OK from my understanding your basically get pipe vibration when your lightly on the pedal. I get that when I am lightly on the throttle every now and again. It happens for like half a second to a second. Its almost like there isnt enough boost going through the pipework because too little throttle is being pressed? I think thats normal unless it isnt? Car never had any sort of power issues at all or hesitation unless its been really really hot.
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Light Throttle Hesitation?
- Thread starter ChrisGTL
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- hesitation light throttle
Sounds to me like EGR, like muddy said at the start of the thread. I had a similar thing with my 110 when i got it. You have a 150 from memory which has the seperate N75 and N18 valves on the back firewall, swap them over and see how it goes....
Yeh, I was supposed to do that this weekend, but I had lazyitus.
Took the car out on Saturday, and I must say its running bloody lovely on full throttle, feels really quick at the mo, and since doing the ECU reset my MPG recovers much quicker after a good boot.
Shall swap the N18 and N75 over, just wish I had the nack of getting my EGR off too, I might just book it into garage for it doing - I need a bigger variety of tools!!
bigbrutha
Guest
I had this on my Leon, had a look and one of the boost hoses was half out, had a golf TDI 150 and the same thing happened, but quite jerky.
Reet, I have limp mode at last............
Car has been jerking quite bad last couple of days, and when I start it up a nice carbon spray comes out of my exhaust and stains the paving blocks.
Took laptop out tonight for logging. As i'm flooring it in 3rd I get a huge hesitation and limp mode.
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00 - -
Limped it to a lay-by and restarted, car goes like the clappers again and the smoke when booting it has died right down back to normal again.
Got a log to post too, if I can get my file sharing to work again. lol
Car has been jerking quite bad last couple of days, and when I start it up a nice carbon spray comes out of my exhaust and stains the paving blocks.
Took laptop out tonight for logging. As i'm flooring it in 3rd I get a huge hesitation and limp mode.
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00 - -
Limped it to a lay-by and restarted, car goes like the clappers again and the smoke when booting it has died right down back to normal again.
Got a log to post too, if I can get my file sharing to work again. lol
Code:
Group A: 003
Engine speed MAF (specified) MAF (actual) EGR duty cycle
TIME 790-870 230-350 210-370 40-75%
MARKER STAMP /min mg/R mg/R %
0.94 1533 460 220.5 60.2
1.76 1554 850 823.2 4.8
2.58 1743 850 1234.8 4.8
3.38 1995 850 1249.5 4.8
4.17 2268 850 1249.5 4.8
4.97 2520 850 1249.5 4.8
5.77 2730 850 1249.5 4.8
6.58 2940 850 1249.5 4.8
7.38 3108 850 1195.6 4.8
8.17 3255 850 1127 4.8
8.97 3402 850 1048.6 4.8
9.77 3528 850 1019.2 4.8
10.57 3633 850 965.3 4.8
11.39 3738 850 965.3 4.8
12.21 3801 850 906.5 4.8
13.04 3843 850 926.1 4.8
13.85 3927 850 901.6 4.8
14.65 3948 850 935.9 4.8
15.44 3969 850 945.7 4.8
16.24 4032 850 906.5 4.8
17.04 4074 850 891.8 4.8
17.84 4116 850 886.9 4.8
18.67 4095 850 886.9 4.8
19.49 3969 850 837.9 4.8
20.32 3780 850 406.7 4.8
21.13 3612 820 352.8 4.8
21.92 3465 445 352.8 4.8
22.72 3339 340 367.5 4.8
23.52 3192 325 372.4 4.8
24.32 3066 315 377.3 4.8
25.13 2919 305 387.1 4.8
