2003 Clio P0170

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Re: 2003 Clio P0170

Postby mteste03 » Sun Mar 17, 2013 7:18 pm

and all exhaust from cylinder head to post lambda section?
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Re: 2003 Clio P0170

Postby nenenaiad » Sun Mar 17, 2013 10:43 pm

Hi All.

This is image of the WOT test - gamma for those who would like to refer to it.

IMPORTANT

I note that it does not show the right hand red ruler line.If you right click on the image and the select open image in new tab
and then choose the newly opened tab at the top, you will see all of the image.

Image
Regards

Dave
Last edited by nenenaiad on Thu Mar 21, 2013 10:59 am, edited 7 times in total.
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Re: 2003 Clio P0170

Postby nenenaiad » Tue Mar 19, 2013 6:58 pm

Hi,

The following are the figures requested when using the scanner at different revs. The car was at normal temperature.

I have given a few of the readings of SHRTFT1%.



SHRTFT 1%-----------------------------------------------------LONGFT1%

IDLE. 7.8. -1.6 3.9 14.8 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~. -57(minus)


2K. -26 -18.8 -21.1 -14.1~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -14.8(minus)


3K. 25.8 11.7 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~. -27.3(minus)


4K. 11.7 19.5 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -50.8(minus)



BACK TO 0.8 -7 3.1.-7 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~. -100(minus)
IDLE


Regards


Dave
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Re: 2003 Clio P0170

Postby nenenaiad » Thu Mar 21, 2013 11:11 am

Update

@. Fuel Pressure is 3.6 bar and does not fluctuate under throttle

@. Can find no problem or leaks on exhaust

@. Have swapped lambda sensors over since they are the same type and am monitoring.

@. Long term trims appear negative although short term trims seem largely positive when viewed from the scanner.
Doesn't a negative long term trim mean that the baseline pulse width should be made smaller to make the system leaner ?

What do you think ?

Regards


Dave
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Re: 2003 Clio P0170

Postby KimAndersen » Thu Mar 21, 2013 1:16 pm

Hi Dave

The fuel pressure at 3.6 bar sounds good.

Do you still have the P0170 trouble code ?

Did you also check the function of the fuel pressure regulator ?

Have you measured the pulse width on the fuel injectors with your picoscope ?

The LTFT affects the basic fuel duration of injectors and when the LTFT are negative it subtract x number of milliseconds from the base injection width.

You should look at areas that make the engine runs on a rich mixture. :wink:

Kim
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Re: 2003 Clio P0170

Postby nenenaiad » Thu Mar 21, 2013 1:38 pm

Hi Kim,

Thanks for your reply

The fuel pressure at 3.6 bar sounds good.
[i] Yes I think it is to spec [/i]

Do you still have the P0170 trouble code ?
[i]No not at the moment- Have scanner connected waiting to be triggered by event - Am logging numbers at my journeys endj[/i]

Did you also check the function of the fuel pressure regulator ?
[i]Only from the point of view of snapping the throttle and observing - should I do more ?[/i]

Have you measured the pulse width on the fuel injectors with your picoscope ?
[i]I had decided to measure lambda and pulse width - to see what was happening[/i]

The LTFT affects the basic fuel duration of injectors and when the LTFT are negative it subtract x number of milliseconds from the base injection width.
[i]You have confirmed what I thought[/i]

You should look at areas that make the engine runs on a rich mixture.
[i]Shall redo smoke test[/i]


Will keep you informed, and thank you it helps.


Dave
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