MAF question...
08-19-2004, 02:39 PM
#1
TECH Fanatic
Thread Starter
Join Date: Sep 2003
Location: "Tr"Asheville
Posts: 1,937
Likes: 0
Received 0 Likes
on
0 Posts
MAF question... What would cause your MAF readings to go negative at WOT? Right at 4400rpms and MAF readings typically between 40-43 then right after that they go negative under WOT. 
-Sly
-Sly
08-19-2004, 04:13 PM
#3
TECH Fanatic
Thread Starter
Join Date: Sep 2003
Location: "Tr"Asheville
Posts: 1,937
Likes: 0
Received 0 Likes
on
0 Posts
I'm using HPTuners and stock de-screened MAF, it looks like this...
RPM lb/min
------------
3130 15.58
3465 18.61
3616 19.95
3807 23.91
4020 24.28
4126 29.51
4220 33.64
4333 37.4
4474 40.87
4623 -42.04
4789 -37.15
4990 -27.37
5098 -33.88
5170 -24.95
RPM lb/min
------------
3130 15.58
3465 18.61
3616 19.95
3807 23.91
4020 24.28
4126 29.51
4220 33.64
4333 37.4
4474 40.87
4623 -42.04
4789 -37.15
4990 -27.37
5098 -33.88
5170 -24.95
08-19-2004, 05:27 PM
#4
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,605
Likes: 0
Received 6 Likes
on
6 Posts
Seems like that's a sign flip in the program, I seem
to recall seeing something like that on the forum
but thought it was fixed. Never seen it on mine.
Might check that there isn't another, newer PID
for MAF (sometimes they leave the old one lying
around and just add another that works, seems like).
Also make sure you have the latest version off the
download site?
Check their forum, I'm almost sure this has been
brought up & dealt with.
to recall seeing something like that on the forum
but thought it was fixed. Never seen it on mine.
Might check that there isn't another, newer PID
for MAF (sometimes they leave the old one lying
around and just add another that works, seems like).
Also make sure you have the latest version off the
download site?
Check their forum, I'm almost sure this has been
brought up & dealt with.
08-19-2004, 05:35 PM
#6
TECH Fanatic
Thread Starter
Join Date: Sep 2003
Location: "Tr"Asheville
Posts: 1,937
Likes: 0
Received 0 Likes
on
0 Posts
Oh one other thing that throws me for a loop. I checked my logs from my previous engine (stock shortblock H/C setup) and I didn't notice this problem with it....
-Sly
-Sly
08-19-2004, 07:55 PM
#7
Staging Lane
Join Date: Dec 2003
Location: Hayward, CA
Posts: 95
Likes: 0
Received 0 Likes
on
0 Posts
Might check that there isn't another, newer PID (sometimes they leave the old one lying around and just add another that works, seems like