BlazerINtheWork

iTrader: (7)

i bought a LT1 motor to swap into my truck, and was told it was a 95 from an f-body. it does have alum heads but i noticed smothing today. it has alot of the same senors as my 4.3 which uses MAP. i thought 95's were MAF? there anyway to tell the year of the motor by numbers on the block? how do i know if i have map or maf?

infinitebird

iTrader: (11)

maf/map is external to the engine. It can be run on either. Basically whichever it was before is irrelevant for swapping it into another vehicle, if you did not purchase it with all the accessories. If you did, then whether or not a maf sensor was included should answer the question.

Has more to do with the pcm than the engine.

firetird

iTrader: (1)

you should have both. the MAP (Manifold Absolute Pressure) sensor should be plugged into the intake manifold while the MAF (Mass Air Flow) sensor should be before the intake registering how much air is entering the motor. i never knew that lt1's didnt come with a MAP sensor, but i know the 93's didnt have a MAF. They ran on "speed density".

infinitebird

iTrader: (11)

LT1s do have a map sensor.

buffman

iTrader: (9)

Unless someone swapped the intakes on them, I do believe the pre 94 LTX engines didn't have the fuel crossover up front.

BizZzatch350

iTrader: (33)

ding ding ding, thats how you tell a 92-93 from a 94+ the fuel cross over is up front rather than in the back like on the earlier 92-93 intakes

1992-3 Intake



1994+






Good pic here



The silver 92-93 doesnt have the fuel corss over up front, the red one does so its either a powder coated 94+ Lt1 or a lT4

BlazerINtheWork

iTrader: (7)

awesome info guys, by what you say it is a 94+. i didn't know they had both, whew, i've still got alot to learn with these motors.

thanks again everyone, HUGE help, exactly what i needed to know