Got a problem...

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#1
I need to figure out if my engine is a OBDI or OBDII. The engine in there is not the stock engine. The guy i bought it from replaced the origional engine with a 96 engine. I have all the reciepts for it but none of them say what year the engine is. Is there anyway i can figure this out just by looking at it?
 
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#2
A quick check is to look for the OBDI connector under the hood. The OBDI connector is a round connector covered by a screw on cap. It almost looks like a power steering or brake fluid reservoir cap.

I could be wrong, but if I remember correctly the OBDII specification REQUIRES that the connector is within 5 feet(?) of the steering wheel and on the INTERIOR of the car, not under the hood. I think most (maybe not all) OBDII connectors are rectangular with 12 or so pins.
 
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#4
neither one of you are right not to sound like a dick but. up until i think 2000 model year all vehicle had the round 20 pin connector undr the hood. that does not mean it is obd1. if it is a 96 model year or newer you should have a connector under your dash with 16 pins and kind of a trapazoid shape. if the previous owner had put an obd 1 engine in the vehicle that is equiped with obd2 you would have all kinds of lights and i don't think it is acctually possible. so you could have the round 20 pin connector under the hood and still have on board diagnostics 2.
 
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#5
nathan56989 said:
neither one of you are right not to sound like a dick but. up until i think 2000 model year all vehicle had the round 20 pin connector undr the hood. that does not mean it is obd1. if it is a 96 model year or newer you should have a connector under your dash with 16 pins and kind of a trapazoid shape. if the previous owner had put an obd 1 engine in the vehicle that is equiped with obd2 you would have all kinds of lights and i don't think it is acctually possible. so you could have the round 20 pin connector under the hood and still have on board diagnostics 2.
Actually, all you did was repeat & confirm what I said - the presence of the 16 pin connector indicates OBDII.

Specifically, the 16 pin DLC (connector) for OBDII is covered by a spec - SAEJ1962. I was wrong about the location, it must be SIXTEEN inches from the steering wheel, not 5 feet as I previously indicated.

My information comes from a book that I bought a few years ago, "The OBDII Bible" by Peter David.
 

Big Daddy

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#6
Pretty hard not to be more than sixteen inches from the steering wheel and be under the hood! I too checked with emission controls and NTHSB and they all said OBDII is in the interior of the car. If the owner modifies that than that is a different story.
 


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