Recall for speeds

[SPEED3TYPE2]

Lugging any car in the long gears will cause knock. Computers nowadays move the timing. Our car is unable to correct it with mods or not, whatever. But knocking or detonation are words never to be associated with compressed air systems (read Turbos here). If you have this you need to resolve it. It is a bad thing I do not care who you are. I am not actually trying to be a smartass here. I just worry about rod bearings and such.

some one told me that some of our cars have bad knock sensors thus instead of fuel cut you get knock or boom. and some people have experianced it stock but boost spike in the upper gears is 100x worse with an intake on especially a mazdaspeed intake. I have the mazdaspeed intake and it would spike to 19-20 then fuel cut, now with the standback installed it does NOT spike at all rite on target to what ever boost i set it to.

 

[ericrapp]

No spike

some one told me that some of our cars have bad knock sensors thus instead of fuel cut you get knock or boom. and some people have experianced it stock but boost spike in the upper gears is 100x worse with an intake on especially a mazdaspeed intake. I have the mazdaspeed intake and it would spike to 19-20 then fuel cut, now with the standback installed it does NOT spike at all rite on target to what ever boost i set it to.

That really is interesting. The fuel cut or computer saying f'off to the motor seems to be related to boost almost every time. So some folks lie to the ECU about how much boost is being applied. How does the ECU make a fuel or timing correction when the info it receives is not real. Thanks type two, now you have really got me thinking.

 

[SPEED3TYPE2]

That really is interesting. The fuel cut or computer saying f'off to the motor seems to be related to boost almost every time. So some folks lie to the ECU about how much boost is being applied. How does the ECU make a fuel or timing correction when the info it receives is not real. Thanks type two, now you have really got me thinking.

yeah when the spike occurs (cuased by the additional air comeing in that the MAF isn't "tuned" for) the ecu cuts the fuel to protect from boom...

 

[Bonafide_Spd3]

Well I just had this problem again. I was going about 65mph, and I down shifted to 5th and I didn't get on it for a couple of seconds. When I got on it the studder thing happened... Then I went to do it again and nothing happened. Anyone else having this problem?