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Driveline Transmissions, Differentials, Axles, Bearings, etc. This forum covers the entire driveline from the Transmission to the wheel bearings!

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  #31  
Old 05-06-2018, 12:29 AM
1991 Dakota 318 1991 Dakota 318 is offline
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Vehicle: 1991 Dodge Dakota 4x4
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I used a regulator for a 93 Dakota. I was wondering if there was a way of blocking off the return line to figure out where the leak is going. It looks like a steel/steel braided line all the way back to the tank. I took all the spark plugs out and found 6 to be drenched in gas. I cleaned them and it kind of stumbled for a bit, but didn’t take long before it died and didn’t want to start.
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  #32  
Old 05-06-2018, 01:57 AM
RalphP RalphP is offline
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Vehicle: 1988 Dodge Dakota SE
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Engine: 1987-1991 - 3.9 L (238 cu in) LA V6, 125 hp (93 kW)
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You could use a pair of pliers and crimp them off and see if it slows the drop in pressure.

But six of the eight were drenched? Sounds like you may have sticking injectors. You've got one that's not firing at all, and I bet it was one of the two NOT drenched.

RwP
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  #33  
Old 05-06-2018, 09:53 PM
1991 Dakota 318 1991 Dakota 318 is offline
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Join Date: Nov 2015
Posts: 80
Vehicle: 1991 Dodge Dakota 4x4
Trim Level: LE
Color: red and white
Engine: 1991 - 5.2 L (318 cu in) LA V8, 170 hp (130 kW)
Rep Power: 3
Rep:10
1991 Dakota 318 is on a distinguished road
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Pinched off the return line, and it held pressure. Replaced the regulator and now it’s holding pressure. It still doesn’t start. It does have spark, so now either my uncle is somehow right, and the O2 sensor needs to be plugged in, or I got a bad set of injectors. The fuel pressure did drop about 4 psi in 15 mins but that shouldn’t cause a no start situation.
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  #34  
Old 05-08-2018, 03:17 AM
RalphP RalphP is offline
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Vehicle: 1988 Dodge Dakota SE
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Rep Power: 4
Rep:32
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The O2 doesn't need to be plugged in to start; it's not even in usage on a cold start!

So. Injector sync, injector fire, and possibly bad injectors. I see you get spark.

RwP
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  #35  
Old 05-13-2018, 05:18 AM
1991 Dakota 318 1991 Dakota 318 is offline
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Join Date: Nov 2015
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Vehicle: 1991 Dodge Dakota 4x4
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Color: red and white
Engine: 1991 - 5.2 L (318 cu in) LA V8, 170 hp (130 kW)
Rep Power: 3
Rep:10
1991 Dakota 318 is on a distinguished road
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I put in injectors from the parts truck which ran good before I dismantled it, and transferred it to my truck and she still doesn’t start. Still acts like it’s flooding the motor. The noid light blinks, it has spark, it has good fuel pressure. The only other possibility I could think of is if the injectors are not firing at the right time. I didn’t mark the fuel injector connectors, but I did look at the wiring harness from a 94 Dakota I pulled from the salvage yard, which still had all the labels intact, and found that they never cross each other and verified the order with the one on my truck. How would you know if the injector is firing at the right time? I could get the noid light and see if it flashes before I get spark and try to view where tdc is at with a timing light?
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  #36  
Old 05-13-2018, 03:30 PM
RalphP RalphP is offline
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Join Date: Dec 2014
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Vehicle: 1988 Dodge Dakota SE
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Rep Power: 4
Rep:32
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Try following the steps here:

http://www.hughesengines.com/Upload/...ons/DistRR.pdf

RwP
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  #37  
Old 05-17-2018, 01:13 AM
1991 Dakota 318 1991 Dakota 318 is offline
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Join Date: Nov 2015
Posts: 80
Vehicle: 1991 Dodge Dakota 4x4
Trim Level: LE
Color: red and white
Engine: 1991 - 5.2 L (318 cu in) LA V8, 170 hp (130 kW)
Rep Power: 3
Rep:10
1991 Dakota 318 is on a distinguished road
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It appears the little screw driver slot for the distributer in the distributer shaft is at the 11-5 position like described in the text. It was a great answer as I never payed attention to where it went in, just made sure the rotor was pointing at the #1 cylinder. It just mysteriously doesn’t want to run. Has spark, fuel, and compression, all the things you need to run, yet it just doesn’t run.
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  #38  
Old 05-18-2018, 11:14 PM
1991 Dakota 318 1991 Dakota 318 is offline
Dodge Dakota Forum Senior Member!
 
Join Date: Nov 2015
Posts: 80
Vehicle: 1991 Dodge Dakota 4x4
Trim Level: LE
Color: red and white
Engine: 1991 - 5.2 L (318 cu in) LA V8, 170 hp (130 kW)
Rep Power: 3
Rep:10
1991 Dakota 318 is on a distinguished road
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It was a bad distributer, spark was like very weak at the cylinders, but good at the coil. I swapped it with the distributer from the parts truck and she runs great, except now it has a dead miss. I felt the exhaust, and the exhaust manifold at the #2 cylinder felt cold, the same cylinder that was getting no signal for the injector. I pulled off the connectors for #2 and #4 injectors. I unbolted the pcm connector, and looked at the color of wires. I noticed a pink/green wire ran to all of them. I assume that’s the ground wire, I found that wire at the pcm connector, and hooked the black lead to the dmm up to it. There was a tan wire at the injector to the #2 cylinder, than a blue/black wire to the #4 cylinder. I found both of those at the pcm and plugged in the noid light to each. The #4 cylinder read 3.6 ohms the #2 cylinder was at 3.7 ohms. Bad PCM?
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