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V8 Dakotas
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Dan Jones
Dodge Dakota
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7/27/2004
22:58:38
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 Subject: 91 5.2L fuel problem
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After starting, truck will run for about 7 to 10 minutes, then die. was watching the fuel injectors and just before it died, fuel stopped coming out of the injectors. This started about a year ago, only back then all I needed to do was hit the key and it would start up. Now if I let it sit, sonetimes for overnight or longer it might start. Had fuel pump checked, good. And can hear it running. I get no engine codes. Can anyone help? Thank You.
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Mike S.
Dodge Dakota
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7/28/2004
05:43:11
|  RE: 91 5.2L fuel problem
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I had the same thing happen to my 91 when it was still fuel injected. You wouldn't happen too have a Jet Module would you? My problem was the Jet module plugs in between the computer and wire harness and it was not making a good connection. If you have no Jet module, I would check the Hall Effect sensor that's in the distributor. The fuel and spark work hand in hand, so with out one you won't have the other. The Hall effect I picked up at Autozone for about 35 bucks. Also, if you haven't you might want to replace that inline fuel filter on the drivers side in about the center of the truck. Mine was clogged at 95,000 miles. Just my 2cents. Hope it helps you out.
Mike S.
91CC 390 w/nitrous
97CC 6er
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Dan Jones
Dodge Dakota
JOIN HERE
7/28/2004
12:19:12
| RE: 91 5.2L fuel problem
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Is the Hall Effect sensor the same as the crank shaft sensor?
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Ken
Dodge Dakota
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7/28/2004
13:58:09
| RE: 91 5.2L fuel problem
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Not sure if this may or may not be your problem, but picked this up from the FAQ at www.dakota-truck.net. Even if it's not your problem, good thing to check for on Gen 2 Dakotas as it's a common problem
Right below the underhood fusebox, about 8" down the harness is a splice (#115), from that splice, it powers the PCM, Fuel Pump, and Coil. All four wires are Red/white, one comes from the fusebox, two go right back up to the relays, and the fourth goes the opposite direction to the PCM. You will have to unbolt the fusebox, pull it out of the way, and cut open the tape on the harness to find the splice.
I guess what happens is that water gets into the fusebox, drains down the harness, and eventually corrodes the splice into green powder (oxidized copper). You cannot tell if it is bad by looking at it, you will have to cut the tape off of the splice and inspect the connection. If you see and green or white residue on the connection under the tape, it has started to go bad and needs to be re-done (preferably by soldering).
This problem can be very intermittent, sometimes just a single miss while cruising down the highway, sometimes just a long cranking time, mine was even sensitive to temperature (28-40F) and high humidity. The problem in my 94 Dak occurred intermittently 30+ times and over $1000 in parts over a year. Finally one day it just died in Toledo, luckily I was walking distance from Vin Devers Dodge. When I got there, they were closing in 5 minutes, one of the mechanics there said he new exactly what the problem was, grabbed some tools and drove me back to my truck to fix it, AFTER CLOSING TIME! This guy earned every penny CryCo pays him. Never had the problem since, 80,000 miles later.
My 95 Dak just refused to start one day after I replaced my 14x3 K&N with a 14x4 filter. When I was done it would not start! It was just a coincidence, as it turns out, but I sure was confused at the time. I checked the splice as a hunch after I could not get a voltage reading at the PCM. Sure enough, after I cut the harness to get a better look at I thought that the splice looked fine, but I gave it a little tug to get a closer look, and it snapped in half! Up until that time, I never had it die, it never stumbled, nothing. I even drove the truck the night before and never even a stumble.
A guy I work with also has a 93 Dak that had the exact same problems.
The point I'm tying to make is that this is a big problem on 92-95 Daks and you need to check it if you own one. Chances are if you ever drove in the rain, yours has already started corroding.
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