Plymouth

Tiny
KURTDAN
  • MEMBER
  • 1999 PLYMOUTH BREEZE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 94,000 MILES
1999 plymouth breeze 2.4l no spark on #1 and4 has new coil
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Sunday, January 30th, 2011 AT 12:50 AM

3 Replies

Tiny
CARADIODOC
  • EXPERT
If the Check Engine light is on, start by having the diagnostic fault codes read. If it comes up with "Cam and crank sync", first check the timing belt. At one tooth off, the Check Engine light will turn on. At two teeth off, the engine will shut down and typically one ignition coil will fire intermittently. At three teeth off, the open valves will hit the pistons as they coast to a stop. If the belt timing is correct, suspect a sheared-off dowel pin between the camshaft and its sprocket. This applies to the single overhead cam engine, not the dual cam engine.

Caradiodoc
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Sunday, January 30th, 2011 AT 1:09 AM
Tiny
KURTDAN
  • MEMBER
This car needed a w/p so bad I barely let it run, but think it ran rough. In order to do pump, had to r&r cam gears so I think pins r ok. New t-belt installed(am ase master tech and have done many of these. Not working now so used 1996 guide but think they're same)this is dual overhead cam. Runs but no spark#1, #4, has inj. Pulse to all. No codes. New coil, wires, plugs. Still same. Help
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Sunday, January 30th, 2011 AT 5:12 AM
Tiny
CARADIODOC
  • EXPERT
If you can borrow a Chrysler DRB3 scanner, it will let you fire the coils. That will show whether the Engine Computer has control of them and that the driver circuits are working. The fact there are no codes means the problem is with something that isn't monitored such as the coil secondary or the conditions needed to set the codes hasn't been met. Since you already replaced the coil, I guess I'd be considering a different computer. You could also look at the wire between the computer and coil. A corroded pin in a connector or a cut wire are possibilities. You also might try using an oscilloscope to view the signal on that wire. If there is none, view the waveforms coming from the cam and crank sensors.

Caradiodoc
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Monday, January 31st, 2011 AT 6:16 AM

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