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Ford Turneo Connect 1.8L Zetec 2005 - Engine loses power below 3000 rpm #

Posted by Alexander Dmitriev on February 18, 2015, 10:35 am

Year of Manufacture *: 2005
( Optional ) Engine Code or CC: Zetec

Hello everybody, will you please give me some advise because I have no idea what’s wrong with client’s Ford Turneo.

The symptom is that the engine goes down (loses power), while you are pressing accelerator and REVs are below 3000RPM. After 3000 the car goes quite normally.

Connecting scan tool I can see engine runs on idle in closed loop, both O2 sensors are varying from 0.2 to 0.9 volts and values of long and short fuel trim not access 1-2%. I think it is quite normal. On idle the only thing disturbing me is “engine load” - this parameter is 42% (I think it’s too much for idle).

Strange things start on go. Starting acceleration on 1st gear engine loses power. According to scan tool: TPS value is about 50%, engine load is 100%, short term fuel trim value quickly increases up to 33%, both O2 show 0,02 (it’s extremely lean!).

I replaced MAF sensor, and nothing is changed. It seems that something wrong with fuel system and ECU can’t compensate lean mixture. But how to explain rather good performance on REVs above 3000RPM?

Do you have any idea wat’s happening?

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by Nick Favell <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3407' width='330' height='300' border=0 style='border:none;'> on February 18, 2015, 12:48 pm, in reply to "Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"
Nicholas Favell

Assuming the O2 sensors are corrctly reporting a lean mixture, check the basic mechanicals.
Timing belt history? - possibly incorrectly fitted recently.
Vacuum leak on the manifold? whats the MAP sensor reading, does a vacuum gauge agree? Smoke test inlet system?
Just my immediate thoughts, can't say I've had anything like this with this engine

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by Alexander <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3853' width='330' height='300' border=0 style='border:none;'> on February 18, 2015, 4:07 pm, in reply to "Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"

Thank you Nick.
I'll check if there is a MAP sensor on this car, but today I've made the next test: I've connected monometer into the fuel line just before pressure regulator on the fuel rail. Then I've regestered decreasing of a fuel pressure from 55 to 45 PSI while accelerating. Then I've blocked the line just behind regulator and made a test drive on the 1st gear. Car ran better, but presure dropped heavily from 57 to 25 PSI during accelerating. So I conclude fuel pump is faulty.
Tomorrow I'll check it.

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by Peter Keverne <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT2835' width='330' height='300' border=0 style='border:none;'> on February 18, 2015, 4:27 pm, in reply to "Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"
Peter Keverne

Alexander
I wonder if it would be worth putting a scope on pump to see how it reacts when being driven?

peter

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by Peter Mutlow <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1569' width='330' height='300' border=0 style='border:none;'> on February 18, 2015, 6:21 pm, in reply to "Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"
Peter Mutlow

......and don't forget to check the fuel filter. Change anyway..

Regards

Pete M

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by Alexander Dmitriev <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3853' width='330' height='300' border=0 style='border:none;'> on February 18, 2015, 6:57 pm, in reply to "Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"

Peter, do you mean that observing dropping of pressure while accelerating on neutral gear was enough to state that pump is out of order? I decided to load engine to be sure...

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by Alexander Dmitriev <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3853' width='330' height='300' border=0 style='border:none;'> on February 18, 2015, 7:07 pm, in reply to "Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"

Peter, this is for sure, thank you! I know that sometimes a mesh on the pump can be clogged and be the cause of pump's low performance. But even in this case it's better to replace a pump because it can be damaged due to working without proper fuel flow.

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by Peter Keverne <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT2835' width='330' height='300' border=0 style='border:none;'> on February 19, 2015, 10:53 am, in reply to "Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"
Peter Keverne

Alexander
understand that, it was to suggest a very quick non intrusive test to check on performance of pump

taken from James Dillon's book of Oscilloscope Diagnostics.
I'm sure if not allowed to post waveform Peter will remove it

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by Alexander Dmitriev <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3853' width='330' height='300' border=0 style='border:none;'> on February 27, 2015, 6:45 pm, in reply to "Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"

Changing the fuel pump with it's mesh filter (it'was really clogged) and external fuel filter gave no result... Engine is still works as it has misfires while accelerating. I've checked fuel injectors for leakage or being clogged but they flow is equal.
I've just think maybe pressure regulator is faulty and has some leakage...

PS: Today I've found out from vehicle's owner that this faulty work began after he drove very fast (up to 180km/h (if it's possible)) on the 4th (not 5th) gear. But even this fact gives me no idea...

Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM

Posted by andrew pethig <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3731' width='330' height='300' border=0 style='border:none;'> on February 27, 2015, 9:55 pm, in reply to "Re: Ford / Turneo Connect 1.8L Petrol - engine loses power below 3000RPM"
Andrew Pethig

have you scanned this vehicle for fault codes ?

if you say you have misfires the pcm should give you a code,

things to think about, what condition are the plugs in ?

is the engine timing off?

is the coil pack bad, this is very common on a ford, do you have a test light ? connect it to battery negative and while the engine is running pull off the plug lead from the coil while holding the tip of the test light just below the boot of the lead.

you should have a nice big spark that will jump out off the coil tower for about 2 cms, minium to the test light do this for every lead.

the spark should look like lightning.

if you get a poor spark from the coil thats your problem, we change about one of thease coils a week on fords

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