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[aaronjb]

Suggest you check the small diameter tube which goes from the underside of the inlet manifold to a pressure sensor (a 1" cube) mounted on the bulkhead .... it's above the dipstick. This get blocked by oil & prevents the turbo from operating effectively thus causing poor acceleration.

Sorry i should of followed this up  will look tomorrow i think thats what im getting at (???the solenoid??)

Well Evo was talking about the MAP sensor hose, there, rather than the EGR solenoid; the MAP sensor hose is connected to the inlet manifold so gets full of all the oil & crap & crud that's in there, while the EGR solenoid is hooked up to the vacuum pump which is clean..

But yeah - worth cleaning out that hose and the EGR valve itself in the inlet manifold.


Which reminds me - Omegatoy; is there a gasket between the EGR and manifold that'll need replacing?  I haven't had mine off yet to check

[Omegatoy]

Suggest you check the small diameter tube which goes from the underside of the inlet manifold to a pressure sensor (a 1" cube) mounted on the bulkhead .... it's above the dipstick. This get blocked by oil & prevents the turbo from operating effectively thus causing poor acceleration.

Sorry i should of followed this up  will look tomorrow i think thats what im getting at (???the solenoid??)

Well Evo was talking about the MAP sensor hose, there, rather than the EGR solenoid; the MAP sensor hose is connected to the inlet manifold so gets full of all the oil & crap & crud that's in there, while the EGR solenoid is hooked up to the vacuum pump which is clean..

But yeah - worth cleaning out that hose and the EGR valve itself in the inlet manifold.


Which reminds me - Omegatoy; is there a gasket between the EGR and manifold that'll need replacing?  I haven't had mine off yet to check

nope!! no gasket in there on either end!!!

[aaronjb]

Excellent, that makes the job a bit easier

[maracus]

  Well the car is REALLY doing my head in now!!! it seems back to its old ways again, i havent done any more investigating yet, been abit busy, but i have made another strange observation... [smiley=cheesy.gif]

it seems very random- one minute its behaving itself, the next its rubbish again; there is a long (metal?) pipe that runs along between the cam cover and the inlet, from the brake servo to top front of the engine. Im guessing from looking, thats a vacuum supply to the brake servo?? This also has a small cylindrical thing (some kind of one way valve??) with two small vacuum pipes running off it one of which goes to the EGR valve solenoid and cant remember for the other one right now, but anyhows the brakes are sometimes very sharp, and sometimes abit, sedate. I'm now going to try to establish any sort of relation between the brakes not working as well, and the running issues its having.

Could i be on to something here, or is just my clueless, adventurous mind just coming up with random rubbish??  [smiley=huh.gif]

just wondered if i've got a problem with whatever generates the vacuum, as this is not an area i have had much to do with to learn anything about.
 :ycheers...

[hoofing it]

If the vac pump your on about fails then the brake pedal will go very hard.
What your describing seems normal.
try replacing all the vac pipes leading off to the solinoid and the one to the egr

[aaronjb]

Pretty sure the little white thing is a filter rather than a one way valve - on a petrol engine it'd be a one way valve, but there is permanent vacuum from the vac pump so I've always assumed it was there to prevent any crap being sucked into the vac pump and scoring the internals..

But yeah - I'd go with that, too.. replace all the vac hose, maybe leave the EGR valve blocked off from the exhaust and block the vac hose that would normally go to it somewhere along it's length and see if the problem stays away when you do that.. Could be a faulty EGR valve intermittently sticking, or even leaking past it's internal diaphragm?

[maracus]

If the vac pump your on about fails then the brake pedal will go very hard.
What your describing seems normal.
try replacing all the vac pipes leading off to the solinoid and the one to the egr

my pedal hasn't gone permanently hard, but last night when i pulled up on the drive way and was shunting around, the pedal did go hard after a few uses in short succession but then returned back to normal, thats what made me pay attention to what the brakes were behaving like. I did wonder if this was normal. :-?

I'm going to go get them vac hose bits off the other car now so they're ready to go on when i get some spare time again, probably tomorrow (depending how long it takes).

will update asap...

[hoofing it]

If the vac pump your on about fails then the brake pedal will go very hard.
What your describing seems normal.
try replacing all the vac pipes leading off to the solinoid and the one to the egr

my pedal hasn't gone permanently hard, but last night when i pulled up on the drive way and was shunting around, the pedal did go hard after a few uses in short succession but then returned back to normal, thats what made me pay attention to what the brakes were behaving like. I did wonder if this was normal. :-?

I'm going to go get them vac hose bits off the other car now so they're ready to go on when i get some spare time again, probably tomorrow (depending how long it takes).

will update asap...

yes the pedal will do that if the engine is idling just give it a gentle rev when shunting about this spins the vac pump faster.
the little white thing aaronjb is talking about is a filter for the egr system.I use a inline filter and change it regular. this will help the egr solinoid breath easier

[aaronjb]

Yeah - I presume that's why on later models the EGR solenoid becomes a two-way valve with a small intake filter on it, as opposed to a sealed system..

[maracus]

well peeps, i had a go at clearing down the pipe that goes to the MAP sensor, but the old throttle cable i used wasn't really wide enough do do a decent job, but resistance could be felt and it pulled a black slime of oily crap. the car just seems to have a mind of its own with what it does, when it does, regardless of what i unplug/remove/do.

 :yThink i'll jot everything down on a piece of paper and systematicly go through it over the weekend and double check everything to try to figure it out. i'll let ya know how it goes...

[aaronjb]

might be worth replacing the vac hoses to things like the MAP & EGR solenoid if you can.. I was planning on doing that to mine this weekend, actually, as I have a buttload of 4mm silicone hose lying around from the other car(s)

[idwal]

car is a 2000 facelift - will the paper clip test
work on later models?

thanks
ken

[hoofing it]

car is a 2000 facelift - will the paper clip test
work on later models?

thanks
ken

paperclip only works on the 2.5 the 2.2dti needs code reader

[maracus]

ok i paperclipped it and all clear. I then done the diesel magic, no change. I have blanked off the EGR, again no change. Nowthen, i went to swap the ECU from the old 'tank' and i noticed the numbers on the label were slightly different and the one i took out said 'TV' and the other said.. something else, cant remember now but about to go look again. I swapped them over and the car refused to start and the light casme on, so i paperclipped the ECU and it came up with; 19, 64, 85, 92. Im now searching for the codes on here (had them the other night, now i cant find them)

 :odid they put a different spec. ECU in estates or something?

[Seth]

The ECU numbers that you're looking for usually end with '427' or '428'.

Lower 30s MPG is about the norm for a manual-boxed TD running locally - proven!
My previous TD Estate constantly achieved 33 mpg around here.
Performance was disappointing, though once chipped, it positively flew!