Is it possible to convert a ODB1 to ODB2

[crusada]

I have always wondered this about dsms never thought to ask. I know it can be done with hondas providing you have the right ECU. Is it possible to convert a 91talon TSI from ODB1 to ODB2.

Thanks

 

[96 420a-t]

Not at all. Why even try?

 

[nickk90]

im sure you could swap a evo8 ecu some how

 

[clipto]

Honda's are another story when coming to switching to obd2.But you won't need to as if you look into dsmlink it will work as a logger, engine check code reader and tuner.So the switch to obd2 would be pointless plus there is really no reason to do it.

 

[BurrowZ]

Anything is "possible."

Practical? Worth the time and money? Absolutely not.

 

[crusada]

Not at all. Why even try?

It was more out of curiosity then anything honestly. I figured it was ECU related and I dunno if an evo 8 ecu swap would do it or not. Regardless its not worth the cost.

 

[Ghost_92TSi]

Not at all. Why even try?

Possibly an Emissions thing? I have hooks ups that pass my stuff even if its not in perfect order.

 

[mike96]

I have always wondered this about dsms never thought to ask. I know it can be done with hondas providing you have the right ECU. Is it possible to convert a 91talon TSI from ODB1 to ODB2.

Thanks

Absolutely possible!
http://www.dsmtuners.com/forums/electrical-tech/419970-90vs91-wiring-evo8-ecu-swap.html
http://www.dsmtuners.com/forums/newbie-forum/357167-evo8-ecu-now-1g-dsm-whos-doing.html
Evo8 ECU in a 1G DSM in the works! - evolutionm.net

Not at all. Why even try?

The ability to flash the ECU without the cost associated with ECMLink... That’s why I would do it.

Anything is "possible."

Practical? Worth the time and money? Absolutely not.

Actually I bet you will find it is a lot easier and cheaper than you think. EVO8 ecus can be had for around $100-$150 range (the price went up after the EVO guys started finding out that us 2G guys were installing them in our cars), the flash cable is about $75, and the cost of a jumper harness could be as little as $35 if you get ECU plugs for a 2G from the junkyard.

 

[bryanwheat]

You can pick up a used eprom ecu and dsmlink v2 for 300 or less. It would be a lot easier than redoing the harness.

 

[synthetek]

Possibly an Emissions thing? I have hooks ups that pass my stuff even if its not in perfect order.

Its easier to pass emissions with obd1 you don't have to deal with all the readiness monitors and stuff.

 

[Bud92gsx]

Emisions, what the hell is that

 

[DSM1G90]

..agree, 'cept here in two counties in Idaho, no emissions testing either. But live in one of those two counties where I had to get sniffed - failed the first one, but after securing vacuum leaks, timing and oil change..I passed.

 

[Ghost_92TSi]

Its easier to pass emissions with obd1 you don't have to deal with all the readiness monitors and stuff.

Those nazis always hook my car up to the Sniffer. Can't just slap on a de-fouler like OBD2.

Although I did toss out my EGR and charcoal canister without having to have something like DSMlink to erase a code.

Only problem I have with my OBD1 is I have nothing to log data.

 

[Talon IV]

I am converting my 91 TSi to OBDII via an Evo VIII ECU.(Plus I prefer the tuning capabilities of the Evo's ECU) And if you have any sort of 1g ECU from a 4g63 you can essentially make the Evo VIII ECU plug and play. Yeah it can be done with the right research and know how.

 

[Colt4G63 also]

One benefit I can think of right off the top of my head, would be all the extra inputs and outputs. The only available wire I have for logging is my EGR temp input, and the only outputs available to do my bidding, are the FPR solenoid, and the BCS solenoid.

 

[ramsack]

Yes, it is possible, you'd have to basically make a new harness. Why would you want to do this? There is no performance gain from it. OBD is all about diagnostics, not the actual function of reading a sensor's analog signal, converting it to a digital number, calculate stuff with a CPU and some tables, and convert back to analog to power electromechanical devices. If you want flexibility with endless amounts of I/O ports, you should look into an EMS. MegaSquirt would really be the way to go, depending on your learning curve.

 

[fun kart kid]

Has anyone swaped a 2g flashable ecu into a 1g.

