OBD1 to OBD2 conversion

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Nov 22, 2007 | 12:55 PM

Hybrid86Z

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From: HEB, TX

OBD1 to OBD2 conversion

whats all needed to do this? new computer and sensors? would i need to re-do the entire engine sensor wiring too?

I don't have crap for GOOD OBD1 tuners in my area, all have gotten into the LS1 tuning w/ the OBD2 stuff, I'd like to be able to use them to tune the car.

Any help is appriciated.

-Ben

Nov 22, 2007 | 01:00 PM

ckyconan2003

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From: Bryant, AR

OBD1 PCM and 93-95 knocksensor

Nov 22, 2007 | 01:05 PM

Hybrid86Z

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From: HEB, TX

Quote:

Originally Posted by ckyconan2003

OBD1 PCM and 93-95 knocksensor

i'm converting FROM an OBD1 setup TO an OBD2

so just an tuned OBD2 computer and an OBD2 knock sensor is all i need? thats what i'm hearing.

Nov 22, 2007 | 07:06 PM

96lt1m6

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From: LA$ VEGA$

you are correct.
OBDII pcm tuned for your conversion, a knock sensor.

Nov 30, 2007 | 07:23 PM

YORK_MUSTAINE

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From: FAIRFIELD, CA

Quote:

Originally Posted by 96lt1m6

you are correct.
OBDII pcm tuned for your conversion, a knock sensor.

so just the knock sensor and a obd2 pcm?

Nov 30, 2007 | 07:33 PM

Hybrid86Z

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From: HEB, TX

thats what he said

I'll let you know how it goes if i decide to give it a try.

Nov 30, 2007 | 07:37 PM

96lt1m6

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From: LA$ VEGA$

yes.you do plan on getting a tune aren't you?
you need to have the CPS,rear O2's deleted from the OBDII pcm

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Nov 30, 2007 | 10:39 PM

Transamthunder85

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CPS? Actually this good info, I have the same prob. My buddy has HP tuners and we werent able to do anything with it because mine is a 95 also. So the wiring harness or nothing else needs replaced?

Nov 30, 2007 | 11:05 PM

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96lt1m6

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From: LA$ VEGA$

Quote:

Originally Posted by Paul Bell

Ain't there a crank sensor on the OBDII?

yes,it needs to be deleted from pcm
its mainly for emission

Quote:

Originally Posted by Transamthunder85

CPS? Actually this good info, I have the same prob. My buddy has HP tuners and we werent able to do anything with it because mine is a 95 also. So the wiring harness or nothing else needs replaced?

Crank Position Sensor
nope,no harness mods. you cannot use HP on these cars

Last edited by 96lt1m6; Nov 30, 2007 at 11:16 PM. Reason: my computer shut off (lightning out)

Nov 30, 2007 | 11:09 PM

#11

1bdbrd

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Hp Tuners WILL NOT work with an LT1 pcm. A swap to OBDII won't help you really at all.

Dec 1, 2007 | 12:43 AM

#12

TwoFast4Lv

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From: LT1 land...the "409" of the 90s!

BTW no one has mentioned the other wire you need to run from the Passenger kick panel to the ALDL

Dec 1, 2007 | 07:44 AM

#13

bricez28

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From: long island new york

is there a scanner for obd1 that doesnt need a cigarette lighter? i was trying to scan and we had some fancy scanner that needed a cig lighter.

Dec 1, 2007 | 02:43 PM

#14

1bdbrd

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Quote:

Originally Posted by bricez28

is there a scanner for obd1 that doesnt need a cigarette lighter? i was trying to scan and we had some fancy scanner that needed a cig lighter.

I use freescan on my laptop for my 94. I will be switching to Datamaster though. It still needs a cig. lighter if your laptop battery isn't very good.

Mar 19, 2010 | 12:01 PM

#15

stburgpete

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From: Winter Haven, Florida

Sounds like fun.

Mar 20, 2010 | 06:21 AM

#16

S10Wildside

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As far as I know you can only tune an OBDII LT1 PCM with TunerCat OBDII...which was sold to JET. So unless you can find someone with TunerCat OBDII the other option is to buy JET's software.

I talk with a lot of LT1 guys and finding a tuner who wants to touch an LT1 car is not easy these days.

Mar 20, 2010 | 06:41 AM

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gregrob

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Jet DST and LT1 Edit are your only two options for tuning OBD-II LT1's right now...

Mar 20, 2010 | 06:42 AM

#18

gregrob

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Quote:

Originally Posted by 1bdbrd

I use freescan on my laptop for my 94. I will be switching to Datamaster though. It still needs a cig. lighter if your laptop battery isn't very good.

You need to check out Tunerpro RT V5 Beta. It works with LT1's now and has built in data logging. Much better than free scan, fully customizable. You can actually make it show more data than datamaster. No way am I paying for datamaster now that I have this.