Carburetors Carb discussion and questions. Upgrading your Third Gen's carburetor, swapping TBI to carburetor, or TPI to carburetor? Need LG4 or H.O. info? Post it here.

ecm controled carb?

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Old Sep 30, 2012 | 10:45 PM
  #1  
Bobby Suth's Avatar
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From: tn.
Car: 1990 firebird,1989 Iroc z,1986 fire
Engine: 3.1lt,5.7tpi,3.1mpfi
Transmission: auto,auto
Axle/Gears: 273?277
ecm controled carb?

FLOORED ME! I thought carbed cars were suposed to be ecm free.ARE THERE any stock 3rd gen cars with no ecm?How can I get my cars to have ecm free carbs?
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Old Oct 1, 2012 | 12:17 AM
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383 Power's Avatar
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From: Shreveport, LA
Car: 1982 SC/1984 Z28
Engine: 305 4BBL/305 4BBL H.O.
Transmission: 700R4/700R4
Axle/Gears: 4th Gen 3.23 Posi/3.73 10 Bolt
Re: ecm controled carb?

As hard as it is to believe, the answer to your question is no. All 3rd gens came with ECMs whether they were carbed or injected. My 1982 SC (First year of 3rd Gen) was practially a base model and it was ECM controlled.

The good new is that you can defeat it pretty easily. You must know that it's against the law to defeat it. Most states really don't care though. Liberal states like California will likely inspect it and require you to leave it intact for registration. I live in Louisiana. My '82 is ECM free. I took it out. The swap will require an aftermarket Carb, Vacuum advance distributer and some way to control TCC lockup on auto cars. It's really very easy to do.
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Old Oct 1, 2012 | 09:58 PM
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Bobby Suth's Avatar
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Joined: Mar 2010
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From: tn.
Car: 1990 firebird,1989 Iroc z,1986 fire
Engine: 3.1lt,5.7tpi,3.1mpfi
Transmission: auto,auto
Axle/Gears: 273?277
Re: ecm controled carb?

thanks
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Old Oct 1, 2012 | 11:26 PM
  #4  
8t2 z-chev's Avatar
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From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: ecm controled carb?

all thirds for sale in the US had ECMs,but some early thirds meant for sale in canada or overseas did not have ECM controlled engines-mentions this in the owners manual of my '82.As mentioned above,super easy to swap to non-ECM controlled carb and distributor-The "CCC"ECM controlled carb has some benefits,but modifications/performance tuning easier with non-CCC version.
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