QuestionQUESTION: i have a 95 3.3 ltr intrepid and i cant seem to figure out why i have no spark ive changed the crank sensor and cam and coil pack and still nothing its getting fuel but still no spark i live out in the middle of nowhere so im in need of desperate help do u have any ideas what could be wrong???????
ANSWER: Hi John,
Have you tried the ignition key for fault codes? "on-off-on-off-on and leave on" doing that in 5 seconds or less elapsed time. Then watch the check engine light, which remains 'on', to begin to flash, pause, flash, etc. Count the number of flashes before each pause. Then repeat to be sure of an accurate count. Then write back with the counts, in the order in which they appeared. We'll go from there.
Also, let me know if you have a voltmeter so I can tell you about trouble-shooting for why no spark.
Roland
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QUESTION: i did what you said and i got 1-2-3-3-5-4-5-5 and yes i have a voltmeter
ANSWER: The relevant code is 54 which says the engine controller is not getting a signal from the cam sensor. You can check its function and wiring as follows:
with the ingnition 'on' you should see 8 volts on the orange wire as compared to ground. If not, then check the orange wire between the sensor and pin 7 of the engine controller plug for continuity. Then if that is OK, measure the voltage between the tan/yellow wire and the black/light blue wires of the sensor when while you rotate the engine by hand using a socket on the crank pulley bolt. It should oscillate between 5 and 0.3V several times per revolution. You can measure the voltages by inserting fine pins through the insulation at the plug of the sensor and attaching the voltmeter leads to the pins.
Just in case you might try disconnecting the battery for a few seconds, then try to start it again a couple of time and see if you still get the same set of codes, this just in case the code is historic and reflects a situation prior to replacing the cam sensor. Such codes don't self-erase normally until 50-100 key on-off cycles.
If you still ger the 54, then there is something the matter with the cam sensor or its wiring which would be a good reason for no spark.
Roland
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QUESTION: hi roland i tested my wires with a voltmeter like you said but when i do it just gos full open way over 10 volts could i have a bad ground somwhere
AnswerJohn,
There should be no 12V connections to the crank or the cam sensor wires. Maybe the computer which generates the 8v is not grounded or failed, but I doubt that. The orange wire should show 8V. That is the operating voltage of those two sensor. Are you measuring between the pin piercing the orange wire and the battery - clamp (or the engine block/head) which are 'ground'? Then measure between the other two wires of the sensor while you turn the engine with a socket and handle.
All these of course are with the ignition in the 'run' position. I can't explain why you would have more than 10 volts on the orange wire unless your meter is inaccurate or there is something wrong with the computer (but don't jump to that conclusion). Try measuring between the other two wires on the sensor and see if you get the pulsing that I described or not.
Roland
