sure you are at top dead center,tdc,the pointer should be at 0,if not put it there.then make sure your rotor is pointing at #1 on the dist cap. it only has to be off a small amount to not run. All it takes is fuel,comp.spark and timing. I hope this helps,I have no idea what your level of ability is.
Ididnt replace the distributor. Im runnin out of money and dont know what to do from here.I did replace the coil.I can smell something when Itry to start it . Im not sure what. Maybe its an odd fuel odor. im new to this so im not sure.
Last edited by troy fritz; Jul 30, 2009 at 09:41 PM.
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I didnt replace the sensors or comp and new motor was basically the block and head . Ipulled parts from old motor to complete it.Im about out of money and dont know what to do from here. The new motor is from a 98 cherokee.
You sound like you have your back against a wall here. You have comp,fuel pressure and spark. Pull #1 plug and place a rag in it with a screw driver,make sure it is tight,just in the spark plug hole not in the cylinder,just tap your ign enough to bump the motor until the rag pops out,then look at your hormonic balancer and make sure you are at top dead center,tdc,the pointer should be at 0,if not put it there.then make sure your rotor is pointing at #1 on the dist cap. it only has to be off a small amount to not run. All it takes is fuel,comp.spark and timing. I hope this helps,I have no idea what your level of ability is.
CF Veteran
Joined: Jul 2009
Posts: 2,158
Likes: 11
From: Chico,ca
Year: 89
Model: Cherokee
Engine: 4.0
You say you have spark,so I doubt you forgot to hook up your cps,I am assuming you have an automatic,if so are you using the same flexplate as before?
im in the same boots as you op. try the crankshaft position sensor. test the coil, and make sure youre sparkin. check the firing order. check the rotor + cap. check the throttle position sensor. no pop is no fun eh?
edit:
spoke too soon, if timing light lights up you got spark. like previous might not be strong enough to start it.
try unplugging and re plugging the cps harness. heard this helps!
edit:
spoke too soon, if timing light lights up you got spark. like previous might not be strong enough to start it.
try unplugging and re plugging the cps harness. heard this helps!
Last edited by JeepDeepInIt; Jul 30, 2009 at 10:52 PM.
CF Veteran
Joined: Jul 2009
Posts: 2,158
Likes: 11
From: Chico,ca
Year: 89
Model: Cherokee
Engine: 4.0
flexplate on an automatic is the flywheel,if you have an automatic,it is a flexplate,if you have a manual trany it will be a flywheel. Both ar attached directly to the crankshaft. The reason I asked if you were using your old flexplate is,I bought a 91 motor and put in my 89,it would not run,because the flexplate on the 91 is different than the 89,my cps did not like that so out came the trany an replaced the flexplate with mine.


