Technical Loss of power at low rpm and when pressing pedal to the end

[kandilx]

Hi i recently have a power problem , I can notice a loss of power (it seems to me like lack of torque ) when trying to accelerate by pressing the gas pedal to its maximum and it only happen when the rpm is lower than ~2500 at higher rpm it seems the car is fine
I have doughts about throttle sensor or vacuum leak any suggestions?

 

[skeogh]

First thing is check to see if any fault codes are saved, alternatively have a compression test done and replace HT leads

I had a similar issue not so long ago, I replaced HT leads and popped out the throttle body and gave it a really good clean. Been fine ever since.

 

[Ziggy122]

Ensure the throttle is fully opening

But i'd be getting a basic code read done

Ziggy

 

[fingers99]

Code read and tell us, 16v or 8v?

 

[kandilx]

Mine is 8v there is no error code and readings of intake pressure throttle angle, coil charging time seems to be OK except for "calculated advance" the normal value is around 7 but there is a jump to 6500 when hitting the gas pedal

 

[Ziggy122]

coil charge time should be about 2.0 to 2.3 milliseconds
When my coil failed it was taking 2.9miliseconds to charge and would then miss

The screen snap isn't showing the whole picture

Ziggy

 

[kandilx]

Here the coil charging time I think one according to you need to be changed or it can be the spark plug or wires?

 

[Ziggy122]

as i said, when my car went from normal to "limp" as the coil started to break down
The charge time went from 2.3milliseoncds to 2.9milliseconds

Ziggy

 

[kandilx]

I've changed the coil but the car is the same and maybe worse ! Any ideas?

 

[kandilx]

I remembered something the problem occurred after I clean my engine with gunk engine degreaser can it be the cause?

 

[C009Y]

I have the same thing with mine. I took it to a garage today and they advised me to get new head gasket and cam belt.

 

[Ziggy122]

I remembered something the problem occurred after I clean my engine with gunk engine degreaser can it be the cause?

I have the same thing with mine. I took it to a garage today and they advised me to get new head gasket and cam belt.

HG why? Did they do a sniff test? a Compression test?

Cambelt on any HG is sensible, but on the 8v, i wouldnt unless your fitting new pump/bearing as they might eat each other
The 8v is an interferance free engine

Ziggy

 

[kandilx]

I have the same thing with mine. I took it to a garage today and they advised me to get new head gasket and cam belt.

HG! Does this happen on yours when the car is warm?

 

[C009Y]

HG! Does this happen on yours when the car is warm?

No when the car is warm it doesn't.

 

[Ziggy122]

If the car seem to lag when cold and then clears when warm

Do a compression check

why -

I had a ""lag"" struggling sensation when i first started up
After 1 or 2 mins of running it was fine

But i would often find clouds behind me.....
Turns out cyl1 was soaking in oil on cold run, burning like crap, and causing poor running

A dry then wet test could help here

ziggy

 

[s and b]

back to basics
suggest you do plugs and leads before ecu pops
those graphs lok fine to me by the way

 

[C009Y]

I'll give this a check. I took it garage like a said and he said common things on theses are head gasket. But I have noticed there's is a bit of a oil leak. Not loads. But some. And also the water pipe from radiator to the engine is like it's full or something. Now I tthought I just could put some stuff in there hopefully clear this out. But I haven't tried thos. I just hope I won't break down tonight as im driving over 80 miles tonight. Personally I can't see a problem just having that juddering thing the same as the lad who has also posted this.

When you say cyl1 I'm guessing cylinder? And is this a expensive part I got quoted 200 quid for new hg and belt.

 

[C009Y]

also my car has a hair line crack in the central part of exhaust but mechanic said this shouldn't cause the juddering.

 

[kandilx]

back to basics
suggest you do plugs and leads before ecu pops
those graphs lok fine to me by the way

So far I already changed one coil pack and yesterday I bought new plug and fitted them and check the the HT wires resistance and it was OK , my car do the symptoms I stated before after the car is warm ,and sometimes while the car is warm all the symptoms disappear and and the car run normally!

 

[kandilx]

Yesterday and today the car was fairly normal all symptoms disappeared ! So I guess the problem was related to the degreaser I used earlier .