Speed3Joop
Junior Member
- Jul 28, 2020
- 3
- 0
- 6
I've been experiencing this power loss at 3000RPM as well on my 2008 Speed 3. I have DTC test results before I replaced some things. I need to test again.
My CEL has been on since I got the car. Well, soon after I got the car. It's had issues from the star that I have been trying to get worked out. I have had the ECU re-flashed and updated by the Mazda dealership
I've replaced the weird aftermarket intake with an OEM Speed 3 intake (GRMS-8M-L29), not the airbox. With that I also replaced the autozone MAF with the OEM (L3K9-13-215-9U). Most recently I've replaced both O2 sensors, the one in the engine compartment (L33X-18-8G1C) and the one under the car (L34B-18-861B) both with OEM.
I have 4 NGK 3787 ILTR6A-8G Laser Iridium Plugs on the way. These are the best ones that are meant to fit the car. I am also going to replace some of the tubing and hose clamps associated with the intercooler when I do replace the plugs since you have to remove it anyway.
I plan to take a look at the EGR valve as well, and clean that up, maybe replace it if it won't come clean.
I'll update once I get to fixing. Linked are my pre-O2 sensor replacement readings from the BOSCH diagnostic tool Mazda uses. It won't allow me to attach at PDF and its 10 pages long.
My CEL has been on since I got the car. Well, soon after I got the car. It's had issues from the star that I have been trying to get worked out. I have had the ECU re-flashed and updated by the Mazda dealership
I've replaced the weird aftermarket intake with an OEM Speed 3 intake (GRMS-8M-L29), not the airbox. With that I also replaced the autozone MAF with the OEM (L3K9-13-215-9U). Most recently I've replaced both O2 sensors, the one in the engine compartment (L33X-18-8G1C) and the one under the car (L34B-18-861B) both with OEM.
I have 4 NGK 3787 ILTR6A-8G Laser Iridium Plugs on the way. These are the best ones that are meant to fit the car. I am also going to replace some of the tubing and hose clamps associated with the intercooler when I do replace the plugs since you have to remove it anyway.
I plan to take a look at the EGR valve as well, and clean that up, maybe replace it if it won't come clean.
I'll update once I get to fixing. Linked are my pre-O2 sensor replacement readings from the BOSCH diagnostic tool Mazda uses. It won't allow me to attach at PDF and its 10 pages long.
Speed3_IDS_121719.pdf
drive.google.com