Ashley P

GM MAF "delete" (disconnect)

7 posts in this topic

So, if a GM MAF is bad and causing surging, and simply disconnecting it makes the truck run fine, what is the benefit of having the MAF functional?  :shrug:

Share this post


Link to post
Share on other sites
12 hours ago, Ashley P said:

So, if a GM MAF is bad and causing surging, and simply disconnecting it makes the truck run fine, what is the benefit of having the MAF functional?  :shrug:

Hard to believe it would run better disconnected. :???:

 

Share this post


Link to post
Share on other sites

Many MAF vehicles will disregard the MAF if it's signal is illogical/missing. It runs using other parameters, I just don't know what that "hurts" other than having a CEL on.  It's difficult to get a good aftermarket MAF, and I don't want to invest the money into a GM MAF.

Share this post


Link to post
Share on other sites
So, if a GM MAF is bad and causing surging, and simply disconnecting it makes the truck run fine, what is the benefit of having the MAF functional?  :shrug:

The ecm (0411’s and up) run maf only above 3,xxx rpm. It is supposedly a better way to calculate the cylinder airmass. I run 2 bar speed density on my truck and have for years. Now on yours if it’s a 0411, p01, p59, etc it will run fine BUT you will be stuck in the low octane spark map.

Cliff notes: get a new maf or loose performance and mpg’s.

Share this post


Link to post
Share on other sites

It's that 2001 5.7 3500 van.  It's always low octane.   I'll try cleaning it.  I'm sure mpg have decreased because with the MAF I had lean surge.

Share this post


Link to post
Share on other sites
It's that 2001 5.7 3500 van.  It's always low octane.   I'll try cleaning it.  I'm sure mpg have decreased because with the MAF I had lean surge.

Low octane is just in reference to the spark map, usually regular spark map minus 4-6 degrees. I forgot but if you have a five wire maf sensor your iat sensor is in that also.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.