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1998 Dakota 5.2l starts then stalls within seconds

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Old Nov 9, 2019 | 08:39 AM
  #11  
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For fuel sync, you absolutely must have a scanner that can read it to set it properly. You can get it 'close' with the method described in the service manual. (which I think you can download from somewhere around here??)

Does the fuel pump prime when you first turn the key on? You are evidently getting spark...... so, yeah, fueling issue. Is there a security system on the truck??
 
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Old Nov 9, 2019 | 07:06 PM
  #12  
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Default start from scratch

thanks for your reply, since the mechanic walked on me, previously i was told the fuel system was good, now i dont know. i need to go back to basics, fuel, spark - boom. there is a security system on the vehicle, yet i get no lights on dash verfying that. i did see a light saying "no buss"
back to the basics, i will get back on the fuel question, thanks
 
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Old Nov 10, 2019 | 03:56 AM
  #13  
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Default things have gotten deeper

here was no fuel pump working, dropped the tank and will nbe checking if the pump is still pumpable. while looking at the service manual i checked all the fuses and came across a couple of questions.
1. i saw where the dakota is the only vehicle that is supposed to have an electric fan for the radiator, the one on the vehicle has a temperature controlled clutch fan, and there is only one blade in the slot where the fuse should be, is this an acceptable configuretion? would it impact the starting since it may have impact on the PCM?
2. i should be aable to check the fuel pump out of the fuel tank by placing in a tub of water, with a ground where the black would input and hot lead (12V?) where the green/blk connector would plug in, correct? when completed i would ensure all water was removed prior to placing it in service
3. i have several different types of fuses, i didnt realize the difference in these particulr 30 amps until i was trying to install them (attached) are you familiar with what the difference for which they are used?
all 30 amps, one type has long slot on bottom, yet different type of top (one flat, one domed) another has short slot on bottom and cant be installed in PDC, and the last one is 30 amps but skinnier and shorter (hope the pictures come thru)

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Old Nov 10, 2019 | 09:16 PM
  #14  
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98 5.2 should not have electric fan, only 00+ (all models) and the 2.5's i think had one?
 
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Old Nov 11, 2019 | 05:48 AM
  #15  
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Default thanx

just wanting to ensure configuration was up to date
 
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Old Nov 15, 2019 | 05:16 PM
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Jump the relay for the fuel pump, and check and see if you are getting power back there. If you are, plug in the pump, doesn't need to be in anything at all, see if the pump runs when you turn the key on. (or, have someone else turn the key on....)

If you need fuses, take your dead one to the parts store, they will be able to match it up for you. Lots of different types..... no clue why the manufacturers felt they needed to do it that way.
 
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Old Nov 16, 2019 | 05:24 AM
  #17  
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Default fuses


why the different style 30 amp fuses?
i was asking about the fuses as a general question, i have the correct fuse, i was hoping you would be able to explain the reason for the diffetence in fuses, or possibly another member of the forum would be able to answer . thanks for your help.
how would i ask a question such as that to the complete forum?

four different 30 amp fuses, what is the different uses?
 
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Old Nov 16, 2019 | 08:59 AM
  #18  
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I think part of it has to do with how quickly the fuse will blow. Some will allow a greater amount of current, for a short period of time, than they are actually rated for. Others, will blow as soon as the load exceeds their rating. Other differences are simply because the manufacturer wanted them to be different...... Which seems like a bad idea to me, but, no one consults me when designing electrical systems for their cars/trucks.
 
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Old Jan 1, 2020 | 10:17 PM
  #19  
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Default fuel, no spark - no boom

i have been trying different fixes to get this 1999 Dakota to start, forgive me for not keeping up with the thread, i finally got power to the Fuel pump by running a direct line to it, now getting plenty of fuel at the rail. Now I've lost the spark from the coil. Checked resistance at the primary (1K) and secondary (12K) of the coil seems good per the manual, placed a direct positive line to the input of the coil and i still have no spark coming from the coil
 
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Old Jan 1, 2020 | 11:09 PM
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I think you have a problem "upstream"

The Ignition Coil, Fuel Injectors, and Fuel Pump all get 12 volts from the same place: The ASD Relay. (the fuel pump relay just disconnects the FP from the ASD for redundancy).

If the ASD relay is not triggered, then all 3 circuits will not get power.

If you've had to jump power for both FP and Coil, then please identify where you are sourcing it from. Sounds to me like your ASD relay is bad, -OR- The PCM circuit that activates the ASD relay has failed.
 
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