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#1
03-12-2005, 03:36 PM
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ecm?
i was wondering if my ecm is a early OBD2 or later OBD2. it says that its OBD1 complient but its not OBD1. it has the computer under the hood. now if somebody can tell me how you read the numbers on it to tell what version it is. the truck was made in 6/95. is it really a 95 or a 96?
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed. 
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#4
03-13-2005, 07:33 AM
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Re: ecm?
i'm looking into having it reflashed. have you had a problems with yours? blazerlt
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed.
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#5
03-13-2005, 08:00 AM
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Re: Re: ecm?
Quote:
I just recently did a small article on this. If you've never had it reflashed, you are probably 11 or 12 flashes behind... Some things won't really matter to your truck if you are not having specific issues, other parts of the flash will help increase your miledge a little bit as well as do some preventative things.. Get the latest set of flashes and the previous ones will be culmative.
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  95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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#6
03-13-2005, 11:59 AM
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Re: ecm?
i know its had the EGR done in 98 but other than that i don't know. i read your post on it. you said you can have it reflashed to be 100% OBD2. is that right or will it be the same of early version of OBD2 or can you play with it like you can on the newer OBD2s? such as changing the timing?
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed.
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#7
03-13-2005, 01:23 PM
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Re: Re: ecm?
Quote:
I would get it updated to the latest software version, but don't expect much. My mileage actually went down after it was flashed on mine.
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1995 Factory Blazer Service Manual for sale, PM if interested.
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#8
03-13-2005, 05:37 PM
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Re: ecm?
how much did you MPG go down? does the trans shift different?
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95 jimmy. Vortec V6. 4.3 liter CPI. ,2.5" catco cat, 2.5" cat back with flowmaster muffler split rear., 40 street series, 2 12" audiobahns in custom box,K&N CPI intake system. 71 Mustang coupe- project car. stock 302 with Cobra intake, holley 650dp, afco racing radiator, headman headers, msd distributor, 2.5" from the headers.C4 tranny with shift kit, Mach 1 body lay out. 90 cav, 2.2 tbi, gas getter. 99 chevy s10 zr2, 6" lift, duel exhaust. 5 speed.
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#9
03-13-2005, 06:28 PM
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Re: ecm?
Actually on mine, the shift improved somewhat (even over my existing transmission mods) and my mpg actually went up about 2mpg...I listed fixes in the other article I did
__________________
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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#10
03-13-2005, 08:18 PM
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Re: Re: ecm?
Quote:
The transmission shifting liek usually. Remember, the transmission will always shift tight for a while after you have reset the computer. It then relearns and softens up a bit.
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1995 Factory Blazer Service Manual for sale, PM if interested.
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