[bannybear78]

Idk what is wrong with the truck. I have a 93 dodge Dakota, auto with a 3.9 V6. Dang near everything under the hood has been replaced. It seems like the carburetor might be acting up. Sometimes spraying it starts it up but the truck backfires and does a jerking motion when it warms up when driving as it shifts gears and spurts and sputters and will die when sitting at a light or just sitting unless you keep reving it some. However today it wouldn’t start like it should’ve. Let’s see if I can remember what has been replaced. Fuel pump and filter, and yes it gets good pressure, tires including spare, alternator, plugs/wires, rack & pin, front shocks, brake pads, water pump, rotor & distributor, believe also the thermostat/O2 sensor, light bulbs, window motor. Etc..if anything else. But only thing we can figure is carburetor or the coil needs to be relocated if it’s getting too hot. Also air filter cover has been replaced. And another water reservoir tank I guess..? Lol.. anyway, we can’t figure it out. I’m trying to sell as is cause I’m tired of working on it and am a ikr to move so I can’t take it with me anyway. So any ideas what it could be? Thanks.

 

[immattj]

Here is a thread that might give you some new ideas

1993 dakota no start but fuel and spark

Got a 1993 dodge Dakota V6 3.9L. Died suddenly while driving. Confirmed that I have spark on all plugs. But did go ahead and replace all plugs, wires, and distributor cap. Can hear fuel pump prime but did go ahead and connect gauge to fuel port and has 40psi. Manually connected 12v and ground to...

www.dakotaforumz.com

the OP had a '93 with 3.9 that would start & die and he checked & replaced a lot of stuff in the course of this extended discussion.
Almost by accident he discovered (when he was troubleshooting his EGR) that he had a near total blockage in the exhaust.
Which is not to say that I automatically think this applies to yours . . . but a lot of checks were made and a lot of systems were discussed, so maybe you might stumble across something helpful here. . . .

 

[richardrayfeury]

Have you checked your TDC?
Timing may have jumped a tooth.
Also conduct a compression test.
No parts need to be thrown at an engine before completely troubleshooting it first!
Good luck

 

[pcuthbertson52]

Idk what is wrong with the truck. I have a 93 dodge Dakota, auto with a 3.9 V6. Dang near everything under the hood has been replaced. It seems like the carburetor might be acting up. Sometimes spraying it starts it up but the truck backfires and does a jerking motion when it warms up when driving as it shifts gears and spurts and sputters and will die when sitting at a light or just sitting unless you keep reving it some. However today it wouldn’t start like it should’ve. Let’s see if I can remember what has been replaced. Fuel pump and filter, and yes it gets good pressure, tires including spare, alternator, plugs/wires, rack & pin, front shocks, brake pads, water pump, rotor & distributor, believe also the thermostat/O2 sensor, light bulbs, window motor. Etc..if anything else. But only thing we can figure is carburetor or the coil needs to be relocated if it’s getting too hot. Also air filter cover has been replaced. And another water reservoir tank I guess..? Lol.. anyway, we can’t figure it out. I’m trying to sell as is cause I’m tired of working on it and am a ikr to move so I can’t take it with me anyway. So any ideas what it could be? Thanks.

Crankshaft or camshaft sensor. will run OK then die for no reason. Crankshaft sensor is a bitch to change witout the right tools