What is a good 2 bar map sensor to use for an lq4?
Thread Starter
Registered User
Joined: Apr 2026
Posts: 1
Likes: 0
What is a good 2 bar map sensor to use for an lq4? Im gonna upgrade to 9 psi of boost, I looked a bit but I keep seeing people say different or conflicting parts, my truck is an 02 Silverado with the lq4, stock intake manifold.
Teching In
Joined: Aug 2018
Posts: 48
Likes: 25
From: BC Canada, Eh!?
I bought a 3-bar truck MAP for my LQ4 from EFI Source before I learned that my P59 could only do 2-bar. It's been working very fine for me regardless.
For when it doesn't, I have squirreled away this part number: ACDelco 19418810
For when it doesn't, I have squirreled away this part number: ACDelco 19418810
I run a GM 2 bar... I think it was for a cobalt SS... GM 12615136 I think they have gotten expensive though. You can run a 3 bar and just scale it for 2bar if you can setup a test to get voltage for 14-15psi. Like on a holley Term X you can run a custom sensor and program the scale from scratch. Just need the correct voltages for the pressures.
