OBD1 to OBD2 plus upgrade?

[haybag]

So I successfully put a obd1 5.9 magnum into my 69 Dart 4spd and have been driving it all spring and summer and love it, but now I want more. I originally went OBD1 because that was the donor I had,wasn't confident I could even make it run and read it was easier. I bought a complete 98 ram 1500 with a 5.9 as a donor. I know the pcm and plug ins are different, but l think all the wiring and sensors are the same other than a 2nd o2 sensor. Is it just a matter of depinning my wiring and putting on the 3 plugs for the pcm? Also while I am changing the computer I want to change the cam using the Hughes upgrade cam kit and I am going to do the kegger mod. Are these mods going to require a reflash of the pcm? This will be my first time doing any upgrades with a computer controlled system so just looking for some guidance. Thanks

 

[jbc426]

So I successfully put a obd1 5.9 magnum into my 69 Dart 4spd and have been driving it all spring and summer and love it, but now I want more. I originally went OBD1 because that was the donor I had,wasn't confident I could even make it run and read it was easier. I bought a complete 98 ram 1500 with a 5.9 as a donor. I know the pcm and plug ins are different, but l think all the wiring and sensors are the same other than a 2nd o2 sensor. Is it just a matter of depinning my wiring and putting on the 3 plugs for the pcm? Also while I am changing the computer I want to change the cam using the Hughes upgrade cam kit and I am going to do the kegger mod. Are these mods going to require a reflash of the pcm? This will be my first time doing any upgrades with a computer controlled system so just looking for some guidance. Thanks

The Kegger Mod works great for low to mid-range RPM. With a bigger cam than stock, you can get away with the stock tune to a point, but you are leaving a significant amount of performance on the table.

I used a Hughes cam with the slightly stiffer springs, Kegger Mod and headers. The motor loved the mod's, especially when reflashed.

 

[toolmanmike]

So I successfully put a obd1 5.9 magnum into my 69 Dart 4spd and have been driving it all spring and summer and love it, but now I want more. I originally went OBD1 because that was the donor I had,wasn't confident I could even make it run and read it was easier. I bought a complete 98 ram 1500 with a 5.9 as a donor. I know the pcm and plug ins are different, but l think all the wiring and sensors are the same other than a 2nd o2 sensor. Is it just a matter of depinning my wiring and putting on the 3 plugs for the pcm? Also while I am changing the computer I want to change the cam using the Hughes upgrade cam kit and I am going to do the kegger mod. Are these mods going to require a reflash of the pcm? This will be my first time doing any upgrades with a computer controlled system so just looking for some guidance. Thanks

Subscribed. I grew up in the dealership through the OBD1 through the OBD2 days to port injection. I don't think it should be attempted. Not that it couldn't be done just I think you're setting yourself up for failure.

 

[Mike69cuda]

I was going to do the same thing on son’s engine swapped fiero. He sold the car before I did it. I did a lot of research on it. It didn’t look too bad since all of the sensors but one were the same, but that was a GM system. If you have some electrical skills & have a basic understanding of how the engine electrical system works, you can probably do it. I would swap the whole harness. Might be a lot of work for what you get, but if you have time on your hands and like to tinker, go for it.

 

[haybag]

If it makes more sense to use the harness from the 98 truck and thin it down the same way I did the 95 harness, I will do that. Just didn't know if that was my best route. To reflash the pcm do you send it out or get a hand held tuner and purchase a tune for your specs ? Never done it.

 

[dragbaron]

Just to let you know, pretty much all the plugs changed on the sensors from OBD1 to OBD2, so if that '98 you bought has a complete motor, then you'll have everything you need.