TJ won't start after engine replacement

Andy53

New Member
Joined
Feb 6, 2024
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7
Location
Florida
Just put the motor back in after pulling to do some repairs. I have an 01 and it has no crank no start. Checked all grounds, battery is good, replaced ignition switch, replaced actuator pin, relays and Fuses are good. Still not getting power to the small starter wire. It will start and run if you jump the start. Any ideas?
 
Download the FSM for an 01 in the resources section... there's a troubleshooting diagram for no crank no start...might be the ASD relay stuff.

-Mac
 
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No crank makes me think NSS, which you said you bypassed. If you pulled an engine, I’m gonna assume you did the bypass correctly. :)

Next guess would be ignition switch?
 
If you pull the connector off the ignition switch and power the starter wire what happens? Is there power coming from the battery to that connector?

Can you turn the ignition electrical switch by hand and start it?
 
When you turn the ignition switch to Crank; is there 12V present on the starter solenoid stud ?
Have you tried jumping the starter solenoid stud to the starter motor battery cable stud ?
Will the starter engage and crank when you perform the above procedure ?
 
No crank makes me think NSS, which you said you bypassed. If you pulled an engine, I’m gonna assume you did the bypass correctly. :)

Next guess would be ignition switch?

Replaced ignition switch and actuator pin.
 
When you turn the ignition switch to Crank; is there 12V present on the starter solenoid stud ?
Have you tried jumping the starter solenoid stud to the starter motor battery cable stud ?
Will the starter engage and crank when you perform the above procedure ?

Yes there is 12v and it will start and run when jumping the starter in that way.
If you pull the connector off the ignition switch and power the starter wire what happens? Is there power coming from the battery to that connector?

Can you turn the ignition electrical switch by hand and start it?

Yes there is power to the connector.
I can turn it by hand but still will not start.
 
Yes there is power to the connector.
I can turn it by hand but still will not start.

What if you send power to the start wire in the connector?on my 97 it is this yellow wire I'm pointing to.if that works you know its something other than the wiring to the starter

20231226_164157.jpg
 
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Got the starter issue fixed. Ran a wire from the ignition straight to the starter.
New issue is now when I accelerate it spits, sputters, backfires and shuts off. It will start back up after it sits for a few minutes. Any ideas??