Thread: Why is my MAP sensor causing my car not to start?

The car did start if I capped off the MAP sensor and TB line. So IDK what that means. I also happened to find that there was a slight crack in the rubber vac line piece directly off the TB. Can a vac leak cause a car not to start?

Originally Posted by 1998gpgt

Could it be that the PCM adusted itself to the L67 MAP, and the L36 MAP is throwing things off ?

No, it didn't just "adjust itself".

Originally Posted by VinnieGTP

The MAP needs to come off the port under the snout on th LIM.

Not if his PCM is still basically for an L36. It would throw off its readings, especially since that MAP isn't designed to see boost.

Originally Posted by 1998gpgt

Can a vac leak cause a car not to start?

Ask anyone who ever accidentally left that piece off when working on their car. It doesn't start.

You can't trouble shoot your car properly with other known issues. Fix the leak and we can go from there.