Flexplate replacement, now my XJ won’t start.
#16
Junior Member
Thread Starter
Don't quote me on this cause I am no expert on Jeep flexplates but those are not the same. See how the window on the oem flexplate goes all the way to the ring gear, the new one does not. That may be enough to throw the signal off depending on where the crank sensor is actually reading from.
One thing that still doesn't make sense though. If my CPS goes between 0 and 5 volts when I rotate it by hand, this means it sees the windows. What will putting thicker shims do?
I also just got a P0122 which a low voltage TPS. I mapped this guys this afternoon and it has in spec numbers as well.
#17
::CF Moderator::
Join Date: Dec 2016
Location: SoCal
Posts: 3,497
Received 395 Likes
on
311 Posts
Year: 1987
Model: Cherokee (XJ)
Rotating it by hand is completely different than at running speed. I see this all the time with LS engines and the older reluctor wheels that like to separate. They are good up to a certain rpm, then stop reading. Again, taking a 100% guess here that the shorter window is your problem.
Cruiser has been around these jeeps longer than I have been alive so with him saying it's probably the flexplate, it probably is, for whatever reason.
Cruiser has been around these jeeps longer than I have been alive so with him saying it's probably the flexplate, it probably is, for whatever reason.
#18
Junior Member
Thread Starter
I should have mentioned this earlier. I was able to get my Jeep started twice yesterday and it ran just fine. No clue what did it. I was fiddling around with wiring trying to hunt down my P0122 and P1694 codes but never found anything. When I turned my key, it fired up. Drove around with no issues. Turned it off to grab lunch and it wouldn’t fire up later in the day.
This is another reason why I think my plate and CPS are ok. I’ll still try shimming my CPS though.
This is another reason why I think my plate and CPS are ok. I’ll still try shimming my CPS though.
Thread
Thread Starter
Forum
Replies
Last Post
ryan woodall
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
03-29-2010 10:04 AM
Crazythingsido2
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
19
09-13-2009 09:37 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)