25.93 2793 295 396.9 4.8
26.73 2667 280 406.7 4.8
27.53 2541 270 401.8 4.8
28.35 2415 260 401.8 4.8
29.18 2289 250 401.8 4.8
29.99 2163 240 401.8 4.8
30.79 2058 230 401.8 4.8
31.6 1932 230 401.8 4.8
32.4 1827 230 406.7 4.8
33.19 1722 230 401.8 4.8
33.99 1596 235 411.6 4.8
34.79 1491 245 401.8 4.8
35.59 1092 250 445.9 4.8
36.39 819 250 328.3 68.5
37.19 1722 230 318.5 69.7
37.99 1743 230 289.1 78.9
38.79 1638 340 298.9 80.5
39.59 1596 365 303.8 62.2
40.39 1596 390 347.9 55.4
41.19 1617 390 382.2 54.2
41.99 1617 385 396.9 55.4
42.79 1638 380 387.1 56.6
43.59 1659 445 392 52.6
44.39 1743 540 445.9 31.5
45.19 1890 830 470.4 4.8
45.99 2037 850 475.3 4.8
46.78 2163 850 480.2 4.8
47.58 2310 850 475.3 4.8
48.38 2436 850 490 4.8
49.19 2562 850 499.8 4.8
49.99 2688 850 504.7 4.8
50.79 2814 850 509.6 4.8
51.59 2730 295 426.3 4.8
52.39 1764 725 455.7 4.8
53.17 1806 770 465.5 4.8
53.97 1848 685 485.1 19.9
54.78 1869 545 465.5 19.9
55.59 1890 420 470.4 26.3
Code:
Group B: 011
Engine speed Spec. intake press. Actual intake press. D.cycle MAP
TIME 2850-3150 2300-2600 2200-2800 35-80%
STAMP /min %
0.53 1512 1044 1128 31.1
1.34 1512 1872 1152 29.1
2.18 1638 2256 1752 39.4
2.97 1848 2496 2592 59.8
3.77 2121 2628 2988 68.5
4.57 2394 2676 2988 73.3
5.37 2646 2688 2988 78.1
6.17 2856 2688 2988 83.7
6.97 3024 2688 2988 88.5
7.77 3192 2688 2988 92.8
8.57 3318 2688 2988 94.4
9.37 3444 2688 2988 94.4
10.16 3570 2688 2988 94.4
10.97 3654 2688 2988 94.4
11.81 3759 2688 2988 94
12.62 3801 2688 2988 94.4
13.44 3885 2676 2988 94.4
14.25 3927 2664 2988 94.4
15.05 3990 2652 2988 94.4
15.84 4032 2640 2988 94.4
16.64 4032 2640 2988 94
17.44 4095 2616 2988 94
18.24 4095 2616 2988 93.6
19.08 4011 2652 2988 92.4
19.9 3864 1092 2076 92.4
20.72 3696 1080 1116 92.4
21.52 3549 1068 972 92.4
22.32 3402 1068 960 92.4
23.12 3255 1056 960 92.4
23.92 3129 1044 960 92.4
24.73 2982 1044 948 92.4
25.53 2856 1032 948 92.4
26.33 2730 1020 960 92.4
27.13 2604 1020 960 92.4
27.95 2478 1008 960 92.4
28.76 2352 1008 960 92.4
29.58 2226 1008 972 92.4
30.39 2100 996 972 92.4
31.19 1995 996 984 92.4
31.99 1890 996 984 92.4
32.79 1764 996 984 92.4
33.59 1659 996 984 92.4
34.39 1554 996 972 92.4
35.19 1428 996 984 92.4
35.99 798 1044 996 92.4
36.79 1176 1068 972 92.4
37.59 1785 1104 972 92.4
38.39 1680 1152 984 92.4
39.19 1596 1308 984 92.4
39.99 1596 1356 984 92.4
40.79 1596 1368 996 92.4
41.59 1617 1368 996 92.4
42.39 1638 1356 996 92.4
43.19 1638 1392 996 92.4
43.99 1701 1536 1008 92.4
44.79 1806 1692 1044 92.4
45.59 1953 2568 1080 92.4
46.38 2100 2616 1104 92.4
47.18 2247 2664 1104 92.4
47.98 2373 2676 1104 92.4
48.78 2499 2688 1116 92.4
49.59 2625 2688 1128 92.4
50.39 2751 2688 1128 92.4
51.19 2898 1044 1128 92.4
51.99 1659 1644 1044 92.4
52.79 1785 2040 1080 92.4
53.57 1827 1980 1092 92.4
54.38 1869 1692 1104 92.4
55.17 1890 1620 1092 92.4
Can't believe component failing at your mileage Chris
Your logs are a bit beyond me but would suggest one or 'tother mentioned.
Your logs are a bit beyond me but would suggest one or 'tother mentioned.
As you might expect from the "positive deviation" fault, your boost looks way too high - 2988mbar means you're nearly at 2 bar boost (once you subtract atmospheric pressure).
And then it stays there....
Sticking VNT mechanism is likely...
Can't remember what car you've got - do you have a separate N75 ?
And then it stays there....
Sticking VNT mechanism is likely...
Can't remember what car you've got - do you have a separate N75 ?
