Lexia Screenshots

[xantiagreen]

Trainman (Steve) kindly allowed me to pop round and have the xantia checked over on his lexia, we found one or two issues. I'm back at Steve's tomorrow with the 3 MAF's my original, a donor and a new one to check whether it's definitely the MAF or possibly the MAF connections. I keep thinking it maybe that the EGR is choked up (but I've still got the power through each gear), these are the screenshots below Steve sent across,

Looking at the 3rd screenshot it says the engine speed is 161rpm at idle is that right and EDC15C2/P1404 as EGR fault?







What does a global test do?

Cheers

[Hell Razor5543]

I don't know the answer to most of your questions, but a global test checks all the ECUs for faults, etcetera.

[xantiagreen]

I don't know the answer to most of your questions, but a global test checks all the ECUs for faults, etcetera.

Cheers James, I'll be kindly asking Trainman to run a Global, I'm trying to find online what the values should be on a xantia 110 hdi so I can compare, CitroJim passed over some info on the MAF output at idle which should be around 500 units mine shows 205, that's 300 units being syphoned off to god knows where, there's no splits or leaks from the air filter housing up to the MAF, so it must be a faulty MAF, but what's a mystery is that I have no smoking issues now, idle and pick up from various speeds is smooth with no hesitation.

[citroenxm]

That fault there indicates heater plug failiure .. which was recorded when you were turning the engine over on the starter hence 161rpm before she has fired... it will have completely nothing to do with power loss what so ever .. and simply aids starting and if she starts fine id not worry about it in the slightest. . I never ever fitted heaters to my hdi in 150k miles of owner ship.

egrs are completely mechanical on the 2.0s and not ecu monitored and therefore wont be picked up by the ecu or fault recorded.

[citronut]

why is there such a difference in the "injector flow correction" over all 4 injectors ????

is this any use

http://www.bba-reman.com/content.aspx?c ... 404_CLOSED" onclick="window.open(this.href);return false;

[MikeT]

Does this help? From http://www.frenchcarforum.co.uk/forum/v ... =3&t=38139" onclick="window.open(this.href);return false;

270 mg/cp @ idle is about right for a 2.0lite engine if the EGR system is working correctly, on the other you tested car has the EGR valve been disabled/blanked off ?
If you have the engine at idle (and warm) you should get around 240 - 290 ish mg/cp, if you pull the vac pipe off the EGR valve when its running you should see the airflow jump up to about 500 mg/cp.

[Chlorate]

egrs are completely mechanical on the 2.0s and not ecu monitored and therefore wont be picked up by the ecu or fault recorded.

They are and they aren't...

They're vacuum actuated but controlled by the ECU via an electrovalve whether they should open or shut.
The only thing the ECU will pick up is whether the electrovalve is faulty (i.e. whether it's open or short circuited), so you can completely disconnect the EGR from the vacuum circuit and the ECU won't care so long as the electrovalve is still plugged in and working.

[CitroJim]

The reason the engine speed is noted as 161rpm is that was the speed of it when the fault was logged. Most likely when cranking...

An HDi will start happily right down ti silly temperature with no glowplugs but it will run a bit lumpishly.. HDi glowplugs only assist in stating at real brass monkey temperatures but they do post-heat and assist in smooth cold engine running eve when the ambient temperature is fairly balmy...


Did the measured airflow move up in a linear fashion when the engine was revved toward 4000rpm?

[wheeler]

That EGR reading at idle speed looks fine to me, a reading of 500mg/cp at idle would suggest the EGR system is stuck closed or been blanked off. As said in that quote from another thread the reading at idle on a warmed up 2.0 HDi engine should be in the 200ish range, if you pull the vac pipe off the EGR valve with the engine running the reading should jump up to around 500mg/cp.

[Trainman]

Faz has been round again today and we've had a play, He brought his original MAF which we which into the car, this showed the air flow around 500 and increased to around 648 as the engine was rev'd but then started declining the more the engine was rev'd and then settled back at the 200 mark..... We then replaced the the MAF with a brand new one, ran a new test and this showed the brand new MAF at 200 as well, however, when rev'd it increased to 748 before going back down again......

I've given Faz some more screen shots which he will no doubt post later..

[CitroJim]

aWe then replaced the the MAF with a brand new one, ran a new test and this showed the brand new MAF at 200 as well, however, when rev'd it increased to 748 before going back down again......

That's what I'd expect from a good one and the first one certainly looks a bit iffy...

[xantiagreen]

why is there such a difference in the "injector flow correction" over all 4 injectors ????

is this any use

http://www.bba-reman.com/content.aspx?c ... 404_CLOSED" onclick="window.open(this.href);return false;

No idea Malcolm, all I know is that since blasting the MAF's with carb cleaner the xantia seems to have added on a few BHP, mpg is the same if not slightly better, never had problem with cold starting or engine cranking and not firing up, is weird that first one looks normal but other 3 are in the minus
(could it be the ECU is using just one injector to keep car ticking over as it's just sat idling).

Cheers Malcolm

[xantiagreen]

That fault there indicates heater plug failiure .. which was recorded when you were turning the engine over on the starter hence 161rpm before she has fired... it will have completely nothing to do with power loss what so ever .. and simply aids starting and if she starts fine id not worry about it in the slightest. . I never ever fitted heaters to my hdi in 150k miles of owner ship.

egrs are completely mechanical on the 2.0s and not ecu monitored and therefore wont be picked up by the ecu or fault recorded.

Will have the EGR checked over whilst the mechanics doing the front end drop links, bushes etc..

[xantiagreen]

New Screenshots, the clutch signal switch fault I've searched online and comes is either a faulty switch but more than likely a sticky spring that doesn't let the clutch pedal rise top to disengage the switch (so ECU reads as permanent fault). Will have that looked at and replaced/repaired if its cost effective, nothing to worry about though Is it chaps.

Flow meter fault is now faulty circuit, so I'm thinking if all 3 mafs were working fine and letting in the correct amount of air and fuel is it the readouts that are wrong because of a faulty circuit, me and Steve jiggled the cable thinking their might be a loose wire cut open the loom and all clean no splits.

Is the battery reading on the first 3 pics of this post ok at 8.9v at idle, I also had the melted positive cable issue, cable was snipped at the end 2-3 inches, cleaned and soldered the end and into clamp, never had any problems since that was a year ago,

[xantiagreen]

Phew