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'93 motor in an '88

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by newyorkin, Jan 9, 2002.

  1. newyorkin

    newyorkin 1 ton status

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    \'93 motor in an \'88

    Hey all:

    I'm looking at a '93 350 right now that I think is TBI, to replace my '88 350 TBI.

    So I'm wondering: how much will need to change electronically? Is the '88 computer and harness compatible with the '93 computer and harness?

    Ratch
    <a target="_blank" href=http://k5.8m.com>k5.8m.com</a>
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  2. 95 Silverado

    95 Silverado 1/2 ton status

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    Re: \'93 motor in an \'88

    is there a problem with the '88 TBI set-up? if not I would leave it intact and use the wiring and sensors from that engine on the '93 engine. you may run into problems trying to mix the parts from the different years. If the throttle body unit looks the same and has the same connectors, you could probably use the newer unit.

    '95 Chevy Silverado 1500
    5.7 V8-NV4500- 3.73 rears
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  3. newyorkin

    newyorkin 1 ton status

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    Re: \'93 motor in an \'88

    My TBI casting throttle bore is worn out, so that can't be reused without major overhaul. I picked up a replacement bore, but the plates are a hair rusty so I've been avoiding playing with it. I dunno if the '93's is the same or not, that's pretty much what I'm wondering. I'm told the new motor is a low miles diamond, so I'd rather use as much off it as possible if I get it, and not change the intake or break the existing gaskets seal (I'm looking forward to the new brackets and room for the second alt and OBA compressor!!). The rest of the sensors I guess I can swap over pretty easy... But I wanna know if the TBI's were direct interchange between those years...



    Ratch
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  4. BowtieBlazer

    BowtieBlazer 1/2 ton status

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    Re: \'93 motor in an \'88

    I know the computers are different if its anything like a suburban....A buddy of mine has an 88 suburban and my uncle had a 90 that he had sold. He had a chip in the 90 that he removed before selling and I offered it to my buddy with the 88 but when we checked his computer it was different. If I remember right the TBI got alot more complicated and the computer controlled more and more after 91

    Granny LOW and let her GO!!
    1985 GMC C-10 Shortbed
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  5. CaptCrunch

    CaptCrunch 1/2 ton status

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    Re: \'93 motor in an \'88

    I agree... use the stock 88 setup and sensors and you will be fine. You should be able to swap TBI's without a problem also. Overall the systems are nearly identical. I do believe they take different ecm numbers but would have to check. But if you just swap th motor and the TBI unit you should be fine. Just keep your 88 ecm, wiring, snsors, and dist.

    -Mikey
    1987 Chevy K5 Blazer- 350 TBI
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  6. Chris Demartini

    Chris Demartini 1/2 ton status

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    Re: \'93 motor in an \'88

    <font color=blue>I think the computers changed some in 93 when they went to electronic transmisions. Use the 93 motor and throtle body with your harness and computer. The throttle body itself should be the same
     

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