Won\'t boost

[RX7 R2]

Any one had this?

Replaced my NGK plugs rated 10 with 9\'s. Run fine on the drive. Took it a spin and as soon as I got the throttle pedal half open it lost power(didn\'t cut out) and tried to throw me through the window.

A short drive later and it has no problem revving right round the clock as long as you don\'t open the throttle too much. It appears that as soon as the turbo\'s try to boost it does the above, throws me into the window.

I thought it could be the vaccum pipes. I\'ve had a poke around the engine bay and checked all pipes but don\'t really know which is which.

Can anyone help me out?:xconfused

[Carl]

It sounds like boost cut due to over boosting.
Do you have a boost guage on the car?What level of mods are there?
If you are on stock twins with a stock ecu and have an open exhaust you can hit boost cut.
Regards
Carl

[RX7 R2]

Carl

Yeh I\'ve gotta boost guage, no light though so didn\'t notice what it was doing.

The car is standard appart from a Blitz NUR cat back so yeh it\'s still running stock twins/ECU.

So what causes this?

[strange_days_uk]

Boost cut kicks in at a set boost level.  This is factory standard I guess the logic is to preserve the engine\'s life.

[RX7 R2]

It drove fine before I changed the plugs. Is there any main cause why it would of stared boost cut?
Also how can I stop it?

[strange_days_uk]

It also could be loose pipe on the MAP sensor, or something similar.

Boost cut is porgrammed into the ecu.  2 ways to cancel it out:

Cheap: Fuel cut defencer, need to be careful of which type you get though

Proper: Remappable ecu like the Apexi PFC.

[RX7 R2]

I\'ll check the sensor. Daft question time, can you point me in the right direction, where would I find it and how would I ID it?

I don\'t like the sound of the fuel cut defencer. Sounds like it could end up in problems in the long run. Knowing my luck I\'d blow the engine. I don\'t mind the PFC and commander route, gives me a good excuse to buy one.:Thumbsup!

[strange_days_uk]

boxed in red

[RX7 R2]

Cheers for the pic.
Just been and had a good mess and tough around the MAP sensor, well best I can in the dark but no joy at the min.

[RX7 R2]

OK I\'ve re checked the MAP sensor in the light but still no change. Anyone any other ideas they could throw down?

[RX7 R2]

Seconds after posting this I had a thought, reset the ECU which has cured it.