Hi everybody!
I think that I would like to do some tuning on my Ram, but have run into the problem of having a '94 (using an OBDI).
So...
Does anyone here have any idea about how to convert it to use an OBDII computer? (in order to use tuners)

I'd appreciate any insight.

 

there is no conversion.

WHat you can do:

1. Put in a transmission (and transfer case if you are 4x4) from a 1996 and up truck.
2. Get an intake from a 1998-2001 truck and put that on your ram (has no provision for EGR and no plenum divider)
3. Find a PCM from 1996 and up on a truck that matches your setup (engine size, 2wd/4wd, auto tranny)
4. Pull the wiring harness from that truck.

Basically you are taking all the guts (engin3, tranny, transfer case, wiring harness) from a truck 1996 and up truck and putting it in your truck.

It would be cheaper just to buy a 1996 and up truck.

 

IMO, might as well go standalone. FAST, DFI, Megasquirt, Haltech, ect.

 

Can't with OBDI. There is only one plug for the PCM on them. he will throw error codes all day long.

 

Plenty of people have done it...

 

How many have done it with an auto tranny

 

Good question? But being OBD1 or OBD2 doesn't really make any difference when piggybacking a standalone. There is a guy running MSII in his 99 R/T auto...

But basically you'll need to insert the correct resistors in the injector plugs to prevent injector codes (which doesn't hurt drivability anyways I'm told). You can tap into the TPS, MAP (unless you're running boost) and temp sensors so the stock PCM still sees them and the standalone can utilize them. For controlling ignition I'm not too well versed in that aspect but it has been done. Just my opinion, but if I do upgrade, I will go standalone rather than the trouble of an OBD2 swap with SCT, ect.

On an mild N/A motor I don't think it's worth it, a stroker yes, but for bolt ons a Mopar PCM should do wonders.

 

Well thanks, I was under the impression that OBDII was basically just OBDI but with more sensors for the pcm to manage, and thought that I might simply be able to feed the OBDII pcm the data from all of the OBDI sensors, and hoped that it would be enough information for the PCM to control the timing and fuel.
Oh well, I've been thinking about the MOPAR performance pcm for a while, but don't like the 91 octane requirement (but also don't know if it is really necessary).

 

Yeah, you need premium, my truck pinged badly with anything over 1/4 throttle when I threw the PCM in before I filled up with premium.

Gotta pay to play, if want to advance the timing and gain power, you've gotta run higher octane.

 

You can also get B&G to reflash your pcm.