Acceleration And Turbo Lag

[72dudes]

2001 2.2 HDi 72k miles:

 

For the last couple of weeks, when revving hard, like overtaking, have noticed the engine does not like to rev smoothly through the rev range. Instead it quite suddenly stops accelerating at around 3750 RPM.

 

It's not as harsh as hitting a rev limiter, but not far off. Have tried the old "Italian Tune-up" technique, but didn't seem any better.

 

At the same time, I've noticed more turbo lag than usual in the higher gears.

 

There's a longish hill on my way home which you hit after exiting a slow roundabout.

Rev to about 50 MPH in third, change into 4th, I can count 2 or 3 seconds before the car starts to accelerate again.

 

Are the two problems related? Feels like something's blocked but air filter is OK. Is it a dreaded egr valve type area problem (swirl chamber thingy or plastic linkage)

Just want to direct the garage as I'm not technically able.

 

No warning lights and fuel economy is normal

 

Ideas please chaps!

[Randombloke]

Is it a dreaded egr valve type area problem (swirl chamber thingy or plastic linkage)

Just want to direct the garage as I'm not technically able.

 

No warning lights and fuel economy is normal

 

Swirl chamber control valve gives and error message.

 

Has MAP sensor been disconnected or is there cr*p all over the MAF (mass airflow) sensor in the air ducting.

 

MAF sensor is easy to check on 2.2 - 2 screws and you can have a look. Don't touch it though, use compressed air or spray solvent to clean it.

 

MAF sensor easy to spot - near battery in big air hose with some wires on a connector.

[coastline taxis]

Take the hose of the bottom of your intercooler pipe stick it in a bucket and leave overnight to see how much oil comes out of the pipe and the intercooler

Also as random sugests check the maf also turbo boost solenoid valve

What milage is on the car and other than that is the car nippy enough

[techbod]

also check the watergate link rod is still connected the clip on the end has a habit of coming off which switches the turbo off.

[Randombloke]

also check the watergate link rod is still connected the clip on the end has a habit of coming off which switches the turbo off.

 

Wastegate surely? Or does the C5 have a Richard Nixon based problem with illegal bugging?

[coastline taxis]

Now now random youve been on here long enough to know that the only scandal techbod has is with the dealers

[techbod]

:lol: :lol: :lol: that bloody spell checker of mine ;)

 

( wastegate )