Tuning Hardware

[Micheal Nadeau]

In the OBD II world, we have J2534 box that allows for inter communication between an PCM and a laptop. I can change settings and flash the PCM in as little as 10 minutes.What do you need for an OBD I system? I'm not to clear on what I actually need. I want to be able to remove the EGR provision and lean the car out some. Not looking for anything crazy. Doesn't need to be on the fly adjustable or anything like that. I want to be able to make what ever adjustments I need, and forget about it. I have been on Moates site and have seen several different things on there, again not looking for anything over the top. Also not looking for something I am going to have to take to some one else. I want to take care of it myself.

 

[Noobz347]

You may be opening a can of unforeseen circumstances.

The answer to your question first:

The MOATs is an option, so are the TwEECer and TwEECer RT. These require 3rd party software to really make effective and it's still a pain in the ass.

More money but simpler to use would be the Anderson PMS.

All of these systems can be used to completely tune the car but if that is your eventual intention, you'll need more equipment than just the tuner. If all you're looking to do is adjust some sensors etc, then I'd probably opt for thee cheapest option (TwEECer) and use it for that. To be clear on one point... you can NOT flash an OBD1 computer. Whatever you end up with will need to be premanently installed. You can't flash and remove like you can with OBD2.

 

[Micheal Nadeau]

So I will be flashing and installing a chip to overide the PCM?

 

[Noobz347]

So I will be flashing and installing a chip to overide the PCM?

There are stand-alone systems but I don't think that's what you want.

What the chips give you the options to do are:

1. Make +/- changes to existing tables to include turning sensors and solenoids on/off (this includes varying the air meter tables).
2. Tell the adaptive controls of the EEC to 'stand-down' and run a replacement set of tables.
3. Store 1 or more tunes that be switched between and/or resume normal EEC control (OFF mode).

One of the fundamental differences between OBD1 and modern OBD2 is that the OBD1 tunes are hardwired from the factory. Their programs are in Programmable Only Memory and once the chip is removed, the EEC is once again normal. OBD2 has flash memory to hold the tune. That tune can be rewritten.