Did i fry my ECU or is it my MAF

byronchrisp05 · 02-05-2008, 09:55 PM

My car is in limp mode and i have narrowed it down to either a bad maf or fried ecu. I need help figuring out witch one it is.

Set Up: b14 rt calum, 9.5:1, z32 maf, 370's@4bar

Problem: The voltage on the signal wire drops to 0 when it is hooked up to the oem harness to the computer, but when the wire is open (not hooked to the b14 harness) it has around .6 volts

What i have Checked:
The maf IS wired right
I have continuity from the maf to the ECU
maf has a good ground
Maf has 12 volts

When i was doing a little research i found some thing about measuring the signal voltage in AC....I tried this and had the same problem

I did have my Maf wired backwards, i have heard mixed things about damage to the ecu.

The maf signal voltage is just a little bit low, so that is why i was thinking that could be the problem.

What i need help with:
Looking for the ohm spec for the z32 maf
A tune for a b14 with a stock maf, and 370s (so i can rule out my maf)
Any way i can check the ecu to tell if it is fried
And anything anyone can find i looked over

Calum · 02-05-2008, 11:24 PM

Hi Chris,

I e-mailed you a B14 program when I shipped the ecu, did you receive that e-mail? I will resend.

Have you got a consult program working yet?

Can you call me? My number is 615-417-5740

byronchrisp05 · 02-06-2008, 03:28 AM

Yea i got that program, but since then i have changed my injector, maf, set up. So the one you sent me wont work. Ill give you a call later this week, when i have a chance to triple check everything.

byronchrisp05 · 03-01-2008, 02:32 PM

i tried a new maf but that didnt fix it

calum i tried to call you but your vm box it full, so i left my call back number

Slut · 03-20-2008, 06:42 PM

I too have the same issue.. My car wont rev past 3k until it goes into limp mode... Dunno if its calums ecu or the GTir MAF i have... My afc shows the MAF voltage... shows .5 engine off... about 1.2-1.5v at idle... and goes up from there when I rev it so it should be working... All I know is until it goes into limp mode I cannot drive the car... Give it gas.. Revs then just cuts out like it aint reading the air... I dunno what to do. I guess I might have to try rewiring in my old B14 stock MAF... turn down the boost a little bit see if it helps.. But ive always heard people having problems running the stock maf blow-thru.. so we'll see what happens. In limp mode, does the car still read the MAF? Cause going through consult the ecu shows the same MAF readings my AFC does..