Question about Mazda CX-7
Posted by Anonymous on
Crankshaft position sensor or camshaft position sensor.
Have to replace 1 or both.
Posted on Oct 26, 2013
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Posted on Jan 02, 2017
Don't know much about VW but if it's fine, and it doesn't happen again I wouldn't worry about it. If it does try resetting the ECU by removing the battery terminals and touching the positive lead(red wire) to the negative battery post. It might spark a little, this is just the capacitors discharging, resetting your ECU and starting over. It's like restarting your personal computer
Posted on Mar 21, 2009
you need to take it to your local dealer and raise a big fuss because this is a known problem and if you yell loud enough you should be able to get this fixed under warranty.
Posted on Aug 12, 2009
Not sure that the O2 sensor was bad. It sounds like it was telling you that side of the exhaust system was picking up a lean mixure at the O2 sensor. The O2 sensor was doing its job by telling you the mixture changed. If the O2 sensor was bad, it would say low voltage range for that sensor, or open curcuit.
Now the car has had time to do its diagnostic sweep, it is telling you the same thing, but from a different sensor...the fuel mix is too lean. Air/spark/and fuel is what you need in the correct amounts. In your car, the ECM engine control module controls this by taking readings from all the sensors several hundred times a second.
Mechanically, you have a few options. Change the fuel filter...under the car on the passenger side. It is an easy job.
Change the fuel pressure regulator. This keeps the fuel at 4 BAR so the fuel injectors can do their job correctly. This job just needs a screw driver to pop off the clip that holds it in place. No hoses need to be removed. It is on top of the intake manifold, in-line with a metal fuel line and a rubber one.
The fuel injectors could be clogged up on one side of the engine. Run some fuel injector cleaner through a tank of gas. Also, listen for a constant ticking sound at each injector. If one sounds off PAR, then replace it.
The fuel pump may not be giving you enough power. However, the readings seem to be localized to one side, so I doubt it.
Start with the easiest thing, and see if it works. Also, you will need to get yourself a VAG scan tool. It is the only one with codes in it for all of your VW systems, not just engine codes like the ODB scanners. You can get a nice one for $50 on-line.
Posted on Feb 24, 2010
SOURCE: My Mazda CX7 2008 had
We just had the same problem in Dec 2010. Purchased ours new Feb 2008. Mazda is aware of the issue. They will not fix it if it is out of warranty, but we have been going to the same dealer for service so they offered to pay for the part (EGR @ $450) if we payed for the labor @ $350. We had several problems with the vehicle, from the turbo failing to motor mounts failing to scraping brakes to rattles that would not go away. The problem is the turbo engine is not burning the fuel well enough so the carbon is coming back into the system past the EGR and clogging the system up. Not sure if it's an ethenol fuel related issue or octane issue. Too much unreliable technology. We sold ours the day after we fixed the EGR issue (w/ 50k miles). It was fixed and running fine, so we didn't feel guilty about passing it on. Just kept reading about needing to save for a new engine around 80k miles b/c of clogged engine valves. We went back to Honda...
Posted on Jan 13, 2011
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