ECU reflash at Mazda

S

Shane5425

Contributor
:
2011 Mustang GT
my brother in law is the master tech there, i was bored and went bulls*** with him, and some of the other guys around never seen a speed3, so.. i pulled it in... this dealership isn't a speed dealer they dont see to many of them, but my bro is a Speed Cert tech. anyways, he plugs the car to the computer to see if anything could update.. sure enough there was a ECU re flash. so we said what the hell, loaded it up, i have been driving around all day and i must say i have more power in all gears, and the power ban is allot smoother.
From what i glanced at on the pc is that the TSB was for some type of emissions recalibration.. basically leaning it out a bit.. that was just what this car needed..

I cleaned off the tail pipe of all the black soot and i am gonna run it for a week, see if it stays clean. btw i have MS CAI and MS CBE
 
no, he clicked off the screen before i could read it.. ill see if i can find out, regardless the Computer has to scan the ecu to see if it is applicable to reflash..
 
Im taking my car in tomorrow and they said there was a new flash that came out in october and I never heard anything about it.Im also getting that p2006 recall done and my cruis control button dont work.
 
no, the ecu is tuned way differantly.. it might have a similair update, but it wont be the same one as the ms3
 
Mine is too. I dunno when I'll take it, probably have to wait a few months. But really, is there a reason if I'm getting the AP, it'll be tunedto run leaner, so wouldnt that fix the problem?
 
mrlilguy157 said:
:D I do what I can!

Why go to the dealer for an upgraded pump if you can come to me sirrrrrr
Click to expand...



Now theres the question. Does anyone have the comparison from the factor upgraded CDFP from Mazda Corporate vs. Lil guy vs. CPE. Which one do you get? Right now without looking i say factory warranty??? But hell I dunno you are all much smarter than me.

Jonathan thanks for the info, at the risk of your own busienss you educate(top quality).... so educate more so that we come to you??? or what is the recommendation in light of this development for a new pump? HELP.
 
gonna have to go look at the fuel pump to see its production date.. wonder if i can see it from up top?..
 
For vehicles built before April 7, 2007 that are experiencing the conditions as noted in this service bulletin
after the PCM calibration update, perform a Warranty Vehicle Inquiry using your eMDCS System and
inspect Warranty Claim Inquiry Detail for high-pressure fuel pump replacement.
• If no prior history of replacement, replace the high-pressure fuel pump.

so It looks like those before 4/07 have the old(er) pump?

mines 2/07
 
mine was built in sept or august... forgot.. will call my brother tommorow and see if he can pull it up again.. i should be safe with my fuel pump.. but the ecu was reflashed to newest and it make a big differance..
 
Here ya go guys!

it is not a new upgraded pump from mazda.... the internals are the same (I have seen old pumps and new pumps), instead, it is the 'spill-over solenoid' on the top of the pump (the electrical connector goes to it). That is what regulates pressure with the pump and to the hard fuel line, further going to the injectors. A pin moves up and down pushing on a cap and spring assembly (itty-bitty, maybe 1/4" big), to regulate flow of gasoline to the pressurization chamber.

In no way will any body be getting a free upgrade from mazda! LOL. The pistons diameter and bore diameter are the same, no doubt about it, whatsoever. The reaction time of that solenoid (what the PDF directly talks about!) is prolonged due to the need of a larger current to run different variations of solenoids, or the 'slow response'. They arent talking about the response of the piston/bore assembly - that will always be the same - the cam is always spinning!

I hope this makes good sense to you guys. The ECU reflash will most likely raise the goal AFR of the car and ECU, which would allow higher pressures in the fuel rail, always, due to less fuel escaping the rail through the injectors and into each cylinder.
 
mrlilguy157 said:
Here ya go guys!

it is not a new upgraded pump from mazda.... the internals are the same (I have seen old pumps and new pumps), instead, it is the 'spill-over solenoid' on the top of the pump (the electrical connector goes to it). That is what regulates pressure with the pump and to the hard fuel line, further going to the injectors. A pin moves up and down pushing on a cap and spring assembly (itty-bitty, maybe 1/4" big), to regulate flow of gasoline to the pressurization chamber.

In no way will any body be getting a free upgrade from mazda! LOL. The pistons diameter and bore diameter are the same, no doubt about it, whatsoever. The reaction time of that solenoid (what the PDF directly talks about!) is prolonged due to the need of a larger current to run different variations of solenoids, or the 'slow response'. They arent talking about the response of the piston/bore assembly - that will always be the same - the mcam is always spinning
Click to expand...


I have no idea what you are talking about. I didn't know mazda changed the fuel pumps in the later models. Are the newer ones any better. Make sure to moniter gas mileage after the flash. We need someone with a dash hawk to get this done.

I hope this makes good sense to you guys. The ECU reflash will most likely raise the goal AFR of the car and ECU, which would allow higher pressures in the fuel rail, always, due to less fuel escaping the rail through the injectors and into each cylinder.
 
Last edited:
i found where you posted but you may want to revise that post, its hard to find!

milage will be the same, the injected amount of fuel is no different, unless the ECU recalibration has changed. If its leaner, you'll burn less fuel and make more power
 
so, this would help anybody? I better get my ass over to mazda!
How do I know if theyre certified for speed vehicles? If they sell them, would it work? or no?
 
yes. speed dealerships all service the cars IIRC.

There is no reason not to get the reflash, and the pump swap they're doing could be beneficial to all, but if you've already got the upgraded pump, then I dont think its absolutely necessary unless you've found a flaw in the upgraded pump's performance (doubtful :D )
 
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