hawkeye favour

gstuart · Mar 21, 2015

hi

was just wondering if anyone who owns a hawkeye and a td4 may be able to do me a big favour plse

within the menu there is a engine roughness test and also a letby test , in the result of mm3

as I wish to compare the findings I've got with mine

also had another thought

I didn't know if it would help that for me to one day sit down with the hawkeye and write out all live data and post it on here so that we could all compare the figures if we need to and then put it up as a sticky

don't know what people think

if there is anyone that may be able to do the engine roughness and letby test I would be extremely grateful plse

thks again

Hippo · Mar 21, 2015

I have filmed a Td4 with me hawkeye since we last spoke about this but not put the video up yet as it's in the queue for editing. Will get round to it up on you tube. Subscribe for free.

The T4e engine roughness displays the revs of the engine on each cylinder. The values are different for each cylinder. There's 4 (because you int got 6

) cylinder measurements. You can watch 2 cylinders at the same time but scroll through to see all of them. Even though the engine is running and at a stable revs, the numbers are slightly different on each cylinder. We could see values on tick over when warm of 772 to 786. All values seemed to be even. When revving the engine when stationary the values climb.

The fact the values are different is a bit of a surprise as you would think they would be the same. The reason for this could be due to the revs changing very slightly between the individual measurements of each cylinder. There must be a finite time between measurements taken buy the engine computer. All 4 cylinders will be moving/firing at the same speed.

When I say cylinder in the above it may be the case the word "injector" should be used. The roughness test isn't something I have seen before. I have to admit there's several items new/updated/fixed in the v7 software. Even for the other engines. I is on the hunt for an L series and 1.8.

Not sure what you mean by "letby" test but there is a Fuel System option which displays values in mm3 (mm cubed I assume). Values are different for each cylinder and when warm on tick over were -1.7 to 0.9. The values were slowly moving about within this range, on each cylinder.

gstuart · Mar 21, 2015

Hippo said:
I have filmed a Td4 with me hawkeye since we last spoke about this but not put the video up yet as it's in the queue for editing. Will get round to it up on you tube. Subscribe for free.

The T4e engine roughness displays the revs of the engine on each cylinder. The values are different for each cylinder. There's 4 (because you int got 6 ) cylinder measurements. You can watch 2 cylinders at the same time but scroll through to see all of them. Even though the engine is running and at a stable revs, the numbers are slightly different on each cylinder. We could see values on tick over when warm of 772 to 786. All values seemed to be even. When revving the engine when stationary the values climb.

The fact the values are different is a bit of a surprise as you would think they would be the same. The reason for this could be due to the revs changing very slightly between the individual measurements of each cylinder. There must be a finite time between measurements taken buy the engine computer. All 4 cylinders will be moving/firing at the same speed.

When I say cylinder in the above it may be the case the word "injector" should be used. The roughness test isn't something I have seen before. I have to admit there's several items new/updated/fixed in the v7 software. Even for the other engines. I is on the hunt for an L series and 1.8.

Not sure what you mean by "letby" test but there is a Fuel System option which displays values in mm3 (mm cubed I assume). Values are different for each cylinder and when warm on tick over were -1.7 to 0.9. The values were slowly moving about within this range, on each cylinder.

cheers mate as always for ur fantastic help

im trying to understand the hawkeye a lot more and what and how to read the results correctly

it will take me time in how to understand it ,

on the engine roughness test I got around 960 on each but also changes on each cylinder

ref the fuel system , I thought it was some like a let by test for the injectors

I got on each cyl mm3

1/ 0.1mm
2/ 0.1mm
3/1.1 mm
4/ 1.9 mm

these reading were on tickover , if u Rev it over 1000 revs they all change to zero

my thoughts were maybe this was the amount of fuel that the injectors are using on tick over and maybe the same as a let by test , but then couldn't understand why it all went to zero when the engine revs are raised

on the high pressure rail is got

28659.1 kpa

man pressure 100.0 kpa

low pressure rail
383. kpa

I assume these reading would change if for example there was a partially blocked fuel filter or failing fuel pump

thks again mate ,I will be sitting down and writing out all the live data and if it's any help put it on here so that we've got comparrisons and then hopefully have a live data sheet for the td4 and others could then add there engines and build up some form of records

appreciate as always the help

td4van · Mar 21, 2015

The values go to zero when the revs go above 1000rpm as the idle control software isn't needed then and hence the values aren't relevant.

They are used to show the relative amount of fuel the engine needs to have to keep the idle steady and should be in an ideal world zero. However there'll always be some extra needed to maintain a steady idle.

Anything with a difference of +/- 5 mm3 should be looked at otherwise not a lot to worry about. However, the caveat is that you can get "good" readings on that screen but have a leaking injector so it's kind of a dual test of the leak off and the injector balance readings to work out what's working correctly.

Engine roughness is basically the same kind of test but can show a lack of compression or other mechanical issues on a cylinder as well.

High pressure and low pressure fuel readings are within spec for a car at idle.

gstuart · Mar 21, 2015

td4van said:
The values go to zero when the revs go above 1000rpm as the idle control software isn't needed then and hence the values aren't relevant.

They are used to show the relative amount of fuel the engine needs to have to keep the idle steady and should be in an ideal world zero. However there'll always be some extra needed to maintain a steady idle.

Anything with a difference of +/- 5 mm3 should be looked at otherwise not a lot to worry about. However, the caveat is that you can get "good" readings on that screen but have a leaking injector so it's kind of a dual test of the leak off and the injector balance readings to work out what's working correctly.

Engine roughness is basically the same kind of test but can show a lack of compression or other mechanical issues on a cylinder as well.

High pressure and low pressure fuel readings are within spec for a car at idle.

cheers mate

im trying to read as much as I can , I've always had the view that I need to understand what the readings are in order it tells me certain results

understand what ur saying with regards to the injectors

have been trying to find a data sheet that shows what the values should read according to the manufactuer as the readings can mean anything without set parameters that they are required to be at

so the mm readings can tell me for example if one injector is using more than another and how they are running as a set of four

I know its a very complicated thing and am mechanically minded but with boilers etc, lol

been searching for ages to find the manufactuers settings but to no avail , as I thought then having such sheet can then compare that and my readings in a comparrison , that's why i maybe thought about compiling one and sharing it here as maybe a sticky for everyone to use

the pressure rail readings could be in anything as it still wouldn't mean a thing to me with looking at a chart and saying yep there ok or not

thks so much again

Hippo · Mar 22, 2015

Don't forget your results will be different to a standard Td4 if you have the synergy fitted. Any other mods effecting the engine will also change the results.

gstuart · Mar 22, 2015

Hippo said:
Don't forget your results will be different to a standard Td4 if you have the synergy fitted. Any other mods effecting the engine will also change the results.

you've got a very good point

I did set the synergy box to off , however it could still have a bearing as u say on the results

recentely had it rechipped and will be fitting the dashboard switch which now has two settings, Eco for max mpg and power

will be interesting to have the hawkeye plugged in whilst altering the dash board switch and see how the figures change

thks mate

Hippo · Mar 22, 2015

You can watch it go bang and tell us the error code.

ound:

gstuart · Mar 22, 2015

hippo said:
you can watch it go bang and tell us the error code. ound:

:hysterically_laughi:hysterically_laughi

hawkeye favour

gstuart

D3 Grandad

Hippo

Lord Hippo

gstuart

D3 Grandad

td4van

Well-Known Member

gstuart

D3 Grandad

Hippo

Lord Hippo

gstuart

D3 Grandad

Hippo

Lord Hippo

gstuart

D3 Grandad

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