Make Mazda
Model 6
Engine size/Type 2.0TS Petrol
Year 2006
Mileage 100000
Looking for some suggestions for an ongoing prob. MPG dropped to abt 75% and at the same time I started getting a rough idle and rough drive at low RPM. Gunning the accelerator would clear this, and acceleration has been unaffected.
I dont have the original Engine Management errors but they were all linked to o2 sensors (stuck) plus possible CAT, MAF. Errors were cleared once by mate and came back within 100 miles, and 2nd time after first garage visit.
Work already done (first garage) include MAF, sparks, air filter replaced, throttle body cleaned. No difference.
I then got a 2nd garage to replace the rear o2 sensor and immediately after this, the car never missed a beat for 2 tankfulls, but the fuel efficiency was still poor, and exhaust stank (rich?).
Finally, I got a front sensor and garage 2 replaced this last week. Immediate improvement to fuel efficiency, and no more Rich smell from exhaust, but the sluggish hesitation has returned, with one stall. No ECU errors (yet) but I'm stumped at what to look at next.
I didnt think the rear sensor controlled fuelling but replacing it did make an instant improvement to the idle/slow speed.
I have an OBDii reader and Torque passes the o2 sensor check since I replaced the from sensor, although I cant work out the tolerance levels and it takes quite a while to complete the test from startup (10 mins plus).
<HELP>
Model 6
Engine size/Type 2.0TS Petrol
Year 2006
Mileage 100000
Looking for some suggestions for an ongoing prob. MPG dropped to abt 75% and at the same time I started getting a rough idle and rough drive at low RPM. Gunning the accelerator would clear this, and acceleration has been unaffected.
I dont have the original Engine Management errors but they were all linked to o2 sensors (stuck) plus possible CAT, MAF. Errors were cleared once by mate and came back within 100 miles, and 2nd time after first garage visit.
Work already done (first garage) include MAF, sparks, air filter replaced, throttle body cleaned. No difference.
I then got a 2nd garage to replace the rear o2 sensor and immediately after this, the car never missed a beat for 2 tankfulls, but the fuel efficiency was still poor, and exhaust stank (rich?).
Finally, I got a front sensor and garage 2 replaced this last week. Immediate improvement to fuel efficiency, and no more Rich smell from exhaust, but the sluggish hesitation has returned, with one stall. No ECU errors (yet) but I'm stumped at what to look at next.
I didnt think the rear sensor controlled fuelling but replacing it did make an instant improvement to the idle/slow speed.
I have an OBDii reader and Torque passes the o2 sensor check since I replaced the from sensor, although I cant work out the tolerance levels and it takes quite a while to complete the test from startup (10 mins plus).
<HELP>