 

[ed1380]

Yes, it is possible, you'd have to basically make a new harness. Why would you want to do this? There is no performance gain from it. OBD is all about diagnostics, not the actual function of reading a sensor's analog signal, converting it to a digital number, calculate stuff with a CPU and some tables, and convert back to analog to power electromechanical devices. If you want flexibility with endless amounts of I/O ports, you should look into an EMS. MegaSquirt would really be the way to go, depending on your learning curve.

Not true at all. Read the links above. You just need a harness adapter for the 2g or evo ecu to plug in and change a couple sensors

The 1g's have the same power transistor and coil. Same isc. Same cas. You'll need to change the tps, knock sensor, and thermostat sensors. Also a perfect chance to upgrade to a evo maf or gm maf.

As for emissions, you'll still be put on the sniffer.

 

[ramsack]

So where are the wires for the second O₂ sensor, and other sensors, going to come from in the car's harness? Oh wait, yeah, you'll have to run wires like a ghetto mess. If you actually care how things look and function, you have to spend the effort to integrate new wires into the harness, so if you are doing that in the first place, why not wire it for something superior like an EMS?

 

[ed1380]

Why on earth would you need the second o2 if you have no catalytic converter!! You bike riding tree hugger You wire in your wideband right into the ecu so you can log it.

Even if you keep the rear o2, it is still wired into the old ecu plug. All you do is solder the new ecu's pigtail into your old harness, so all the wiring stays the same. The only "ghetto" thing is rewiring the tps sensor. The 1g's have 3 wires going to the tps and 1 wire to an idle switch on the tb. The 2g tps has the idle switch integrated so that's why it has 4 wires.

 

[ramsack]

The MAP sensor is one right off the top of my head. This is an awful lot of retarded effort to keep a stock-based ECU. Sure, you can disable that crap, but only on flashable ECUs. What the advantage in getting an adapter and screwing with other shit just to run a 2G or Evo. ECU, when you can get the same results from DSMLink with no effort, is beyond me. BTW, I ride a bike because I don't have a license and cars are generally too expensive to maintain. I'd rather put my limited money into other areas of my life than cars...especially when you can't even use power on the street.

 

[ed1380]

The only reason to convert a 1g to obdII is to use an evo or 2g ecu, and the big reason is $$$. It's a big effort to earn the extra $300 to run ecmlink. A flashable ecu with tactrix cable and pigtails costs alot less. I paid $25 for a flashable ecu with pigtails last week. and my tactrix cable cost $120. Even at normal price (125 ecu, 200 tactrix, 75 sensors) it's still cheaper, and all you need a couple hours of soldering.

Oh and the mdp sensor is only needed if you're keeping the egr.

 

[Colt4G63 also]

The only reason to convert a 1g to obdII is to use an evo or 2g ecu, and the big reason is $$$. It's a big effort to earn the extra $300 to run ecmlink. A flashable ecu with tactrix cable and pigtails costs alot less. I paid $25 for a flashable ecu with pigtails last week. and my tactrix cable cost $120. Even at normal price (125 ecu, 200 tactrix, 75 sensors) it's still cheaper, and all you need a couple hours of soldering.

Oh and the mdp sensor is only needed if you're keeping the egr.

^^ Exactly! ^^ AEM is expensive! A 2g ECU may be free or really cheap, but nobody's giving away aftermarket engine management systems.

It would be a lot of work to pull a 1g-2g ECU swap off cleanly, but it's not that much more than what I had to do with my car. (started life with a 1.5L)
It's not worth it for me now since my car is already done, but there has been more than one time that I wished I had MDP and rear O2 to log with in link, instead of just EGR temp (currently logging wideband).

In my state we don't get bothered with sniffers, and being pre-96, they wouldn't even think about trying to plug in anyways.

 

[ramsack]

Still such wasted effort to keep something factory, compared to an EMS.

 

[Colt4G63 also]

Still such wasted effort to keep something factory, compared to an EMS.

Well that's where your "limited money into other areas" comes in. If you're building a car from scratch (like a 4g63T dune buggy to name one of a few), and you have OEM parts at your disposal, then it's more worth it for that one extra input, or tuning option.