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Injen Intake Causing Limp Mode/ Engine Lean Code?
Vehicle: My car is a 2003 6s manual with rebuilt 2006 motor; 80K on the motor, 133K on the frame.
Symptoms: erratic idle (revs will drop to around 500 then to 2K-2.2K), uneven acceleration, engine stumbles...this past Saturday, engine revs would not pick up and could not accelerate beyond around 60mph. Now car can barely get out of first gear: I have to rev my engine as if clutch is about to go (which is not the case, put in Clutchmasters clutch in February) just to move 10 feet. I had this issue with the Cordova TB, I went back to stock TB and same issues. Check engine light is on (sorry do not have code, but its a lean code). 02 sensors are working fine (running msds headers with upstream and downstream 02 sensors...I live in VA).
Proposed solutions: My shop states that my car just doesn't "like" the Injen intake and wants to put the stock airbox back on. I'm not a mechanic but I don't think it's necessary to remove the intake- I already swapped the TB and I just don't want to go through the trouble of putting in the stock airbox...oh, plus I sold it. My shop is going to look at replacing the throttle position sensor, egr, and MAF.
Unanswered questions: Should I consider purchasing an updated TB harness from Mazda? Cordova does not sell them anymore so I'm forced to deal with the dealership on this one. Lastly, could I be dealing with an ECU that just is not "relearning" properly? If that is the case, can the dealership update the ECU (or is it called "flashing").
Anyway, I know my issue is not unique and definitely a combination of things already posted on this forum. I've read the related posts (that hesitation problem again, TPS issues, etc...) but still would like some input and guidance. Any help appreciated- thanks!
2003 Mazda 6, 3.0L V6 MT: Injen CAI, Magnaflow catback, Vibrant high-flow cat, MSDS headers, Mcculloch 6000K HIDs
2008 Ford Focus Coupe S - mostly glamour mods, ask me what happened.
2000 Passat 1.8t - stealth attack, ask me what happened.
*see photo album for mod details*