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Author Topic: Fluttering / minute hesitiation when cruising  (Read 2083 times)

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jules

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Fluttering / minute hesitiation when cruising
« on: 03 January 2008, 20:57:46 »
When my 2.0 16V is warmed up, at 70 mph there is what I can only describe as a fluttering feeling.

It's not really hesitation as as soon as I plant it, it goes away.

It's there whether I have cruise engaged or not.

Also from cold my fuel pump I think makes a hell of a racket for about 90 seconds after the car has started.

Have I got impending doom and if so what ?

cheers
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Hotel21 wrote 'Its doubtfull in the extreme if it is the head gasket at fault.  If it were burning 5 litres per week the car would leave a smokescreen behind it!'

Marks DTM Calib

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Re: Fluttering / minute hesitiation when cruising
« Reply #1 on: 03 January 2008, 20:59:03 »
Is this hell of a racket from the tank area or the passenger side front wing?

If the latter its the air injection pump.

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jules

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Re: Fluttering / minute hesitiation when cruising
« Reply #2 on: 03 January 2008, 21:02:10 »
It's difficult to tell, I think it's coming from the drivers side rear.

It reminds me of the noise my Sierra 4x4's pump made as it was dying (Incidently in my opinion the last great car Ford ever made was the Sierrra)

But it's only when completely cold and it goes away after about 90 seconds.

I'm thinking perhaps fuel filter and or pump ?

Might be causing this fluttering
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Hotel21 wrote 'Its doubtfull in the extreme if it is the head gasket at fault.  If it were burning 5 litres per week the car would leave a smokescreen behind it!'

jules

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Re: Fluttering / minute hesitiation when cruising
« Reply #3 on: 08 January 2008, 13:16:43 »
Quote
Is this hell of a racket from the tank area or the passenger side front wing?

If the latter its the air injection pump.


It is indeed from the passenger wing area? Have I got a problem ?

Also the fluttering has stopped, just seems to happen when the outside is below 1 degree C

Any thoughts ?

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Hotel21 wrote 'Its doubtfull in the extreme if it is the head gasket at fault.  If it were burning 5 litres per week the car would leave a smokescreen behind it!'

TheBoy

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Re: Fluttering / minute hesitiation when cruising
« Reply #4 on: 08 January 2008, 15:50:05 »
Quote
Quote
Is this hell of a racket from the tank area or the passenger side front wing?

If the latter its the air injection pump.


It is indeed from the passenger wing area? Have I got a problem ?

Also the fluttering has stopped, just seems to happen when the outside is below 1 degree C

Any thoughts ?

No, thats not a big problem. Bearings in SAI pump going. If it is annoying, unplug the motor (its a device to get cats up to temp quicker, and is removed from later engines anyway)
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jules

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Re: Fluttering / minute hesitiation when cruising
« Reply #5 on: 15 January 2008, 12:50:04 »
Worked out how to do photos, (you wouldn't think I was a Network admin would you?)

What is this part on a 2.0 16V. The bit in between the vacuum chamber thingy and the bonnet switch ? As you can see the brocken connector is hanging above it on the vacuum pipe.

would this cause erratic idle ?




Cheers
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Hotel21 wrote 'Its doubtfull in the extreme if it is the head gasket at fault.  If it were burning 5 litres per week the car would leave a smokescreen behind it!'

shyboy

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Re: Fluttering / minute hesitiation when cruising
« Reply #6 on: 15 January 2008, 13:32:33 »
The air injection pump on my 2.0l used to create a racket on starting from cold, but always stopped at exactly the same place on my journey, after about 2 minutes. It eventually packed up altogether and made absolutely no noticeable difference. I never bothered to look at it.
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jules

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Re: Fluttering / minute hesitiation when cruising
« Reply #7 on: 16 January 2008, 11:49:18 »
BUMP !

I also read this from the ECU :

P0100 there is not present

Anyone ?

Cheers
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Hotel21 wrote 'Its doubtfull in the extreme if it is the head gasket at fault.  If it were burning 5 litres per week the car would leave a smokescreen behind it!'

cem_devecioglu

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Re: Fluttering / minute hesitiation when cruising
« Reply #8 on: 16 January 2008, 11:56:58 »
P0100 Mass Air flow sensor..

Also describing your hesitation..

But MAFs rarely fail totally..Check the sockets , un-plug and plug again (when the engine not working)
« Last Edit: 16 January 2008, 12:01:18 by cem_devecioglu »
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Kevin Wood

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Re: Fluttering / minute hesitiation when cruising
« Reply #9 on: 16 January 2008, 12:12:12 »
Check for any air leaks in the intake ducting and vacuum system as well. Any unmetered air getting in will cause the MAF to misread, thus casting doubt on the sensor itself.

This would result in lean running, which does tend to manifest itself as slightly hesitant running.

Kevin
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cem_devecioglu

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Re: Fluttering / minute hesitiation when cruising
« Reply #10 on: 16 January 2008, 12:19:34 »
Quote
Check for any air leaks in the intake ducting and vacuum system as well. Any unmetered air getting in will cause the MAF to misread, thus casting doubt on the sensor itself.

This would result in lean running, which does tend to manifest itself as slightly hesitant running.

Kevin


Agreed..generally leaks are from the o-rings under the plenum as they become old and tiny..

forgot to add if the performance of the car changes with temperature

changes means, MAF is not in good condition..

« Last Edit: 16 January 2008, 12:23:12 by cem_devecioglu »
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jules

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Re: Fluttering / minute hesitiation when cruising
« Reply #11 on: 17 January 2008, 10:49:27 »
You guys are amazing, thanks.

Unplugged the MAF sensor and blew on both ends, plugged it back in

FIXED !!!!

I know it's fixed because my car usually stalls about a dozen times on the way in to work in the morning (I was going to clean the idle valve but hadn't connected the two faults) and since I did this, it hasn't stalled once !

Now all I need to know is what the broken part in the picture above does.

Cheers

 8-)
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Hotel21 wrote 'Its doubtfull in the extreme if it is the head gasket at fault.  If it were burning 5 litres per week the car would leave a smokescreen behind it!'

martin12760460

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Re: Fluttering / minute hesitiation when cruising
« Reply #12 on: 17 January 2008, 11:57:39 »
cool  :y
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markey mark

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Re: Fluttering / minute hesitiation when cruising
« Reply #13 on: 17 January 2008, 13:53:48 »
the part in picture whats broken bud is a soleniod valve !! not sure what it does on 2.0 but on my 3.0 it controls the dual ram system !!
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