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[Varche]

I am still trying to track down why my 2.5 V6 is gutless! It cruises at speed fine but give it a hill and it becomes a Ford Fiesta. This is a long term problem which i have learnt to live with and mostly isn't an issue. Three and a half years ago I had the auto selector switch changed and that improved things a bit but only in as much as the car changed up and down more readily.

Today I thought I bet it is one of the knock sensors - frayed wiring or such. However I have just done the paperclip test and no codes (other than the 12).

is it possible that one could be faulty but not show up on the paperclip test? Any other ideas?

olive

  

[Marks DTM Calib]

Obvious I know but, I assume the fuel filter has been changed.

Cam timing is ok?

Air filter not clogged up?

[Varche]

Oh dear, wazzack in the immortal words of R McB.

I bought a fuel filter a few weeks ago but forgot about it - too much going on. Fitted it today. The car is like "New". What a transformation! I hardly dare say it but looking back through service history I can't see any sign of it having been changed after 40,000 miles. I fitted a new air filter earlier this year along with oil and filter change. The air filter is fine.

Thanks Marks DTM.

olive

[Marks DTM Calib]

lol....it did sound like classic under fueling......

[Kevin Wood]

Ooh, that reminds me. I must change my (leaking!) fuel filter...  

It's nice when a problem is resolved so easily  

Kevin

[Varche]

The reason I thought it might have been one of the knock sensors was that when you put your foot on the accelerator to get up a hill, the engine laboured and sounded as though it was knocking. Presumably that is the effect you get when the throttle is open but not enough fuel gets through. Fingers crossed it hasn't damaged the engine.

I might go up the Sierra Nevadas at the w/e. You can drive from Granada right up to 3,275 metres above sea level on lovely sweeping bend roads! Oh the luxury of it all.  

olive

[Kevin Wood]

The reason I thought it might have been one of the knock sensors was that when you put your foot on the accelerator to get up a hill, the engine laboured and sounded as though it was knocking. Presumably that is the effect you get when the throttle is open but not enough fuel gets through. Fingers crossed it hasn't damaged the engine.

I guess knocking is a possible result of running lean. As you say, hopefully it's OK. I'm sure the engine management would have backed off the timing and kept it running as safely as possible.

I might go up the Sierra Nevadas at the w/e. You can drive from Granada right up to 3,275 metres above sea level on lovely sweeping bend roads! Oh the luxury of it all.  

olive

I'm not jealous at all.   I live in the highest village in Hampshire. It's at 200m above sea level    

I took my MV6 over the alps between Italy and Austria a couple of weeks back. It lost a lot of power at altitude but was clearly coping better than most cars! I even saw a couple of motor homes, though thankfully didn't get stuck behind them. There was what looked like a flat piece of road across the plateau (could have been on a gradient. It's difficult to tell when you've been climbing up through hairpins for an hour). I floored it and my car was almost maxxed out at about 75 MPH. A little bit less than at sea level then. Apparently  

Have fun!

Kevin