gville38 Posted July 28, 2011 Share Posted July 28, 2011 hello i have a 1988 mj that is having a ignition problem it will turn over fine but no fire wondering if this is a common occurance or do i have a problem within the ecu any help or previous threads will help Link to comment Share on other sites More sharing options...
gville38 Posted July 28, 2011 Author Share Posted July 28, 2011 tried a couple things it will start if we push it off and dump the clutch and stays running ?? any help would be appreciated Link to comment Share on other sites More sharing options...
maddzz1 Posted July 29, 2011 Share Posted July 29, 2011 Does a manual have a CPS? Link to comment Share on other sites More sharing options...
Eagle Posted July 30, 2011 Share Posted July 30, 2011 Does a manual have a CPS? Yes, but if the CPS was bad it probably wouldn't start by rolling it and dumping the clutch. Otherwise, the CPS would have been my first guess. Link to comment Share on other sites More sharing options...
jimoshel Posted July 30, 2011 Share Posted July 30, 2011 Check the ignition switch and starter relay. Apparently it will start when pushed, ign sw is on, but will not start when ion sw is in 'start'. Ign sw and starter relay is only things common to both circuits. Link to comment Share on other sites More sharing options...
Randy in Maine Posted August 11, 2011 Share Posted August 11, 2011 I don't wish to hijack this thread, but my starter just emits one "click"and does not turn the engine over. I can push start it, pop the clutch, and it runs fine. Just no start through the key. I have correct voltage at the battery, starter is acutally good, cables clean and tight. If there is a starter relay in here someplace, could someone tell me where it is, and just what it looks like? What is the test to test it? I am not sure just what the ceramic looking resister over on the drivers fender is for, but the connections to it (the orange/black and orange wires) are good clean and tight. Thank you! Link to comment Share on other sites More sharing options...
ComancheKid45 Posted August 11, 2011 Share Posted August 11, 2011 Sounds like a bad starter itself :dunno: Link to comment Share on other sites More sharing options...
Randy in Maine Posted August 11, 2011 Share Posted August 11, 2011 Oh and the starter is a nice new Bosch unit. I figured it was the bad thing so I replaced it first (even though the orignal is likely still good). The truck has about 200K on it and it was the original. I am replacing the battery cables tonight with the new good ones since they are original also. When I put the new starter in, I also put some "De-Ox" on the terminals including where the little green wire attaches to try to keep that getting good voltage also. Link to comment Share on other sites More sharing options...
jimoshel Posted August 11, 2011 Share Posted August 11, 2011 Unfortunately just because something is new is no guarantee it's good. Don't know how much stuff I've took out the box that didn't work. If the starter is mounted run a hot lead direct to the starter terminal from the bat pos. If the starter now works, then the problem is the relay or connection. If the starter is off, hook a cable from the bat neg to the starter frame. Hook another wire from the bat pos to the starter terminal. It should run. It will jerk so have a good hold on it or have it clamped down. That ceramic thing is a resistor in the fuel pump circuit. Has nothing to do with the starter problem. Link to comment Share on other sites More sharing options...
Randy in Maine Posted August 12, 2011 Share Posted August 12, 2011 Very good. I am hoping the new cables will solve my problem. Why do they seem to rot out under the sheath so you cannot see there is a problem? (Rhetorical question..no answer needed) Do these things even have a starter relay and if they do where is it located? :dunno: Link to comment Share on other sites More sharing options...
jimoshel Posted August 12, 2011 Share Posted August 12, 2011 It's sitting right in front of the battery. There is a 8 gauge wire coming off the battery pos about 10 inches long going direct to it. Very top terminal. Link to comment Share on other sites More sharing options...
Randy in Maine Posted August 12, 2011 Share Posted August 12, 2011 It's sitting right in front of the battery. There is a 8 gauge wire coming off the battery pos about 10 inches long going direct to it. Very top terminal. Very good. I will be poking around in there this weekend. Thank you. This little truck is actually a pretty good little daily driver. I have had it for about 10 years now, put about 100K on it, and really have done little to the engine side of things. It still gets 21 mpg and drives well down the road. I will post my "fix" when that happens. Link to comment Share on other sites More sharing options...
JeffN Posted August 12, 2011 Share Posted August 12, 2011 referring to the first post check that you are getting power out of the ignition switch when in crank mode Link to comment Share on other sites More sharing options...
Geonovast Posted August 12, 2011 Share Posted August 12, 2011 The CPS has to see a certain speed before the ECU will turn on spark. The starter may just not be spinning it fast enough. Link to comment Share on other sites More sharing options...
Randy in Maine Posted August 13, 2011 Share Posted August 13, 2011 I will post my "fix" when that happens. Not sure what the problem, was but I replaced the battery cables (the pos was pretty corroded on the inside) and cleaned the connections at the starter relay. She fired right up. Thanks! Link to comment Share on other sites More sharing options...
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