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joe
Dodge Dakota
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3/14/2005
16:31:37

Subject: no spark/fuel
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I have a 94 dakota sport 2wd/stick (3.9)i have no spark and no fuel pressure also no
"check engine" light?? I bought a new (used) computer and still nothing anyone have any ideas?? I'm completely stump't



didya
Dodge Dakota
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3/14/2005
16:40:02

RE: no spark/fuel
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didya check your battery and fuses???



CP
Dodge Dakota
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3/14/2005
16:41:20

RE: no spark/fuel
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ASD relay? Swap out the relay with the other one in there and try it again. Check harness to be sure that it is seated. Check cam-position sensor. NO spark + NO gas pretty much points at the SMEC or the auto-shutdown relay. If the ASD is not dead, it's doing its job and swittched off the primary ignition voltage and the fuel pump. The only input sensor I can think of off hand to check is the CPS. I have read posts here that there is a harness under the relays that can get wet and corrode. What's been going on with the truck? Any recent service, accidents? New Computer (SMEC) could also be defective or incompatable.



joe
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3/14/2005
16:42:06

RE: no spark/fuel
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yes the bat. is fine and fuses are fine



joe
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3/14/2005
16:47:05

RE: no spark/fuel
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I have hooked a diagnostic computer up to it and it cant get a reading..(codes) all relays are fine the only relay that actually clicks is the starter relay the computer that i recently replaced is the exact same as the one taken out
the vehicle sat for a week and then .nothing like i said no spark no fuel pressure no check engine light and i have oil pressure...........thanks for replying so fast




joe
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3/14/2005
18:01:23

RE: no spark/fuel
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What i mean by "no check engine light" is, when you put the key in and to the "on" possition the check engine light is not on, not at all, not ever.............help!!



joe
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3/15/2005
15:51:53

RE: no spark/fuel
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bump



Ryan
Dodge Dakota
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3/16/2005
22:38:56

RE: no spark/fuel
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This sounds exactly like what happend to my 94 Dak. Same set up 3.9 w/ 5sp. Did the same thing was running fine then jsut shut off while it was warming up one night. Wouldn't start after that. I spent two days checking a bunch of stuff. FInally i found the auto shut down relay was bad after I swapped it out for the ABS relay. Then the truck fired right up. I know you said you checked them but it might be worth swapping them around again just to be sure.

Good luck with it.
Ryan



J and J Auto
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3/18/2005
05:46:37

RE: no spark/fuel
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about a foot back from the power dist box under
hood in the wire harnass there is a red wire that
goes to 3 smaller wires

Fuel
Ign
Comp

check pin 3 power all the time
pin 9 on off with key
be sure batt is connected when you check these and
you can plug and unplug the obd1 system with batt
connected and it will not harm the comp its just
like disconecting the bat pin 3 power all the time

on comp plug unplged top left #1 left to right
1, 2, 3, 4, 5, 6, 7, 8, 9,

If this is bad nothing will work it will show no
codes even with scanner and the scanner should
read not comunicating

Larry
J&J Auto

joe
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3/19/2005
13:46:04

RE: no spark/fuel
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the scanner did say not communicating. and all the relays were fine. the problem was (after i bought a new (used) computer), the splice about a foot from the relay/fuse box. All red w/white wires Yes 1 feeds puel pump 1 feeds coil 1 feeds computer. there was atotal of 4 wires. The splice was totally powdered copper. Respliced it it works great..........Anyone looking to buy a used computer (i'll guarantee it works)?? $150.00 .......u pay shipping .



Cliff
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3/28/2005
02:31:20

RE: no spark/fuel
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My 1993 Dakota parked in the drive way .Went to start it and it would crank but wouldn't start.I changed the pickup coil ,cap ,rotor button.No fire to coil or fuel pump.Auto shut down relay was swaped with starter relay.Still wouldn't start.Joe hit the nail on the head.The red/white wire where 3 go into 1 was powdered cooper.it was almost under distribution box.I soldered the wires together and that fixed the truck!!!!!!!! THANKS!!!!



joe
Dodge Dakota
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3/28/2005
08:36:32

RE: no spark/fuel
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this problem could possibly cost a whole lot a $$
but thanks to this forum it was easy to track down the problem thanks again!!



Scott
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10/19/2005
21:26:20

RE: no spark/fuel
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I'm having the no spark no fuel syndrome on my '90 Dakota and I'm searching for this splice. What exactly is the "power distribution box"? Does my '90 3.9 auto have it? Left or right side of engine comp?



Dan M
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10/19/2005
21:59:14

RE: no spark/fuel
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Scott,

It's probably on the driver side mounted to the side of the fender. It's the black fuse / relay box in the engine bay.

There will be a lot of wires running out of it, wrapped up. you 'll need to unbolt the box from the fender, unwrap the wires. You'll find 3 red/white wires spliced into 1 red/white wire. Redo that splice, solder is preferred.

- Dan M



Scott
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10/20/2005
22:31:45

RE: no spark/fuel
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Thanks, Dan M, for a timely reply. you saved me from digging too far into a freshly rewrapped harness. I just cleaned it up about a month ago- the old tape was frayed and dryrotted. Other '90 base model automatic 2WD 3.9 owners take note- my wiring appears to be different. After going cross-eyed looking for red and white spliced wires, I traced the primary positive ignition coil wire(wt/bk) to find it spliced with 4 grn/bk wires. 1 goes to the ASR, 1 to the fuel pump and 2 head back toward the SMEC. I THINK this is the splice you told of. I could not locate red and white. Also, the wires come out of the power distribution box in two bundles and go UP to the main east-west bundle @ the top of the fire wall. Anyway, this splice was is in perfect condition and aparently not the cause of my problem. I'm off to try another coil, as I beleive NAPA sold me the wrong one. If that doesn't get my truck going I guess its time to throw a reman SMEC at it. I've replaced the fuel pump, ASR, FPR, pick up and coil. Any suggestions would be greatly appreciated.



schmidtmike
Dodge Dakota
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10/20/2005
23:22:06

RE: no spark/fuel
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time to get out the good old wiring diagrams, scott



Scott
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10/20/2005
23:56:27

RE: no spark/fuel
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My only ref for this truck is my Haynes man. Can anyone suggest a better one?



daddio
Dodge Dakota
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10/21/2005
17:48:09

RE: no spark/fuel
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scott, check a post i just put up here titles TSB's and other info. that site has wiring diagrams that may help you.



Grant
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9/08/2016
18:22:18

RE: no spark/fuel
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I'm having the same no spark or
fuel on my 94 dakota 3.9 automatic
...changed the relays, crank
sensor, cam sensor, cap, rotor,
wires, plugs, Re-soldered the 3 to
1 red/white wite....I have no power
going to the coil or fuel
pump...any input would be
appreciated



R.E.
Dodge Dakota
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11/29/2016
19:59:15

RE: no spark/fuel
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had a heater core put in 98 dakota along with a
rack and pinion , got the truck back, it runs fine
for 10 minutes or so and shuts off. wont start
back..wait a couple hours and it will do same
thing.....any ideas to this....its the 3.9 slt
thanks



Max Moto
Dodge Dakota
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1/03/2017
00:08:58

RE: no spark/fuel
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I went through 3 weeks trying to get mine to
start. I did everything everyone said could be the
problem. The last thing left was the crankshaft
positioning sensor. The wire had been burnt in
half. Replaced the sensor , and it fired right
up.Hope this helps someone.



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