C5 2.2 Hdi Rev Limiter

[Guest MJE]

Hi all, my C5 seems to run out of revs at about 4000 rpm, is this correct or do you think something is wrong.

 

Mike

[coastline taxis]

have you got any engine management lights on/does the accelarator cable need adjusting. Can you feel the turbo kicking in.

But lets start with the year model milage petrol or diesel and is it up to date with servicing also any kind of engine niggles

[Guest MJE]

have you got any engine management lights on/does the accelarator cable need adjusting. Can you feel the turbo kicking in.

But lets start with the year model milage petrol or diesel and is it up to date with servicing also any kind of engine niggles

 

Hi, my car is a 2003 2.2 hdi exclusive estate diesel 60000 miles, no engine management lights on, plenty of pedal, how can you tell if the turbo comes in i can't hear anything but plenty of poke upto 4000 rpm. full service history

mike

[techbod]

the diesel isn't that impressive even with a turbo it puts you in the ball park as a 1.8/2.0 petrol engine none asperated so its down to what you want? mpg/power ;)

[mlkey]

Hi, my car is a 2003 2.2 hdi exclusive estate diesel 60000 miles, no engine management lights on, plenty of pedal, how can you tell if the turbo comes in i can't hear anything but plenty of poke upto 4000 rpm. full service history

mike

 

4k is probably about right, only a small turbo on the C5's. Designed to spool up quicker at low revs and give plenty of low down punch, once you get above 3k, it is at full speed and so you will feel the power dropping off. You should have pretty crisp revs to around 3500 RPM before it starts to back off a bit.

 

In reality, these motors are best driven between 1500 and 3000 RPM for the full benefit of turbo, and bearing in mind 70MPH is about 2300 RPM, 4K should very rarely be seen..

 

Find a bit of quiet road with a brick wall on one side, window down, 1200 RPM, give it some pedal as you ut it, and you should hear the turbo whistling like your grannies kettle by the time you hit about 1700 RPM, as well as feeling the power coming in.

[Guest MJE]

4k is probably about right, only a small turbo on the C5's. Designed to spool up quicker at low revs and give plenty of low down punch, once you get above 3k, it is at full speed and so you will feel the power dropping off. You should have pretty crisp revs to around 3500 RPM before it starts to back off a bit.

 

In reality, these motors are best driven between 1500 and 3000 RPM for the full benefit of turbo, and bearing in mind 70MPH is about 2300 RPM, 4K should very rarely be seen..

 

Find a bit of quiet road with a brick wall on one side, window down, 1200 RPM, give it some pedal as you ut it, and you should hear the turbo whistling like your grannies kettle by the time you hit about 1700 RPM, as well as feeling the power coming in.

 

mikey thanks for that, i tow a caravan and noticed for the first time this week that it fades off at about 4000 rpm, would'nt go anywhere near them revs normally. no problem otherwise, will see if i can hear the turbo come in next timr i am out.

 

mike

[mlkey]

mikey thanks for that, i tow a caravan and noticed for the first time this week that it fades off at about 4000 rpm, would'nt go anywhere near them revs normally. no problem otherwise, will see if i can hear the turbo come in next timr i am out.

 

mike

 

you would certainly know if you had no turbo, total lack of power and takes forever to get up the gears..

[Guest MJE]

you would certainly know if you had no turbo, total lack of power and takes forever to get up the gears..

 

Cheers ;) feel a lot better now..

[iannez]

the 2.2 16v hdi (dw12) should rev to around 5200rpm. these have 130bhp and a massive 314nm of torque so if it feels sluggish in any way you have a problem. turbo electro valves and the rods coming off the dozer valves are the 2 main causes of power loss on these engines.

[Randombloke]

I would go with Coastline Taxis advice, and check if the accelerator cable needs slack taken out of it first. It is the cheapest thing to check and sort out, and could be done for nothing if you can do the spanner work.

 

I have seen this issue with other 2.2 C5s, and it was the slack in the cable. I have a 2.2 C5, and the power doesn't run out in lower gears at about 4,000 rpm. 4,500 is easily done and you need to be approaching 5,000 before it starts to tail off.

 

After that, as iannez says it could be expensive.......

[72dudes]

I have a 2.2 C5, and the power doesn't run out in lower gears at about 4,000 rpm. 4,500 is easily done and you need to be approaching 5,000 before it starts to tail off.

 

Yep, I find this engine revs very well for a diesel, don't think I've gone much beyond 4500 though. Easily does 70 in 3rd gear if you're "pressing on" enthusiastically!

 

Interesting iannez says max revs is 5200, that seems high. I've always wondered why there is no red line on the tachometer.

[Malcolm]

Yep, I find this engine revs very well for a diesel, don't think I've gone much beyond 4500 though. Easily does 70 in 3rd gear if you're "pressing on" enthusiastically!

 

Interesting iannez says max revs is 5200, that seems high. I've always wondered why there is no red line on the tachometer.

 

Hi all. I'm not 100% certain of this but I was led to believe the 2.2HDI has a drive by wire accelerator which uses a potentiometer and not a conventional throttle cable. Secondly I run a 2002 2.2HDI and I am fairly sure I have never revved it beyond 4500 rpm and would be disinclined to do so. This would be a pointless exercise anyway as this engine has most of it's torque between 1500 and 3500 and you will actually accelerate quicker by changing up a gear and therefore staying in in the middle of this band. Needless to say the saving on wear ,fuel and noise are yet more good reasons to keep the revs down.

 

Malcolm

[Randombloke]

Hi all. I'm not 100% certain of this but I was led to believe the 2.2HDI has a drive by wire accelerator which uses a potentiometer and not a conventional throttle cable.

 

A cable goes from the accelerator pedal to a potentiometer under the main ECU in the engine bay.