Amount of Boost does NOT kill Map Sensors
 

So please stop posting that anything over 22-23psi will kill them, it's just not true. I, and a couple other people now, have run 30psi thru the OEM sensors and they hold up just fine. The only difference is they don't read accurately passed the 22-23psi.

The reason people are blowing Map sensors is from Oil Blowby. Ive seen plenty of these come now and everytime that has been the issue. If you keep blowing them, install a catch can and it will go away. Even people with GMS1 sensors have had this issue lately.

If you are someone that keeps blowing them, next time remove it and look inside the sensor, you will see some oily residue inside there. This seems to eat the inside of the sensor and cause it to fail. You can also remove them occasionally and clean them with either MAF sensor cleaner spray OR Electronic parts cleaner spray.

Thanks :)

^This.

I am one who has gone through 3 already and I can tell you it's exactly that. After looking around and asking questions, I inspected all my blown sensors carefully and they all had oil residue on them and were unsalvageable. Plain old dead.

I am going the catch can route.

Lol +1. 24psi here Map sensors still good.

24 psi and MAP sensors going strong.

yeah ive been seeing alot of people saying they will get ruined lately.

will a catch can help a lsj in anyway? Any issues in the lsj with blowby?

Ive played around with 27-30psi for quite some time now...41k on stock map sensor *knocks on wood*

People probably read some mis-information back in the day when there was a new "blown MAP sensor" thread every day and now just spout it off like it's the truth. That seems to happen a lot on here. Kind of like "Learn Down" :lol: But I won't dive into that.

Good post BYT! Hopefully the people that still believe that will see this thread and correct themselves in the future :nono:

Yea I lost 3 or 4 MAP sensors then installed an MPX catch can and haven't had one die since.

^BAM! /thread on that note. sticky and close it lol.

I agree witht his completely. My "kill" tune is 27-30psi and I've been on 24-26psi for 30,000 miles. Not 1 sensor failure. I know someone here in STL with a Homo Hot Rod that is on #4 of sensors (but he's a tard).

In a sense, it does kill MAP sensors. The higher the boost, the more blowby you're likely to get.

oh common lol

That's not necessarily true..

I blew mine out and sure enough there was oil on it. Gotta find me a cheap can to throw in

Oh "common", what? You're shoving more air into the cylinder. Rings aren't a perfect seal. Guess what happens?

again. Anyone?

If Ure maf is in the charge piping then of course. For the map yes because its still in the intake or charge pipes. So therefore can get the Blowby. ...

I'm gonna have to go find the thread where I already stated this theory on oil messing up the MAP sensors so I can get credit for it.

Ive been saying this for a long time now also, this thread was long overdue. But good find for you as well, def seems to be the cause of all of this :)

My old one
https://www.cobaltss.net/gallery/fil...blowby_002.jpg
https://www.cobaltss.net/gallery/fil...blowby_001.jpg

i guess the question is what do you have?

most of the lsj peeps that i know that have em are on a small pulley tvs, so creating close to the same levels of boost as these fellas.

That's me. TVS, 2.8, 80's, full exhaust inc header, cooling mods, Trifecta tune, 312whp

Map Sensor Fix
 

Have 2008 SS/TC. Put GM stage kit in car ran fine. Started getting boost problem, shut car off restart boost back. Tried many fixes none worked, would not boost over 10 psi when throttlr full open. Took out map sensor on manifold, cleaned with electronic parts spray and lightly blowed dried with air,reinstalled car running fine. Tried every fix that I saw on this site this one worked. Hard for me to believe , see how it goes.

I don't know if i would so much call this a "fix" but maybe more of an insurance for longevity of the sensors. This definitely should be done every oil change as a part of preventative maintenance schedule on a tuned car (yes even the 3bar maps should be maintained in this matter). I've personally been doing this as part of my normal servicing and have yet to have any issues what-so-ever with any of my stock MAP sensors.