Running / Idling Issues???

[A.m.C_Ibiza1]

Slight problem with my ibiza, seems to be getting a bit worse, basicly when driving its fine but when i come to a stop the engine drops to idle and then it seems to be missing / running very lumpy, i have noticed that it happens more when im on the brakes and i have got an ABS fault .. could it be related??

My first thought was MAF but it was replaced a couple of thousand miles ago, got a VAG COM run of it anyway just incase it might be faulty, does this look ok? (not a straight run, was around town!)

15.68 903 850 460
16.86 903 850 480
18.06 1491 850 525
19.25 1365 850 545
20.43 945 850 475
21.62 903 850 465
22.81 903 850 460
23.97 903 850 460
25.15 882 850 480
26.34 903 850 460
27.53 903 850 465
28.67 1155 850 525
29.85 924 850 470
31.02 1428 850 540
32.21 1344 850 575
33.4 1218 850 555
34.59 1974 850 660
35.75 3003 850 675
36.91 3108 850 560
38.11 2772 850 915
39.29 3339 850 620
40.44 2163 850 525
41.59 2079 850 580
42.77 1974 850 515
43.91 1848 850 510
45.11 1512 850 520
46.26 1029 850 455
47.4 1764 850 550
48.61 1806 850 590
49.81 1848 850 610
50.99 2016 850 720
52.17 2415 850 685
53.34 2520 850 590
54.51 2352 850 525
55.69 2100 850 520
56.88 1911 850 515
58.04 1785 850 535
59.21 1974 850 720

Just to add the car is overdue its service and i had Redex in about 2 tanks ago??

Thanks for looking!!!

 

[ChrisGTL]

Slight problem with my ibiza, seems to be getting a bit worse, basicly when driving its fine but when i come to a stop the engine drops to idle and then it seems to be missing / running very lumpy, i have noticed that it happens more when im on the brakes and i have got an ABS fault .. could it be related??

My first thought was MAF but it was replaced a couple of thousand miles ago, got a VAG COM run of it anyway just incase it might be faulty, does this look ok? (not a straight run, was around town!)

15.68 903 850 460
16.86 903 850 480
18.06 1491 850 525
19.25 1365 850 545
20.43 945 850 475
21.62 903 850 465
22.81 903 850 460
23.97 903 850 460
25.15 882 850 480
26.34 903 850 460
27.53 903 850 465
28.67 1155 850 525
29.85 924 850 470
31.02 1428 850 540
32.21 1344 850 575
33.4 1218 850 555
34.59 1974 850 660
35.75 3003 850 675
36.91 3108 850 560
38.11 2772 850 915
39.29 3339 850 620
40.44 2163 850 525
41.59 2079 850 580
42.77 1974 850 515
43.91 1848 850 510
45.11 1512 850 520
46.26 1029 850 455
47.4 1764 850 550
48.61 1806 850 590
49.81 1848 850 610
50.99 2016 850 720
52.17 2415 850 685
53.34 2520 850 590
54.51 2352 850 525
55.69 2100 850 520
56.88 1911 850 515
58.04 1785 850 535
59.21 1974 850 720

Just to add the car is overdue its service and i had Redex in about 2 tanks ago??

Thanks for looking!!!

Can't you do a proper uphill MAF test by using more revs? 3rd gear uphill pull from 2k to near redline.

 

[A.m.C_Ibiza1]

I didnt get a chance today as i was running around all day! I will do a proper test tomorrow and post the results, what should i expect to see as an actual reading, its supposidly requesting 850 at all times? The car is mapped, bigger turbo / injectors / exhause ect!

I will also hopefully sort out the ABS problem as its getting realy bad now!

 

[ChrisGTL]

I didnt get a chance today as i was running around all day! I will do a proper test tomorrow and post the results, what should i expect to see as an actual reading, its supposidly requesting 850 at all times? The car is mapped, bigger turbo / injectors / exhause ect!

I will also hopefully sort out the ABS problem as its getting realy bad now!

Take the ABS out and reduce some weight

I hate ABS, proper pants..!

My Leon requests 810 at all times, heres my results from a Stage 1 pd150 Leon.

