307 HDi Manual acting like an Auto

[irishboyracer]

Afternoon all

I've a 2004 2.0 HDI 307 which has been acting a bit funny. When ever I press the accelerator down to half power or more the engine revs jump up about 1000-1500RPM (with very minimal acceleration) then the revs fall back to round about where it started and the car accelerates off. its more noticable in 3, 4 and 5 and 6. It reminds me of driving in America and when you put the foot down on their autos and the engine revs jump up and then falls back, the kickdown hits in and you speed off.

I thought it was the fuel filter as I had put injector cleaner through the system a few months back and then noticed this issue started to happen. I had this replaced this week and whilst the acceleration has improved noticable, i'm still seeing the engine revs jump up under heavy acceleration.

any ideas?

cheers

[battlestar]

Kinda sounds like a clutch to me. How does it feel under your foot, any wonky sounds, smell etc?

[irishboyracer]

Clutch feels fine, cant say i've heard any noises coming from it either. Doesnt feel like theres been any slippage on it

[collyflowercheese]

sounds like your clutch is slipping

[philkerman]

As mentioned by those before me, sounds like your clutch is slipping.

Phil

[irishboyracer]

cheers for your thoughts, but i'm not convinced on the clutch being the issue.

there's doesnt appear to be any slippage when testing it on level ground in 4th and 5th and the acceleration when it kicks in or when depressing the accelerator less than half is pretty smooth.

I've had a previous issue where the car seemed like it was hitting a wall at 3000rpm in 3rd under strong acceleration and if you took you foot off and back on again it was ok. On that occasion Peugeot diagnosed it was a fuel filter issue and it ran fine after that was replaced. People i asked said clutch, which was what i had though as well. I'm not ruling anything out but i'm wondering if it could possible be sensor related. I think I will borrow a colleagues code reader and see if there are any codes sitting on the CPU and report back.

[jmkent]

Drive along a flat road at about 40 ish... then put it in 6th and put foot right down.... if clutch is slipping, you should be able to see the result. The 136bhp 2.0HDI engines have quite a lot of torque, so this should show up if revs increase without speed.