I am a beginner to this. I have a 1993 dakota 5.2 4x4 LE. Ran great before the work I did.

the work-
I just got done putting a M1 intake on it. I did all new gaskets and bolts. I moved the IAT sensor to the air filter housing (pre filter). I also moved one of the coolant sensors (the 2 wire one) to the upper rad hose and I did ground the housing the sensor screws into. I also replaced the stock injectors with 4 hole injectors. I also put in a new oil pressure sensing sensor.

my problem-
starts just fine. But if I hop in and go, I make it about a block or two and it runs like garbage. It’ll die and and be hard to start. It will start back up if I hold the pedal to the floor but will die if I let off the gas. It seems like it’s running rich (I’m guessing) because it smells pretty bad and will blow black smoke. But if I keep my foot in it and get the motor up to temp, it’ll run like a dream. There is no check engine light.

what I have tried-
i have replaced the IAC sensor and IAT sensor. I have done my best to check for vacuum leaks but, I’m having a hard time checking the China walls.

i am pretty new to this stuff I need whatever help I can get.

 

The two wire temp sensor is for the PCM. In the radiator hose, after the thermostat, it is not getting accurate readings of engine temp, so, yeah, not gonna run real well. IAT is probably fine.

What is the flow rate of your new injectors, and at what pressure were they rated?

 

i suppose that would make sense why when it gets to temp that it’d come out of it. I tried to do as much reading as I could before putting the m1 on and I read that of the truck has a/c rust sensor needs to be moved to the upper rad hose.

I’m not sure. But this is the description from where I got the injectors.

Description

These upgrade injectors offer the proper plug for your factory harness as well as proper flow rate for all Dodge 1992 - 1993 5.2L gasoline engines. Set of 8 upgrade rebuilt Bosch 4 hole fuel injectors. Our upgrade injectors are specifically chosen by us to provide you with the best atomization available vs. your stock injectors. This will in turn allow your vehicle to burn fuel more efficiently. Improvements will be seen in fuel consumption, low-end torque and smoothness. Injectors are cleaned and tested to perform as they would new.

100% Plug and Play installation. No modifications, tuning, or splicing required! EV6 fuel injectors that plug right into the factory EV1 harness. For simplified installation these do not use fuel rail clips. You simply insert the injector into the fuel rail, place the fuel rail onto your intake, and bolt back down. That's it! Get the best injector technology without any custom work!

 

Hhhhmmmm.... Not sure on the injectors yet, though, according to theory... they *should* work just fine.

Address the temp sensor first, see if that doesn't resolve the problems. I would be tempted to put the sensor for the PCM in the manifold, and the one-wire sensor where you currently have the two-wire sensor. Either that, or drill/tap the manifold for the second sensor. I think the boss that it goes into is there in any event. Just... no hole.

 

thanks for the help!! I took the two wire coolant temp sensor and put it in the manifold (there’s a spot for both of them) and sure enough it runs great.

 

Awesome. Gotta love the easy fixes.