'95 MAS on a '91?

[fatboy0186]

Will a '95 4.0 MAS fit on a '91? If so will it work properly?

 

[410Fortune]

it might!!!

It actually should but you really dont know for sure till you try....

they both sue the same 19# injectors and similar computers, so it should work.

Why?

Isnt the 95 MAS the one thats all jacked up inside a plastic housing??? YUK!!!!

 

[Rhett]

It should bolt on, but how well it would actually *work* is another matter. Keep in mind that at some point on the OHV engine, the head design was changed; so if the 95 heads are different than the 91 heads, it might affect the way the PCM was programmed; which could lead to problems if the MAF is calibrated for a 95 engine. I do know a 91 Explorer OHV was rated at 155 hp vs 160 hp on a 95 Explorer so that alone may indicate some sort of tuning difference in the computer.

Also remember that in 95 the intake tube is in a different place than on a 91 Explorer. This might (I don't know) lead to a different size intake tube, which could cause problems with bolting on the MAF tube.

You can try it, it just might work. Maybe someone else can enlighten further.

 

[410Fortune]

it is my uinderstanding that the signal from the MAS is the same based on the size ofthe injectors and thats it........so any 19# injector MAS should work as long as it plugs in.......however I have never tried, so......

 

[Jason_25]

It should work. It might not plug in, so you will probably need to rig up the wiring some.

 

[fatboy0186]

I am asking because the '91 MAS is smaller than the '95, and I can pick up a '95 for $5. So I figured instead of spending $225 on a Pro-M, I could get improved performance for $5, but I don;t want to mess up my motor...

 

[Jason_25]

You won't mess up the engine at all. Just make sure that if the connector doesn't fit, to make the wiring correct and secure.

 

[Rhett]

$5!! wow man I would buy it for that just to try it out!
If it doesn't work right then you're still only out $5