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Blazer programming.

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Blazer programming. - 12/11/2007 11:04:32 AM

jzcan

Posts: 3
Joined: 11/23/2007
Status: offline

Ok gueys so i just bought a 2002 blazer s-10 4 wheel drive. They all come with the 4.3L V6 Vortec excellent engine. My question is this truck is pretty quick and has some balls but i was told there is some type of protection or safetly on the computer system which wont allow the blazer to rev up very high or go very fast is this true?? If so how can i reprogram the computer so it doesnt back off the power???

Thanx.

Post #: 1

RE: Blazer programming. - 12/11/2007 11:28:21 AM

rriddle3

Posts: 1545
Joined: 12/22/2006
From: Fort Worth,Texas
Status: offline

I believe the factory sets the rev limiter at ~6,200rpm and the speed limiter at ~110mph. You can change both of these with a Hypertech programmer and probably others, but you need to be sure of what you're doing by altering these limits. Stop and ask yourself, "Why?'.

< Message edited by rriddle3 -- 12/11/2007 11:30:40 AM >

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2002 Blazer LS 4dr 2WD Auto Trans
Hypertech PP III Programmed
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(in reply to jzcan)

Post #: 2

RE: Blazer programming. - 12/11/2007 11:33:27 AM

swartlkk

Posts: 15276
Joined: 5/1/2005
From: Waterloo, NY
Status: offline

If you are referring to torque management, the 4.3L does not have any torque management being done by the PCM. If you are referring to the rev limiter and speed limiter, they are both there for a reason. Typically, the speed limiter is set at 98mph due to the speed rating of the tires that came stock on these trucks. You will gain pretty much nothing by increasing the rev limiter without modifying the engine internally to shift the power band higher up in the RPM range.

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