1999 Dodge Dakota NO SPARK

mh25 · Posted at Sat Jul 04, 2009 2:55 pm

Electrical problem
1999 Dodge Dakota 6 cyl Four Wheel Drive Automatic 120000 miles

My truck started to idle rough and stall one day. When it stalled I would have to wait an hour or so for it to cool down before it would start again. I brought it to the Garage and the mechanic hooked it up to diagnostics and it said the O2 sensor was bad. I drove the truck home and parked it in my driveway. The next day it wouldnt start. I have looked at it briefly and noticed that there is no power to the coil. Can anybody help me out? Where do I look next?

I know the truck also requires a speed sensor but I am pretty sure that would have nothing to do with my spark issues

rasmataz · Posted at Sat Jul 04, 2009 4:39 pm

The auto shutdown relay powers the coil's primary circuit thru the dark green and orange wire on the coil. Check for power on the coil's positive terminal if there's power, check and test the camshaft and crankshaft position sensor

mh25 · Posted at Sat Jul 04, 2009 7:34 pm

How can I test the crand and camshaft sensor to prove they are good or bad?

rasmataz · Posted at Sat Jul 04, 2009 9:26 pm

You need to check its resistances

mh25 · Posted at Sun Jul 05, 2009 2:49 am

Do you know the resistance values I should be looking for to prove them?

rasmataz · Posted at Sun Jul 05, 2009 10:03 am

The next day it wouldnt start. I have looked at it briefly and noticed that there is no power to the coil.

When you said no power -did you meant no battery voltage to the coil or no spark coming out of the coil.

Try unplugging the camshaft sensor and crank engine over and see what happens

Scan the computer for code/s and comeback if there's any-

mh25 · Posted at Mon Jul 06, 2009 8:06 am

OK, I disconnected the battery to charge it over night (I drained teh batery trying to troubleshoot it) When I hooked up the battery and cranked it over it fired right up. It would idle rough. When put in gear it would stall unless i gave it some gas right away to keep the RPM above 1000. I let it idle for 10 mins and shut it off. Tried to restart it and it started fine. Then, I shut it down and tried to start 10 mins later...it wouldnt start. What is my problem now? could this be a PCM issue?

rasmataz · Posted at Mon Jul 06, 2009 1:32 pm

Verify the fuel pressure fuel pump could be failing and also test the ASD relay