6th gear power surging.

[javanc]

It will be ok. What is your build date? look on the drivers door jamb for that info. It could be that you need an ECU update if you dont have the latest version. If you are up to date on that then i would suspect the BOV. I have a boost gauge and a MS CAI, pre flash i had a little hesitation in 6th but nothing like the massive surging you are describing.
Another question is it really hot where you are? Have you had the car for very long? Did you possibly put 89 or 87 in the tank?

 

[Adammazda06]

It will be ok. What is your build date? look on the drivers door jamb for that info. It could be that you need an ECU update if you dont have the latest version. If you are up to date on that then i would suspect the BOV. I have a boost gauge and a MS CAI, pre flash i had a little hesitation in 6th but nothing like the massive surging you are describing.
Another question is it really hot where you are? Have you had the car for very long? Did you possibly put 89 or 87 in the tank?

didn't expect all this from my post. to answer your question. i did have the ecu flash. i have had my car since november 1st. yes it is hot and humid her in NC. only 93 octane. i have never felt this until today. which is why i posted. the initial hesitation and stuttering i had felt a lot like before i had the flash done in the lower gears. no problem in 1st-5th, just number 6. i thought it might be the BOV from the start. i am not happy with the turbosmart, and i will probably get the forge BPV soon. and be selling this turbosmart.

 

[javanc]

I have a feeling that the heat has made this problem more manifest. Although at 75 mph the intercooler will be pretty cool. But temps may be the problem. Do you happen to have a boost gauge? I would install that and see what it reads when you experience the prob. Maybe the heat is making fuel cut, which would be a hard loss of power, or timing retard, though the 93 should help. I would scan it for codes and if you come up with nothing take it to mazda. Try changing the Turbosmart out for the stocker and see what happens. Good luck man and i sure hope i dont get the same prob with an exhaust.

 

[dkswim]

Wow that was great. The mechanic told me if this happened to reinstall the factory airbox.

 

[tru-boost]

my car did not do this until my ms cai. it is worse when it is hot out too.
for those saying not to go heavy on the throttle in 6th ....you are crazy. you dont want to boost at low RPM, but you can boost in ANY GEAR. at 75 in 6th you are at 3k...you are fine too boost. as a matter of fact that is one of the perks of a turbo car. no need to downshift, the tq comes in nice and low.
i think it is something with the wastegate or actuator, but who knows.

 

[MS3ICA]

what do you mean its ok???? then why does my car do fuel cut when i spike? thats not ok....

 

[Adammazda06]

anyone know or think any of the tuners(xede, cobb, standback) might help or fix this? i am waiting for cobb personally.

 

[javanc]

Cuz your Mafs in backwards or crooked. 6th does see some pretty big numbers, but if you have a prosport boost gauge then i think its normal. I have the prosport premium and i pre-flash saw 21-22 consistently as a spike but it would eventually drop to 16-18. Post flash im seeing only 20 wich drops to 16-18. Not that im really paying attention to how quickly or to what exactly the boost holds at.
MS3ICA if your MS CAI is causing you problems then put the stock airbox back on and see what happens. I just think its a little too much for you to get upset and claim the CAI is causing all your problems and that your car is going to blow up without trying to weed out the problem. Like I said it will be OK.

 

[Betelgeuse]

I did a poll on this issue on the other forum and most with the ms cai DID NOT have the issue but some did. It's a problem specific to some cars and the make of the cai doesn't seem to matter.

I don't have this problem at all. I've had the ms cai on now for several months and I floor it in sixth very often. It shouldn't matter what gear you're in, this surging should not happen. As for flooring it in sixth? As long as the car is up to speed (like on the highway) it's no big deal.

Everyone with this problem should have their dealer look at the car. This sounds like something that could be fixed with an ECU flash.

 

[justa4banger]

LOL at all you experts.

Surging shouldn't happen, But if it does its probably your knock sensor pulling some timing due to heat and bad fuel. If anyone on this board can blow up a MS3 engine by running 87 octane let alone anything else FROM engine knock, YOU ARE ONE BAD MOFO...........
Knock is bad, but their are so many safety measures built in the computer to save the engine.

these engine are built to make sure no normal idiot can blow up the engine from poor fuel or extreme heat. thats why you have a knock sensor, boost control.........etc..........

MS3ICA....... you need to calm down and get your facts straight. I'm not denying that your car over boost, but do you have a gauge to measure it? if so, then take it to the dealer and show the service manager the problem and have them fix it. If you have extensive mods, then you need to re-evaluate your mods and get the car tuned for them.

as for the original poster, make sure you are buying decent gas, IF YOU WANT TO KNOW FOR SURE IF TIMING IS BEING PULLED, THE DO THIS............ Buy a can of torco race additive and add it to the tank. if there was ANY knock before and it was causing timing to be pulled , TORCO will eliminate it. I run it in my SVO to the tune of 27psi without any knock.

If the car runs better, then you have a knock problem. probably due to water downed gas. Change gas stations. If it has been extremely hot then this also has to be considered.

Oh last comment about boost in 6th gear. It does load the turbo more, but is it bad for it? **** NO!!!!!!!!! I pass in 6th all the time and enjoy the power from my MS3. It doesn't matter what gear your in, you will only build boost once there is enough load and rpm. once that load hits and boost comes in, the computer will compensate for the correct amount of fuel and timing, UNLESS knock is detected. Like i said no one here can blow up a stock MS3 even if you ran it on 87 octane its ENTIRE life, the computer will just pull timing and move on.

 

[tru-boost]

this car is not like others... it is ecu driven...everything.
it also is not overboosting it is surging. when you overboost the WG will open an dump all boost. the surge has something to do with the way the WG and throttle control work ... not really sure how to stop it without a tune.