Thread: Did i fry my ECU or is it my MAF

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

From my experience, wiring the MAF backward will fry it, but won't harm the ECU. It's happened to me a couple times on some replaced MAFs from yards that didn't match with wiring and I FUBARed the connection. Every one I wired improperly got fried, but never did any damage occur to the ECU. My best advice is to see if you have another MAF you can try quick just to see if it'll allow the car to get out of limp mode.

Having the maf wired backward can indefinitely fry your ecu... no doubt about it. My friend who has a 240 was having the same problems on a tuned ecu, found out his z32 was wired backwards... we tested for continuity and the voltage signal for the ecu was very low... sent the ECU back and it was confirmed by the provider. He had the ecu fixed and he is still having problems.

So I would still check the ecu if it was me... that's just my opinion though.

yeah i fried my ecu in a GA16 sentra, Not fun. 2 weeks later the Ignition switch went out also.

I purchased this rt ecu, and have the exact same issue. Don't have a clue what the issue is.