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1995 Chevrolet S-10 OBD Port

Tiny
TRAVIS36701
  • MEMBER
  • 1995 CHEVROLET S-10
  • 2.2L
  • 4 CYL
  • 289,000 MILES
Well I'm planning on doing a ecu upgrade but the book say it's a obd1 but it have a obd 2 port with 6 pins what do I need to use so I can do a upgrade? I tried a obd2 scanner but it said no link. I'm planning on ordering OBD1 and OBD 2 laptop software can anyone tell me what interface cable I can use remember it's OBD1 but have a OBD2 port
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Tuesday, May 6th, 2014 AT 5:14 PM

13 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
So are you trying to read codes?If so you you will need a scan tool that will do the in between the obd1 and 2 set up. Some of the actron scan tools does them. Some of the otc scan tools will do them. Let me know what your trying to do.
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Tuesday, May 6th, 2014 AT 8:14 PM
Tiny
TRAVIS36701
  • MEMBER
  • 32 POSTS
I want to update the ecu but not sure if I can use OBD 2 interface
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Wednesday, May 7th, 2014 AT 3:42 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Update how?Performance with aftermarket programming?You have to be more clear as to what your asking.
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Wednesday, May 7th, 2014 AT 6:05 AM
Tiny
TRAVIS36701
  • MEMBER
  • 32 POSTS
Yes I want to upgrade for more performance by increase the fuel delivery and spark cause I've added a turbo to my truck.
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Wednesday, May 7th, 2014 AT 6:41 AM
Tiny
TRAVIS36701
  • MEMBER
  • 32 POSTS
Pretty much I want to upgrade the ecu for more performance but I'm going to use OBD1 & OBD2 laptop software but the connector port in my truck is OBD2 so what interface cable do I need to upgrade my ecu for more performance
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Wednesday, May 7th, 2014 AT 7:14 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Are you sure that computer in your truck doesnt have a removable eprom you can swap?The earlier gm vechiles had them.I did one on my 1992 chevy s-10.
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Wednesday, May 7th, 2014 AT 12:25 PM
Tiny
TRAVIS36701
  • MEMBER
  • 32 POSTS
I'm sure that it has one cause it said 95 S10 have the OBD1 setup and the 96 and up have the OBD2 setup but my truck have the OBD2 port under the dash. That what have me confused. But when I tried the OBD2 scanner on the port just to see if it'll read out it says no link. But it'll read out if I jump wire it.
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Wednesday, May 7th, 2014 AT 12:47 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Your not supposed to be able to flash codes out of those that have the obd2 connector on the 95 and down vechiles. See if there is a little door that comes off your computer held in by a screw were you can swap out the eprom?
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Wednesday, May 7th, 2014 AT 12:53 PM
Tiny
SATURNTECH9
  • MECHANIC
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Looks like you have a removable eprom so you would get a performance eprom to put in your computer.
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Wednesday, May 7th, 2014 AT 12:57 PM
Tiny
TRAVIS36701
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  • 32 POSTS
Yes it have a door with two screws, but I've checked to see if a performance chip would be compatible for a turbo and everyone said no that the ecu itself have to be programmed.
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Wednesday, May 7th, 2014 AT 1:22 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Your best bet is find a speed shop that does ecm mapping with the truck on a dyno.
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Wednesday, May 7th, 2014 AT 8:37 PM
Tiny
TRAVIS36701
  • MEMBER
  • 32 POSTS
I've found out that 94 & 95 gm vehicles have OBD1.5 setup which is basically OBD1 with a 16 pin connector and found a connector for it. But thanks for the help and thought that you would like to know.
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+1
Thursday, May 8th, 2014 AT 5:19 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Thanks I did know that remember I mentioned that in my first post to you about not all the scan tools wont read those?I have worked on those cars and they actually read out obd2 codes on the scan tools. As far as programing the ecm yourself I wouldnt recommend it especially with a turbo. Thats why I mentioned having the ecm maped they put your truck on a dyno under a load like your driving down the street. They program the ecm to match the engine turbo etc you have for optimum performance.
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Thursday, May 8th, 2014 AT 9:02 PM

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