Mazda5 losing power at 3000 RPM

[smileycfc]

Hi

Please Help as I am at a loss. I have had an issue the last 2 weeks now where all of a sudden when I hit 3000 RPM I lose power. If I cluth and drop to 1000 RPM the power kicks back in again as far as 3000RPM. This will get worse the longer I drive it and start to cut out at 2000 RPM. I have to keep a stedy rev between 1000-2000 RPM most times so I drive in a high gear. I have had a few local garages hook up to computers and one picked up the below fault code.

P2401 Evap Emmission system leak detection ring control unit.

The guy in the garage said to me that normally that refers to the EGR being faulty so I had my own mechanic clean it out and it was sooted bad. Still no good. He then shut off the EGR and tested and still same. I have been doing a bit of reading on it and seen a few saying about the MAF so I disconneted that and tested and still same problem.

Any help anyone can give is much appreciated. I have it booked in with Mazda for diags next Wenesday at a cost of 55 first hour. I dont have much choice in this and was wondering if anyone can point me to issue or for me to try anything before I send it up.

Its a Mazda 5 2.0 Diesel sport 2006.

Thanks

 

[Davicho]

Well I'll chime in about the 3000 rpm cut off. Your MZ5 seems to be running on safe mode. Meaning the PCM will not allow it go beyond that rpm to minimize further damage. Once you get it fixed and clear the code. It will also disable safe mode and operate as normal.

 

[smileycfc]

Yes thats what I thought but any ideas on what could be causing the problem?

 

[flcruising]

We don't have diesel Mazda5's here, so we likely won't be much help.
If a gasoline engine doesn't seem to want to rev very high, it could be because of a clogged catalytic converter.

 

[smileycfc]

Just an update

Had car at Mazda yesterday and they put it on computer and tested it. All it is reporting is the EVAP leak code which the guy said is pretty common and doesnt think it is that issue. He can see from computer results that its not detecting
the accelerator being pushed to the board and only shows 80%. He advised the EGR valve is faulty and needs replaced but I have it blocked anyway now to test and running fine. If EGR is blocked off and issue is still happening then I think I can cancel that out.

Basically I am no further forward, I paid them 55 to tell me what i already knew. I now need start trial and error to see what resolves it. I may replace the pedal just to see if it does resolve. Anyone any other suggestions I am more than happy to try.

Smiley

 

[thaxman]

A few days old now, but I wonder if the battery has ever been disconnected, resetting the computers. IIRC, the diesel motor is not a Mazda unit, but I can't recall where it was sourced from. Knowing where it came from may help, as owners of the brand that makes them may have had similar problems that have been resolved.

 

[Abell]

I have the same problem! What was the solution?