Sluggish Tdi

[Kam]

In this warm/hot weather, my car seems to feel sluggish. First time I have driven a diesel in the summer and I am quite surprised it has affected the car as much as it has.

Anyone else got the same problem? Like a 1.8T Leon, will cutting vents in the wheel liner help the intercooler to help it cool and improve things?

 

[slimjim]

Is it a BIG difference?

Is it OK if you drive it at night in the cool? Or could it just be something has happened co-incidentaly with the hot weather? i.e. dead MAF?

 

[Kam]

Not a BIG difference but a distinct lag in mid revs. I don't think there is anything wrong with the car ...

 

[slimjim]

Not a BIG difference but a distinct lag in mid revs. I don't think there is anything wrong with the car ...

So you have tired the usual driving with and without the MAF connected then?

 

[sssstew]

yeah i must say ive noticed it too, just seems a bit less torquey, all due to the higher temps though. damn that fine weather!

 

[Sisson]

i noticed it a few weeks back when the temp reached 25 degrees, my car went into limp mode twice wouldn't accelerate past 75 and intake temps were 95 degrees,

Now i have the forge FMIC and my intake temps don't go above 40 degrees and its like driving in the winter even when its 30 degrees outside,

 

[mpm1987]

mines feeling sluggish tooo, may be because i have the climate control on aswell

 

[Kam]

So you have tired the usual driving with and without the MAF connected then?

No, not done that. I have driven a car with a knackered MAF and this is like that. Turbo is spinning as it should .... just less torquey!

FMIC ... that would be nice but I cannot justify the cost for the sake of a couple of months fine weather

 

[devonutopia]

Not sure whats wrong with the car,or even what you said in the posts - that avatar keeps dustracting me!

I would say you may be suffering from heatsoak - if performance is better on cooler nights, this should affirm that theory.

Dodgy MAF usually kills the boost all togother when its on the way out.

 

[Muttley]

Is the air-conditioning on? The compressor will be cutting in more frequently as the weather gets hot, sucking power from the engine: depends on speed, but could be 10 bhp at higher revs

 

[mpm1987]

took mine out tonight, and she was running nicely again, i put it down to warm weather

 

[slimjim]

Yup ... I did notice a difference with the heat soak over the weekend.

Just have to put up with it till the rain comes...


Oh look, here it is.

 

[Kam]

ummm ... yesterday was bad - down on power, fuel economy was terrible! Normally average at 49 - 50 mpg. Yesterday, it was struggling 43 mpg and everytime I accelerated, the average figure would tumble.

Today will be as bad I think.

 

[slimjim]

Maybe we should patent an easily removable IC. two clips and it's off.

Then you could spray it with a little water and leave it in the freezer over night!

 

[Kam]

Amazing that VAG place the intercooler where it is. It needs better airflow, I am sure these engines need to work in climates hotter than the UK!

 

[devonutopia]

Have you tried the pikey wheel arch liner vent mod?

 

[Kam]

No, did think about it a month ago, should have gone with the thought....

 

[muddyboots]

Have you tried the pikey wheel arch liner vent mod?

What is this exactly, is it just a case of cutting slits in the plastic and angling them with the aid of a heat gun ?

Or is there a better way of fitting some kind of grille ?

Unlike the Ibiza, the Passat doesn't have a vented liner. Having said that, logging the temps with vag-com suggests it still gets better airflow than the Ibiza did - couldn't break 60degC, although ambient was only 10degC.

 

[sssstew]

you can either mod it yourself like you say lee or buy the Audi TT add in vent section.

 

[Ant FR]

yeah i must say ive noticed it too, just seems a bit less torquey, all due to the higher temps though. damn that fine weather!

i tried that on mine and with MAF disconnected it would'nt even boost at all, is that normal