Remember to check the MAF at WOT so that the EGR is off/at minimum duty cycle.

A faulty EGR could be the source of your problems. At WOT, is the MAF actual greater or less than the MAF requested?

At wot the actual is way less than requested.So if I vcds vagcom it at high revs the actual is half of requested it is the same at low revs.I will attach the data if you have exceln to read it.Thanks

Group A: '003 Group B:

Engine speed MAF (specified) MAF (actual) EGR duty cycle

TIME 861-945 240-340 240-340 Apr-84 TIME

STAMP /min mg/str mg/str % STAMP

0.34 903 290 260 80.9

0.7 903 285 305 80.9

1.06 903 290 310 80.9

1.42 903 285 240 81.3

1.77 903 290 285 81.7

2.14 903 285 300 78.9

2.53 903 290 285 78.9

2.92 903 290 285 79.3

3.31 903 290 240 78.9

3.7 903 295 255 79.7

4.09 1281 410 440 71.3

4.47 1785 470 380 43

4.82 1890 570 370 19.9

5.17 1827 640 395 19.9

5.56 1701 660 435 4.8

5.95 1638 690 430 4.8

6.34 1428 785 475 4.8

6.73 1428 835 470 4.8

7.11 1680 800 465 4.8

7.5 1890 795 420 4.8

7.88 2037 790 385 4.8

8.24 2163 795 360 4.8

8.61 2247 800 350 4.8

9 2184 260 330 19.9

9.4 1932 720 405 19.9

9.79 1407 845 475 4.8

10.18 1512 795 480 4.8

10.56 1638 790 455 4.8

10.95 1680 790 445 4.8

11.35 1806 790 430 4.8

11.74 1848 790 420 4.8

12.13 1932 790 420 4.8

12.51 1974 785 400 4.8

12.91 2058 790 390 4.8

13.3 2100 790 375 4.8

13.69 2142 790 360 4.8

14.08 2184 795 365 4.8

14.47 2205 795 355 4.8

Column 2 revs 3 requested MAF 4 Actual MAF 5 EGR

right so did you check the earth wires?

could be a few other things ..

1) the maf reading is correct and your engine just isnt drawing the air thru it

2) wiring problem from the MAF

..

ok have you checked the boost level?

if so and its low it could be egr stuck open or the egr flap valve sticking and restricting the air.

exhaust blocked, if it cant get it out it ain't gonna suck it in

compressor wheel missing off the turbo!!!

Day off today Sunday.Will do checks as you have listed.I live near Longbridge/Halesowen so 40 miles from Ludlow.If you are a mechanic/garage would you be interested in trying to sort out,I am off on holiday next Sunday till the following Sunday so could drop off next Saturday and leave it with yoy for the week?Simon Eccleshall 07835 888267 or 0121 4537440 Thanks for help

When I had the new diesel pump fitted the mechanic said the EGR valve was full of soot/gunge and he took it of and cleaned it out,perhaps the intake manifold is badly bunged up?The car has done 190k miles 100K on veg oil and used filterd veg oil(engine still sounds good)with regular oil/filter changes.

Check all the brown wires cleaned with wire brush(un bolted cleaned both terminal sides).Looked at the flap before the EGT valve and it has a small amount of soot(a light dusting)I did notice the flap when running is not horizontal but angled down?Anyway still no acceleration with MAF connected,dissconect and it goes quite well but still slows down going up a hill?

the flap should be horizontal otherwise the boost will try to close it off when its under load.. could be the fault ,I would try and hold it open with a cable tie around the linkage and try again.

I think it may be the turbo nackered,Before loss of power the car was flying after cleaning the AGR flap and inside the housing,it stopped going well a few days later and I found the pipe had broken off the wastegate actuator so may have over boosted and blown a fan vane?1.9TDi AGR engine

Have you actually measured the boost with vcds? block 10 or 11 I think give requested V actual.

Think I have a turbo for a 90 bhp motor here still if it comes to that.

Day off today Sunday.Will do checks as you have listed.I live near Longbridge/Halesowen so 40 miles from Ludlow.If you are a mechanic/garage would you be interested in trying to sort out,I am off on holiday next Sunday till the following Sunday so could drop off next Saturday and leave it with yoy for the week?Simon Eccleshall 07835 888267 or 0121 4537440 Thanks for help

I'm away myself over the weekend so no good but if you can get it to me after you are back I'll gladly sort it for you (and cheaper than most too)

Ok testing Saturday as not going to Tennerife as Thompons say our hotel has been over booked so are refunding so I have all week to try and sort out.Thanks Simon

Will test Saturday as not going away have al week off to sort.Thanks Simon

I have adjusted the flap inside the air intake/AGR body so the flap is level but no difference.I am off all week as holiday cancelled if you have anytime I can gladly bring it too you and you can give me a cost?I am thinking the turbo is no good as it cant suck the air in?My VCDS not working today need to reload software.Thanks Simon text me your number and I can call you?07835 888267

I give up.Anyone know who can remove then fit a new turbo?

hi mate if you can get it here I will check it out for you and if you can leave it with me fit another turbo if thats what it needs.

I am still off Saturday Sunday Monday Tuesday could bring ti down Saturday or Sunday if you can look at it?Will try and call you now.Thanks

Thanks Jim for taking a look.Turbo confirmed dead and leaking crankshaft oil seal.It may be the end for this car?

Thanks Jim for taking a look.Turbo confirmed dead and leaking crankshaft oil seal.It may be the end for this car?

after putting alot of new pieces and became almost a mechanic... it cannot be the end of this car get a refurbished turbo an go on... mine has 389000 km, and after a 109 relay and a maf change is good as new... i did not change the oil for the last 30000 km tough (i swer i will soon )...

Yes Yes Yes,after a long chase via Ebay I have in my possesion a brand new Garrett Turbo for an AGR engine I paid £140 yes a new one,so I will be contacting my local garage in the morning and emailing other contacts for a fitting price and leave the oil leak till a new clutch is needed?Thanks aurelrica for support the Octy will live on i need it to pass the 200,000 miles to complete my 5 year challenge.

I have removed the veg oil kit and put it on the new Octavia so I will probably design my own veg conversion for the old one as I have most of the parts+600 litres of used veg oil ready to go 55p per litre.

Happy Xmas New Turbo Fitted and guess what still the same no power?Same as before,no difference.ooopps Back to the drawing board.

Happy Xmas New Turbo Fitted and guess what still the same no power?Same as before,no difference.ooopps Back to the drawing board.

mine had no power or stared the boost when she wanted because of the MAF sensor, after cleaning with a spray it comme back to normal power... i've notticed that the vacum is produced by a somme kind of pump on the top of the engine that provides the servo brake system too, and by the way i've took out the egr tube from the last actuator and closed and took out a tube from the top of the angine since i have the intercooler full of crap...

if you're car runs bad with the maf in place might be an ecu problem, mine use to go better withot the maf untill cleaning, then it runs better and having the boost as always... try a maf cleaning spray with you're original maf... also see if you're turbo pressure sensor is working whell...

Done the MAF problem I now I am the proud owner of 1 used Bosch MAF and 2 new MAFs off ebay non have made any difference.Next train of thought was blocked catalytic converter but just disconnected waste down pipe and Turbo spins great but still no power same as before.The saga continues ......

Have you done any logging - sorry this thread has been going on so long I can't remember!

MAP actual vs requested might be a good place to start.

Need a local Skoda mechanic to sort it anyone know one?