Question about 1999 Dodge Ram
I parked my truck wednesday night and when I went out to start it on thursday morning it would not fire, the motor just keeps turning and turning. I didn't have a chance to look at it till that night. I went out and discharged the pressure on the fuel rail and tried to start it again, the fuel pump did re-pressurize the fuel rail. I then pulled one of the spark plug wires on the cap and set it to the side of the post and turned the motor over. I saw arc's so it looks like I am getting spark. As a last attempt I disconnected the battery for 30 minutes to let the computer reset itself, plugged it back up but still no go. Does anyone have any suggestions for me?
Here is a quick test you can perform to eliminate or confirm a problem with the TPS, MAP, Crank and Cam Sensors. A bad Crank or Cam sensor can cause a no start. You will need an Ohm meter.
The PCM has 3 connectors. Facing the controller from left to right, they are labeled C3,C2,and C1.
With the ignition off, disconnect C1. Set your meter for 2K ohms. Disconnect C1 and touch the test leads to pin 17 (5v) and pin 4 (sensor ground). (The pins are numbered) The ohm reading should be somewhere between 600 and 700 ohms. If you see less than 600 ohms start unplugging the sensors one at a time while testing. When you achieve 600 - 700 ohms you have found the defective sensor.
If your sensors are good, I would take the advice of rick7544 and swap out the ignition coil.
Hope this helps....
Posted on Dec 19, 2008
I had same problem.Take the coil off and look at the waxy/plastic bottom if it has a crack in the bottom moisture is getting into the coil giving you spark at times and no spark at other times. coil is $39.
Posted on Dec 18, 2008
THE SPARK SHOULD BE BRIGHT BLUE AND JUMP AT LEAST 1/4 IN. IF SPARK IS A YELLOW COLOR THE COIL IS WEAK AND NEEDS REPLACING
Posted on Dec 09, 2014
Same thing here! was getting fire at a test plug, that can be deceiving. Coil was the problem.
Posted on Mar 30, 2009
My truck is doing the same thing keeps turning over and not starting up. I brought it to a sears auto center for a diagnostics test. They said I need to replace my fuel pump and would suggest replacing my spark plugs. They wanted 900 for the fix, but I'm going to take it to a smaller shop tomorrow i'll let you know how it goes.
Posted on Jan 15, 2009
Try the timing belt
Posted on Dec 31, 2008
Sounds like a like an ECU/Antitheft problem, try the sparekey first(Chip might be broken) then im afraid youll need a "codereader"/Dealer after that;(
Posted on Nov 14, 2008
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Posted on Jan 02, 2017
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