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My Rb Has Issues, Can U Help Me With One?

Ruthr33

By Ruthr33,
in General Maintenance

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Ruthr33 Enthusiast

Ruthr33

Posted
Posted

Hey, got a question.

Say I'm slowing down and I'm gonna select a lower gear, if give it a boot full to match the revs with the lower gear it can hesitate or feel sluggish with the clutch in free reving.

I have a lightened flywheel aswell so it should respond to my commands quicker than stock.

Vacume leak?

Dirty afm?

Tune?

scotty nm35 Grand Master

scotty nm35

Posted
Posted

What pump and injectors are you running?

I have seen many cases where the fuel pump flows more than the reg can, especially when the injectors are cut on decel. It can cause rich hesitation. Do you have a wideband fitted?

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scotty nm35 Grand Master

scotty nm35

Posted
Posted

What is the wideband reading when you back off? Does it go lean then rich? The turbosmart reg should be fine unless the fuel pressure is set high.

A lot of that light load tuning can be difficult to do on the dyno, if you have the software I would suggest having a play with the lower end of the map yourself if you are confident, or asking your tuner to clean it up a bit.

Also make sure o2 correction is enabled, so the ecu can self tune the light load areas. The fuel requirements can change constantly with the weather otherwise.

Ruthr33 Enthusiast

Ruthr33

Posted
  • Author
Posted

Afr is lean when I back off, I'll check if it goes rich again,

Fuel press set at stock. 37.5 from memory.

The only tune I hav was road tuned via the internet. (I live in the desert)

I have all the tuning gear but inexperienced

The O2 was disabled and it run dog rich,

When I enabled it it cleared up a lot of problems

It's 14.7 in most cruise situations although it was around 16 straight after tune and then changed to 13.5

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