3G: Engine vibration on startup

Post by **Wayne2014** » Tue Dec 02, 2014 10:20 am

Hi

My 3G initially started to rev up and down,
up and down between 900-1100 rpm but only during idle.

Garage say its some thing that needs to be cleaned out.
So after a major service the problem was fixed!

But
Now my car starts in the morning to 1500 (which i told is normal) then it drops to 900 - thats fine.

But at 900 idle and ONLY in the morning,
it vibrates as though the engine about to stall

Vibrates so much i can feel it clearly in the brake pedal (when stopped) and shaking some part of cabin to hear rattles now

Garage had it for 2 days and checked and cleaned everything but cannot find fault.

They dont have the OLDER cable to plug into my car to diagnose neither

They have suggested to add injector cleaning additives to petrol tank - it maybe injectors clogged up?

I only used Shell V-Power - is this not good enough to clean injectors?

Can anyone help?

Thanks

Post by **Lude-dude** » Tue Dec 02, 2014 10:55 am

this is the 2.0i 16v model right?

do they have some kinda fitv valve or IACV?

this is how mine behaves on cold start, because I have deleted the FITV (fast idle thermo valve) on my 5g

so some kinda similar valve might need cleaning out on your car

Post by **Pushki** » Tue Dec 02, 2014 11:01 am

Some Redex in the tank wouldn't hurt.

Post by **Wayne2014** » Tue Dec 02, 2014 11:10 am

Lude-dude wrote:this is the 2.0i 16v model right?

do they have some kinda fitv valve or IACV?

this is how mine behaves on cold start, because I have deleted the FITV (fast idle thermo valve) on my 5g

so some kinda similar valve might need cleaning out on your car

Awww
Yes 2.0i 4ws

And yes - think service book mentions that IAVC valve thingy ..

Post by **Wayne2014** » Tue Dec 02, 2014 11:10 am

Pushki wrote:Some Redex in the tank wouldn't hurt.

Might have too

Post by **Wayne2014** » Tue Dec 02, 2014 11:13 am

This???

Post by **Merlin** » Tue Dec 02, 2014 11:18 am

Wayne2014 wrote:But
Now my car starts in the morning to 1500 (which i told is normal) then it drops to 900 - thats fine.

But at 900 idle and ONLY in the morning,
it vibrates as though the engine about to stall

Can you explain this a bit better?

Post by **Wayne2014** » Tue Dec 02, 2014 11:31 am

Merlin wrote:
Wayne2014 wrote:But
Now my car starts in the morning to 1500 (which i told is normal) then it drops to 900 - thats fine.

But at 900 idle and ONLY in the morning,
it vibrates as though the engine about to stall
Can you explain this a bit better?

Yes
Problem ONLY happens in the morning.

Start car
Rev goes up to 1500, then drops to idle at 900

Then whilst car is stationary (or whenever i stop and before engine is warm),
Engine vibrates just like when a cars about to stall.
The rev dosent really move
The cabin vibrates such bits that didnt rattle before, now rattles.
It just feels like its gona stall any minute.

It makes me think "oh this is when i wish i had a manual choke!" Lol

One thing,
I do hear a sort of noise sounds like the engine trying to regulate something (cant explain sorry).
But difficult to hear and not that noticeable.

Once engine is warmed up - its fine at 900 idle

Post by **Donald** » Tue Dec 02, 2014 12:50 pm

Move your clock 12 hours forward.

Happy to help.

Post by **Vtecmec** » Tue Dec 02, 2014 1:15 pm

Sounds like the fast (cold) idle is not doing it's job properly.