An easy way to be rid of those annoying 3Ltr limp mode issues forever.
Welcome to the Nissan Patrol forum. To post a question and to see less adds on the forum then you will have to register
first. We are an easy going friendly forum so join in the conversations and feel free to ask any questions.
Become a forum sponsor for only $20 and see no adds with faster page loading times and many extras benefits.
A zener diode has a breakover voltage. You pick a size thats just under limp mode.
So if you picked 3.9 volts, the MAF volts will rise as normal until you get to 3.9 volts then anything over that is diverted to earth. The ECU will only see upto 3.9 volts.
Yes above that the ECU could do a couple of things, keep injjecting the amount of fuel for that air volume and try to increase the airflow by increasing boost ( which is already over what the MAF volts are telling it )
I would not add the diode without firstly having some form of boost limiter fitted and maybe even a BIG warning light to let me know I have hit the limit so I would know to back off before overboost and under fuelling killed the engine.
Reply With Quote