OBDI to OBDII

[LQ1VDUB]

Does anyone know where I can find a definitive guide to converting a 93 LQ1 OBDI to OBDII ? I have access to a rather extensive amount of 95-97 LQ1 engine parts and if not I can find them. Since it is no longer in a Lumina and now frankensteined into a 1970 VW Squareback I have a good amount of extra hood space, so power adder suggestions and custom fab suggestions are welcome as well.

[RedZMonte]

Easiest way is to snag a '96 or '97 engine harness and ECU. after that use a pin schematic for both the OBDI and OBDII and make changes... I did the swap a few years ago there was a pin out of what needs to change on the C100 (firewall connector), prob. still there. There are a few of us turbo guys as well. look in the boost section and you will see how it was done. Myself, TimG, Ferrarifan, and a few others all have DOHC turbo setups.

http://60degreev6.com/forum/showthread.php/36113-OBDII-Swap?highlight=OBDII+swap

http://60degreev6.com/forum/showthread.php/36113-OBDII-Swap?highlight=OBDII+swap

here is the posts from my swap.

Hope this helps,
S

[d.o.h.c]

Its a very time consuming swap. But once your done its a totally different ball game with tuning.

Mark

[Fierobuffoon]

Quite worth it from the looks too.. and ya can use a better trans too

[FerrariFan]

ODB II engines have a cam position sensor so you will have to swap a cam carrier that has the sensor provisions. Also, ODB II is MAF not MAP and sequential fuel injection so there are some wiring differences there too. I know this because I went the other way on my turbo build. I took a 97 ODBII and coverted it to 90 ODBI so I could run the $8f code mask.

[RedZMonte]

ODB II engines have a cam position sensor so you will have to swap a cam carrier that has the sensor provisions.

This is true, if forgot to note that in my post. 1994+ have the Cam position sensor so it didnt cross my mind. a 1994-5 Cam tower will be a direct swap, if you go this route then you will IIRC also need to run the newer cams as well (have some sort of minor diff. that work with the newer cam towers) can someone correct or confirm this for me?

I don't know if there is a way around the cam pos. sensor anyone?

S

[Dave96z34]

ODB II engines have a cam position sensor so you will have to swap a cam carrier that has the sensor provisions. Also, ODB II is MAF not MAP and sequential fuel injection so there are some wiring differences there too. I know this because I went the other way on my turbo build. I took a 97 ODBII and coverted it to 90 ODBI so I could run the $8f code mask.

You just made it harder on your self by doing that. Hp and dhp are cheap and easy.

[FerrariFan]

You just made it harder on your self by doing that. Hp and dhp are cheap and easy.

Probably right about that but there didn't seem to be a lot of other options 3 years ago when I went down the turbo path. I'd like to learn more about Hp and DHP.

[Smittro]

ODB II engines have a cam position sensor so you will have to swap a cam carrier that has the sensor provisions. Also, ODB II is MAF not MAP and sequential fuel injection so there are some wiring differences there too. I know this because I went the other way on my turbo build. I took a 97 ODBII and coverted it to 90 ODBI so I could run the $8f code mask.

ObdII cars use both MAF and SD map based readings (along with other sensors) to create fuel tables....

To the op time for a stand alone or a piggy back.. Imho