ironhead03 Posted January 1, 2009 Posted January 1, 2009 Does anyone live close to Ashtabula that would be willing to come to my house and help me fix my 89 MJ? I would gladly pay you to help me get my starting issues fixed. I have to crank it for several minutes to get it started. After it starts and runs for a minute if i shut it off it will start again in about 5 seconds of cranking. The starting issues have put a stop to my to do list for the winter on the truck.
Motion Offroad Posted January 1, 2009 Posted January 1, 2009 Jump the ballast resistor on the inside of the fender with a piece of wire. See if that solves the issue...
mvusse Posted January 1, 2009 Posted January 1, 2009 I wouldn't be surprised if you have one or more leaking injectors. With the truck off they will slowly bleed off the remaining pressure into the combustion chamber(s) and flood the engine. Do you have a lot of black (or blue) smoke ater it finally start
ironhead03 Posted January 2, 2009 Author Posted January 2, 2009 I have'nt checked the fuel pressure but it has a new pump in it. My wiring harness is not the orginal one, it does'nt have the ballast resistor. And it has new o-rings on the injectors and no smoke on start up. Sometimes it will do a loud backfire before it finally starts, but not to often.
BLHTAZ Posted January 2, 2009 Posted January 2, 2009 Could be a problem with the CPS. If you are gettng a backfire, that means the fuel is pumping through, but is not getting fire to burn it soon enough and when it does...boom...it goes all at once. Â It could be the CPS is dying and is slow to send its signal, could be trouble with cap, rotor, wires or plugs too. Possibly even the coil, but it really sounds to me like it's a fire problem...not fuel here.
Pete M Posted January 2, 2009 Posted January 2, 2009 I had a similar problem with my 86 and it turned out to be corrosion in the power wire that fed the coil. The spark was there, but very weak.
ironhead03 Posted January 3, 2009 Author Posted January 3, 2009 It has new cap,wires,rotor and plugs. I think i have an extra coil,i'll try changing it and spring for a new CPS. Could be a problem with the CPS. If you are gettng a backfire, that means the fuel is pumping through, but is not getting fire to burn it soon enough and when it does...boom...it goes all at once. It could be the CPS is dying and is slow to send its signal, could be trouble with cap, rotor, wires or plugs too. Possibly even the coil, but it really sounds to me like it's a fire problem...not fuel here.
Pete M Posted January 3, 2009 Posted January 3, 2009 Just for clarification, my coil was fine. It was the power wire feeding the coil that was bad. Make sure you check for corrosion at every connection.
ironhead03 Posted January 6, 2009 Author Posted January 6, 2009 I just read another thread about a crank sensor patch kit.Could this be my problem and is it something i can still buy?
BLHTAZ Posted January 6, 2009 Posted January 6, 2009 I just read another thread about a crank sensor patch kit.Could this be my problem and is it something i can still buy?Yes, it can still be purchased. The Chrysler part # is 83100066
ironhead03 Posted January 7, 2009 Author Posted January 7, 2009 Does it include a crank sensor,any idea how much it is? Thanks I just read another thread about a crank sensor patch kit.Could this be my problem and is it something i can still buy?Yes, it can still be purchased. The Chrysler part # is 83100066
BLHTAZ Posted January 7, 2009 Posted January 7, 2009 Yes...it includes the sensor and it should run around $115 - $120 IIRC.
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