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Gustave
Dodge Dakota
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6/09/2006
20:55:47

Subject: Ignition problem
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I got a 94 dakota that refuse to start. I think that is a fire problem and I like to know how to test it right. No check engine when key on. Am'I supose to have 12v in 1 of 2 wire of the ignition coil input? If yes, What can be my problem if I don't have 12v? How many Ohms a good coil have between 2 pines and 1 pine and out? Anything else I can test?



Scott C
Dodge Dakota
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6/09/2006
22:29:45

RE: Ignition problem
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well if you have no check engine light during turning the key to run position the ECM might not be getting power... check ECM fuse to see if its good.... im not sure but on some vehicle the ECM fuse can be good but the light in the dash for the check engine light could be blown out and what happens is that circuit isnt being completed and ECM shuts down and car or truck might not start or run right at all.... in your distributer there is a cam/crank sensor that sends the provided signal needed to the computer so the injectors and coil fire at the correct time to each cylinder.... the coil plug i believe on wire is hot and the other wire gets a pulse signal to fire the coil as the engine is being cranked or as its runnin.....


Scott C
Royal Auto



J and J Auto
GenII
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6/09/2006
22:36:56

RE: Ignition problem
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Pin 3 power all the time
pin 9 power on off with key

coil
1 wire while cranking around 6 to 8 volt steady
2nd wire will pulse up and down on volts

when it does not start are the plugs getting wet
if not you may have the splice prob a red wire
that is spliced to 3 or 4 others about a foot
back from the power dist box under hood
you will know this as soon as you check pin 3 and
9 a common prob on the G2 trucks

looking down from over pass side fender #1 is
the top left just count over

Larry
J&J Auto

Gustave
Dodge Dakota
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6/14/2006
10:24:36

RE: Ignition problem
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I've check the coil and it's looking good. When cranking, I got 8.5 volt in 1 pin and the voltage wave on the 2nd one (0-3 volt). In the plug on the pass. side box, 12 volt on pin 3 and 9. The truck finally start, I close the hood and it don't wanna start again :( Got an Idea?



zzark
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6/14/2006
19:32:14

RE: Ignition problem
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Message:
Yeah, what Larry said.



Dan M
Dodge Dakota
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6/15/2006
04:29:25

RE: Ignition problem
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Sounds like you have a grounding problem. Check the grounds at the pcm first. I had a similar problem with my old 95. Truck would start, if i dropped the hood "hard" it would cut out and/or die. On the 95 on the PCM there are 2 black/tan wires pins 11 and 12. using socket disconnect the connector and test with a multi meter.

1 of the 2 grounds was lose, I got my wife to help me, I held the multi memter and listned for sound for continuity while she expoxied it. Let it dry, no more issues.

Could be other grounds, i'd start with pcm first though.

- Dan M



Gustave
Dodge Dakota
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6/15/2006
09:59:56

RE: Ignition problem
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Thanks all for helping me!!
All my ground seem to be good. With my multimeter, I've check the pins 11, 12, ground at the alternator, ... Everything looks ok.
Really don't know what to do now.
Allready check
-Power in to PCM (pins 3 and 9)
-Coil
-Ground
What's next?




daddio
Dodge Dakota
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6/15/2006
10:38:08

RE: Ignition problem
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iw ould check that splice as larry mentioned. just below the power dist. box. peel the wrap back and check for corrosion at the connection. it may have been making contact when you checked pins 3 & 9 and when you closed the hood it lost connection.



J and J Auto
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6/19/2006
22:32:39

RE: Ignition problem
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if you lose power to pin 3 or 9 even temp
nothing will work and it will not start or give
any codes

yes check grounds engine to fire wall back of
motor engine comp ground behind alt if these
4 are ok and nothing else wrong it will start

leaning towards the splice or a bad coil will
also act like this I have had bad coils do
very strange things like shutting down under
excelleration feeling like the trans was jumping
in and out of gear

very rough cold starts sounding like it had a very
hot cam once warm ran fine they do weird things

The stranges one was a pluged cat causing the
speedo to not work and fluctuate up and down
while crusing and the cruse controll not working
replaced the cat and all was fine I think that was
the werdest one but these comp controled vehicles
will do some very starnge things they also do not
switch things with the 12 volt power side but they
turn the ground sides on and off may have
something to do with some of the strange things
that go on once in a while that has everyone in
the shop scratching there head and pulling there
hair out only to find something so simple wrong
one would never have thought was the problem
LOL LOL this happens about once a year

we have had some that took over a week to figure
out but we don't charge the customer for a weeks
labor we just chalk it up to a new learning exp

Larry
J&J Auto

Gustave
Dodge Dakota
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7/19/2006
11:11:22

RE: Ignition problem
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Back to the problem...
About the two pines plug to the coil:
Now having about 9 volt on first one, and nothing on 2nd one (no waving voltage).
Don't know if it's mather, but the PCM make a low noise whene key is on



J and J Auto
GenII
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7/25/2006
01:49:10

RE: Ignition problem
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If you have power on pin 3 and 9 good grounds and
power to the coil but no signal I would lean
towards the crank sensor

If the comp recieves no ref signal to tell it
where to fire from the ring and crank sensor
the comp will send no signal to the coil because
it will not know where the motor is instead of
fireing at the wrong time it will not fire at all

here again if it was running than shut off than
going to restart no crank signal if it does not
start and run there will be no trouble codes

You say you checked the pins than it started
here is another thing check the connection on
the crank sensor also remve the plug from the
comp it may be caroaded you messing around
wiggled it enough to make connection and it
started

5/16 socket unscrew comp plug and look it may
be green caroaded clean plug back in tighten
down and try to start it

Larry
J&J Auto

nopowrmopar
Dodge Dakota
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7/26/2006
09:00:24

RE: Ignition problem
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My truck had been starting hard last couple of days and now just get clicking sound when turning key. It will start with jump but turns much slower than normal. I know for a fact the battery is good.Before i replace the starter I need some help understanding fault code.4 flashes pause 1 flash. Haynes manual say "charging system excess or lack of field current". What is charging system excess?



Bob Lincoln
Dodge Dakota
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7/26/2006
09:33:17

RE: Ignition problem
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"charging system, excess or lack of field current". The comma makes the difference.



nopowrmopar
Dodge Dakota
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7/26/2006
09:46:00

RE: Ignition problem
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Message:
Thanks Bob, My book actually has no comma but it makes more sense when put that way. I was reading it with comma after "excess". In either case what could make excess field current?



Bob Lincoln
Dodge Dakota
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7/27/2006
08:25:33

RE: Ignition problem
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Message:
Bad voltage regulation (in the SBEC), or bad wiring connections.



brian bearden
Dodge Dakota
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8/02/2023
10:34:25

RE: Ignition problem
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Message:
when i hook the neg cable to battery the trucjk will
start to craNCK WITHOUT PUT THE KEY IN'





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