jeep stuff Posted January 28, 2010 Share Posted January 28, 2010 i have a 1998 grand cherokee with a 5.2l and yesterday it just died when i was doing 70 on the freeway. its not getting spark does anyone have any ideas i have been trying all day fuse is good switched relays ran a jumper wire from batterie to it and still have no spark bad coil? Quote Link to comment Share on other sites More sharing options...
richasco Posted January 29, 2010 Share Posted January 29, 2010 There are a handful of sensors that could have failed to cause the problem. It's OBD II, so hook up a scanner and let the computer tell you what's wrong. Quote Link to comment Share on other sites More sharing options...
Geonovast Posted January 29, 2010 Share Posted January 29, 2010 CPS Quote Link to comment Share on other sites More sharing options...
jeep stuff Posted January 29, 2010 Author Share Posted January 29, 2010 alright thanks Quote Link to comment Share on other sites More sharing options...
jeep stuff Posted January 29, 2010 Author Share Posted January 29, 2010 does that just happen as your driveing down the road? or can i just hook it up to a switch Quote Link to comment Share on other sites More sharing options...
Geonovast Posted January 29, 2010 Share Posted January 29, 2010 CPS is what tells the computer when the pistons are in the right place so it can fire the spark. You can't bypass it, you can't hook it up to a switch. Yes, it can die in the middle of the road like that. Doesn't mean that's what it is, but it could be. Quote Link to comment Share on other sites More sharing options...
kro10000 Posted January 29, 2010 Share Posted January 29, 2010 Had the same issue with my 5.2 dakota, went through a ton of work replacing parts, until in a last ditch effort i replaced the coil... fired right up... replace that first Quote Link to comment Share on other sites More sharing options...
jeep stuff Posted January 29, 2010 Author Share Posted January 29, 2010 alright thanks for the helpfull advice Quote Link to comment Share on other sites More sharing options...
kro10000 Posted February 5, 2010 Share Posted February 5, 2010 update? Quote Link to comment Share on other sites More sharing options...
one_bad_MJ Posted February 5, 2010 Share Posted February 5, 2010 CPS \ x2 crank sensor spray the inspection hole with carb or brake cleaner it will blow the oil off of it and it will run again. Quote Link to comment Share on other sites More sharing options...
jeep stuff Posted February 16, 2010 Author Share Posted February 16, 2010 that worked thanks my comanche looks the same as yours Quote Link to comment Share on other sites More sharing options...
aemsee Posted February 16, 2010 Share Posted February 16, 2010 CPS \ x2 crank sensor spray the inspection hole with carb or brake cleaner it will blow the oil off of it and it will run again. Crank sensor in a 98 5.2 is a hall effect sensor. would work if submerged in oil. It is also possibly the worst sensor to get at I have ever seen. Quote Link to comment Share on other sites More sharing options...
aemsee Posted February 16, 2010 Share Posted February 16, 2010 that worked thanks my comanche looks the same as yours what worked? coil, sensor or spraying it with carb cleaner? If it fired up when you sprayed it, it IS going to crap out again. Quote Link to comment Share on other sites More sharing options...
jeep stuff Posted February 16, 2010 Author Share Posted February 16, 2010 it fired up but i havent driven it been driveing my comanche but what do you think the other half of the problem is Quote Link to comment Share on other sites More sharing options...
Eagle Posted February 17, 2010 Share Posted February 17, 2010 it fired up but i havent driven it been driveing my comanche but what do you think the other half of the problem is What other half? It died, it started. What else? Quote Link to comment Share on other sites More sharing options...
jeep stuff Posted February 17, 2010 Author Share Posted February 17, 2010 i didnt take it for a test drive so i don't know if its fixed it just ran for a couple min Quote Link to comment Share on other sites More sharing options...
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