If I use FMU for fuel management (without piggy-back, boost up to 7-8psi).

Will it work with my stock MAP sensor?
Will ECU throw any CEL?

 

By my understanding you need to have both. The FMU will increase fuel pressure and the piggy-back will tell the injectors to use that extra fuel.

If you have the extra pressure you need something to control the injectors.

 

As I told you last night Dima, FMU will work by itself, but you will be running very rich.

Most likely after 3.5PSI you will throw CEL. Get an aftermarket MAP sensor!

 

^^^ And a piggy back laugh.gif:

 

He wants to go cheaper/easier way that's why he wants to use FMU. So, no piggy back for him!

 

cheaper isn't always better if he doesn't want the embarrasing orange glow of a CEL lurking in his interior. get both

 

Thanx.
So as I understand FMU can be much easier to use on MAF based Tib.

CEL=bad, so I deffinitely need MAP change. And since new MAP (2 bar) piggy-back deffinitely should be used, cause ECU will not understand new MAP correctly.

So I think I'll go this way for fuel management:
-piggy back
-bigger injectors
-fuel pump

(without FMU)

 

What is it?
How to do it?