Question about Plymouth Cars & Trucks
No fire to the coil? Does that vehicle even HAVE a coil, or is it a coil PACK? Just to make sure the Automatic Shutdown Relay is not at fault, disconnect the battery for 10-15 minutes, then reconnect it and try it again ... but LISTEN carefully for a "groan" of about 1-2 seconds when you turn the key ON but not far enough to crank the engine. That will tell you if the fuel pump works. If there is no sound, with the battery connected and with the key in the ON position, take a rubber mallet and strike the bottom of the fuel tank a few times, until you hear the fuel pump turn on, even if it's only a second or two. Then try to start the engine again. Good luck!
Posted on Apr 24, 2017
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Posted on Jan 02, 2017
In READING what you wrote, it appears that your car is difficult to start and pretty much is rough while running....It also appears that your are randomly replacing parts...How did you verify that the parts your have replaced had failed? I suggest you get a basic manual like chiltons or haynes as well as a decent digital volt/ohmeter, then do some testing. Pay close attention to map sensor test and manifold air temp. Having a good fuel pump does not insure that your injectors are clean enough to deliver a good spray pattern This will not show up on any test...you need to actually look at them. There are other items to look at but I think you will likely find your problem in what i mentioned. (you already checked for vacuum leaks, right?)
Posted on Jul 27, 2009
The coil pack unit's circuit #3 drives plugs #3 and #6 directly from the PCM. If the cam sensor was defective, it should not fire any plugs. Suspect bad wiring from the PCM to the coil pack, the PCM unit itself, or a segment of the camshaft position sensor surface has lost magnetism causing missing signal to the PCM. An oscilloscope is the best test instrument for chasing down a missing pulse problem. The missing timing signal also explains why the PCM would report a 'bad camshaft sensor'. Hope this helps!
Posted on May 12, 2010
Testimonial: "I appreciate the in depth explanation of what could cause those specific plugs not to fire. I was told to maybe try changing the crankshaft pos. sensor. I figure it can't hurt. Thanks a lot."
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