Orange88 Posted June 1, 2010 Share Posted June 1, 2010 i finally found a motor for my Comanche. i put it in this weekend i am having spark issues. i am not getting any spark. I am not getting any spark off the coil either. i have power going to my coil but nothing going from the coil to the distributor. i am stumped. :mad: i don't know enough about electrical to diagnose it. please help me guys! Link to comment Share on other sites More sharing options...
75sv1 Posted June 1, 2010 Share Posted June 1, 2010 i finally found a motor for my Comanche. i put it in this weekend i am having spark issues. i am not getting any spark. I am not getting any spark off the coil either. i have power going to my coil but nothing going from the coil to the distributor. i am stumped. :mad: i don't know enough about electrical to diagnose it. please help me guys! You might let us know what year Comacnhe you have. I'd look at GreatLakes XJ for a FSM for your year in a Cherokee. Or buy a FSM for yours. Two things, check that power is getting to the coil. Then check the coil itself. They do go bad. Tom Link to comment Share on other sites More sharing options...
bigd44889 Posted June 1, 2010 Share Posted June 1, 2010 most of the time it is the cps on the bell housing if u didn't take it out befor u changed the motor then i would bet u broke it :cheers: Link to comment Share on other sites More sharing options...
wranglercory Posted June 1, 2010 Share Posted June 1, 2010 I would check the coil I just this problem with mine. I swaped the coil out and fixed it right away then to test the old one I put it back in and then it wouldnt start again . I ended up leaving the one that worked in it and it has ran great since then. Link to comment Share on other sites More sharing options...
Unglar Posted June 1, 2010 Share Posted June 1, 2010 Welcome to the club! :thumbsup: If you update your profile with your location you might find someone close who can loan you a coil to test it. Link to comment Share on other sites More sharing options...
Oizarod115 Posted June 1, 2010 Share Posted June 1, 2010 most of the time it is the cps on the bell housing if u didn't take it out befor u changed the motor then i would bet u broke it :cheers: x2 gotta go back over what you just messed with first. Link to comment Share on other sites More sharing options...
STERLING STINGER Posted June 2, 2010 Share Posted June 2, 2010 most of the time it is the cps on the bell housing if u didn't take it out befor u changed the motor then i would bet u broke it :cheers: Just happened to me :agree: Link to comment Share on other sites More sharing options...
Orange88 Posted June 2, 2010 Author Share Posted June 2, 2010 well, i think i found out the reason why. just don't hate on me guys, i am new to the jeep world. turns out i bought and HO motor without knowing the difference. :wall: So now that the dang motor is in what all do i have to swap over to get it going again? Thanks for the help, i would really like to get this truck goin and drive it this summer. Keep the suggestions coming! Link to comment Share on other sites More sharing options...
Orange88 Posted June 2, 2010 Author Share Posted June 2, 2010 and my comanche is an 88 Link to comment Share on other sites More sharing options...
Unglar Posted June 2, 2010 Share Posted June 2, 2010 What year and specs on the HO motor donor? What all did you install, just the motor? You have to decide if your gonna upgrade to HO or stay with renix. Someone can chime in on staying with the Renix setup. I think for the HO your gonna need the engine harness and computer plus some other stuff. Link to comment Share on other sites More sharing options...
Orange88 Posted June 2, 2010 Author Share Posted June 2, 2010 the guy i bought the motor from said it was out of an 89 cherokee. i know its not now. i swapped over intake manifolds so it was all the same as my old plug ins. i imagine i am going to have to swap over distributors and what else? Link to comment Share on other sites More sharing options...
Unglar Posted June 2, 2010 Share Posted June 2, 2010 I beleive the Head is different between the Renix system and the HO system, but you should wait for someone else to comment who actually knows what they are talking about. ;) Link to comment Share on other sites More sharing options...
maddzz1 Posted June 2, 2010 Share Posted June 2, 2010 You are going to need the engine harness, dash harness, and you will also need to splice the wiring into the harness for the rear lights. I think there is a few more things you will need to. Ill see if i can find the write up This will help: viewtopic.php?f=9&t=7659 I think it matters what year the donor is from too. 91-95 or 96-01 To do an HO swap, you are better off just getting a complete donor XJ so you have all the parts. Finding a junk donor should be cheaper than gathering all the parts seperately. Link to comment Share on other sites More sharing options...
Geonovast Posted June 3, 2010 Share Posted June 3, 2010 If it is an HO motor, not only are the intake ports on the head different, but the flywheel is completely different. The CPS pickups are not the same, and will result in a no spark. You need to verify what motor you have. A build date should be stamped on the block, and there's a head casting number too. Link to comment Share on other sites More sharing options...
HOrnbrod Posted June 3, 2010 Share Posted June 3, 2010 :agree: You gotta ID what you have before the advice can flow. Here's how: Jeep heads are identified by a casting number on top of the head above the #4 exhaust port, on the manifold side. Year............Casting No 1987-90......2686 1991-95......7120 1996-98......0630 1999-06......0331 Blocks Year..... Casting No 1987-90 53005535 1991-95 53008405 1996-98 53020569 1997-?? 53010341 1999-04 53010449 Additional code info on dating blocks. This code is on the block below the spark plug holes. Example 401MX12 * 4 = Year (1994) * 01 = Month (January) * MX = Engine Type/Fuel System/Compression Ratio (MX is a 243 CID, multi-port fuel injection system with 8.8:1 ratio * 12 = Day of month of engine build Link to comment Share on other sites More sharing options...
Geonovast Posted June 3, 2010 Share Posted June 3, 2010 Hey now, that there 0331 started mid year. Both my 99 and my dad's 99 have the 0630. :cheers: Link to comment Share on other sites More sharing options...
HOrnbrod Posted June 3, 2010 Share Posted June 3, 2010 Hey Corry, as you know well, nothing's written in stone with these Jeep things. :D Link to comment Share on other sites More sharing options...
Orange88 Posted June 3, 2010 Author Share Posted June 3, 2010 ok, i will look at the build code and let you guys know. so you guys are tellin me that i can't just swap over my electrical stuff and it won't run? can i just put on the cps that went to the HO? damn, this thing is getting to be way too big of a headache :help: Link to comment Share on other sites More sharing options...
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