RPM    MAF1      MAF2   MAP1     MAP2
1827	810	656.6	996	1524
1785	810	681.1	996	1512
1806	810	945.7	996	1524
1932	810	1082.9	996	1704
2247	810	1249.5	996	2340
2625	810	1249.5	996	2988
2982	810	1229.9	996	2796
3297	810	1151.5	996	2724
3570	810	1146.6	996	2664
3822	810	1117.2	996	2676
4032	810	1078	996	2652
3822	810	558.6	996	2556
3570	810	543.9	996	1440
3339	810	519.4	996	1344
3108	810	534.1	996	1296
2877	810	558.6	996	1296
2499	810	558.6	996	1308
1974	810	490	996	1296
1512	810	480.2	996	1188
924	810	431.2	996	1128

 

[A.m.C_Ibiza1]

i see the difference! mine doesnt go anywhere near that high so i will give it a good run upto redline tomorrow and see what it says!
Cheerse

 

[ChrisGTL]

i see the difference! mine doesnt go anywhere near that high so i will give it a good run upto redline tomorrow and see what it says!
Cheerse

No problems!!

 

[A.m.C_Ibiza1]

Righty then, just done a run in 3rd gear up to the redline, foot almoast on the floor and this is my results:

RPM Req MAF Act MAF
1890 850 1080
2331 850 1045
2814 850 955
3234 850 995
3654 850 995
4032 850 975
4347 850 955
4620 850 925

Look Good??

 

[M1KEH]

Yeah they look fine. How recently have you had the fuel filter changed?

 

[A.m.C_Ibiza1]

"should" have been done a year ago but im not 100% sure on that, however i used Redex with some tesco fuel a couple of tanks ago and im beggining to think the Redex was VERY old, god knows how long its been st on the shelf! Im going to have a service at the beggining of august but the problems getting worse, when ever i let off the throttle it judders badly (but idle speed remains steady) a blip of the throttle usualy clears it but the more im driving the worse its doing it! Ive just put some millers sport 4 in but itl take a tankfull to get working!

If i was to change the fuel filter myself whats the procedure?? And where does the MK3 Ibiza's filter sit??

Thanks!

 

[ChrisGTL]

Does your car have an EGR?

 

[A.m.C_Ibiza1]

used to have

The valve is still on the car but its completley disconnected and blanked off!

 

[A.m.C_Ibiza1]

Just been for a 50 mile round trip, the juddery idle isnt happening as badly, could the millers started working through already?? Im going to change the fuel filter tomorrow and see if it makes a difference ... if i can find it! Is it a big cylinder type filter with 4 pipes coming off attached to the suspension strut? Do i need to fill it with diesel first and anyideas on price??

 

[sssstew]

Front left with the four pipes :-

http://www.autoviva.org/wp-content/gallery/vw-golf-19-tdi-110hp/vw-golf-19-tdi-110hp_engine.jpg

Dont have to fill with diesel but if you do then make sure its new stuff. If you dont fill you will just have to crank it over a bit more to start.

 

[A.m.C_Ibiza1]

OK; i have changed the filter and its made no difference!

When the engine is cold it runs fine, once it warms up to temp it will start to judder, but only when im slowing down and come of the clutch, as the engine drops to idle it struggles a little but evens itself out within a couple of seconds!

Never has trouble starting and never cuts out, MAF is good and the filter is now brand new...

Any more ideas??

 

[M1KEH]

What air filter are you running? Is it clean?

 

[A.m.C_Ibiza1]

air filter is atandard but ive not checked its clean! Will have a look later at that! Im starting to think it might be a split in a vac hose or somthing!! But air filter is an obvious one i missed thanks!!

 

[A.m.C_Ibiza1]

So anymore ideas guys? I will need to whack the air filter out tomorrow and check it out but i dont think that could do it, as the juddering is so intermittent! Runs fine when cold but judders when warmed up (on idle only!) Realy annoying me now!! Maybe it would be a good idea to start replacing the VAC lines??

 

[sssstew]

there was a big problem with 'slow down shudder' on the old 90 TDIs which they never really fixed, some people on tdi club managed to fix by messing with the injection quantity in vag com. Im thinking it might be worth checking with your mapper to see if its fuel injection quanity is ok.

 

[brad1]

I seem to have a problem like this, not the same, but get a juddery from the engine at 1400rpm. For example, if i use cruise control and set at 1400rpm the car judders slightly and will keep doing it until i increase or decrease the revs slightly. I think this is down to the injection quantity mate. Check with AmD. Mine is going back in soon and they are hopefully going to sort this out too

 

[A.m.C_Ibiza1]

could be Worth checking that out but its never had this problem before, just recently started doing it??