Yeh I have the seperate N75. Are they easy to swap over? I've read lots about people braking the N75 as they try to pull the lines off.
Can't believe component failing at your mileage Chris
Your logs are a bit beyond me but would suggest one or 'tother mentioned.
I know, I don't have much luck with cars me.
I wrote off my 1st MKII Golf, my 2nd MKII golf had major carb problems, my 3rd car a pug of two years old had a disagreement with the gearbox, my 4th car a focus had a piston ring that was stuck closed.
Now my Leon is boosting all over the place.
Just rung SEAT - He says I need a ECU flash.
Asked him if that would delete my remap and he said it would, I take it that is just like a IT guy saying reboot whenever a PC has a problem.
Warranty has run out too, and the guy that has helped me out over there has left SEAT, so its down to me to try fix this as cheaply as possible.
Humbugs!
Asked him if that would delete my remap and he said it would, I take it that is just like a IT guy saying reboot whenever a PC has a problem.
Warranty has run out too, and the guy that has helped me out over there has left SEAT, so its down to me to try fix this as cheaply as possible.
Humbugs!
Can you go into any more detail with this?
VCDS? Can I only see the VNT exercise from underneath?
N75 is very easy to change Chris. Just 3 hole clips and an electrical plug.
I realy cant see a ECU flash doing anything mate. Its just the dealers way of trying to con more money out of you. Once they have re-flashed the ECU and the problem is still there they wont give you your money back will they!!
If it is something to do with the map I would speak to Will at P-torque. I'm sure he can give you some advice.
I had a very similar problem not long ago. I changed oil & filter (I know this wonte of done anything to help the problem), new DV, new plugs and a new coil pack.
I had a coil pack pop the same night I fitted the new dv (2 days before Awsome). Since then I have not had the problem come back.
Here is the thread with my problem clicky.
I realy cant see a ECU flash doing anything mate. Its just the dealers way of trying to con more money out of you. Once they have re-flashed the ECU and the problem is still there they wont give you your money back will they!!
If it is something to do with the map I would speak to Will at P-torque. I'm sure he can give you some advice.
I had a very similar problem not long ago. I changed oil & filter (I know this wonte of done anything to help the problem), new DV, new plugs and a new coil pack.
I had a coil pack pop the same night I fitted the new dv (2 days before Awsome). Since then I have not had the problem come back.
Here is the thread with my problem clicky.
Cheers all.
I'm making a little list of possibilities:-
N75
VNT
N18
EGR
MAP
Vacume hoses going to/from the N18/N75.
I'm making a little list of possibilities:-
N75
VNT
N18
EGR
MAP
Vacume hoses going to/from the N18/N75.
Just been for a quick snoop under the bonnet in the dark.
Should I have a vacume from the black hose that goes to top of EGR on tickover?
Cos I don't have any vacume, and I can't remember if i ever did?
Should I have a vacume from the black hose that goes to top of EGR on tickover?
Cos I don't have any vacume, and I can't remember if i ever did?
I unclamped the EGR about 2 months ago, never clamped it back up again.
Chris, when you installed your SFS piping kit did you keep the vacuum chamber?
Yeh Maz, my vacuum chamber is located where yours is - I checked this last night too to see if it was holding vacuum and it is.
I'm going out now to try take my EGR off again. Hopefuly will get it all off this time and shall clean in.
Then I'm planning on getting car up on ramps, and doing the N75 exercise, see if that shows me anything.
Then I'm planning on swapping over N18/N75.
Im struggling to get 40MPG now, before I could really tickle the car round and I could push 43-44MPG.
Thing that I dont understand is if I boot my car everywhere (like its stolen style then I get low 30 MPG, if I tickle the car everywhere I get 38MPG, and I just can't believe there is only 8MPG of difference between the 2 driving styles.
Finally managed to get the EGR off completely, took me a good 3hrs.
Inside is completely cacked up with crap, not sure if the actual EGR mechanism is supposed to be so hard to move? I can't see any vacume moving my EGR, I couldnt get it to move by sucking it, unlike the ASV which moves easily by sucking on it.
Anyhow, i've fecked the rubber seal on the EGR when removing it, so need a new one of them and lost 2 bolts that never dropped through to the undertray.
Looks like a rescue job for me Monday, i'm never going to attempt taking the EGR off ever again, i'd rather pay someone £100 to do it.
Inside is completely cacked up with crap, not sure if the actual EGR mechanism is supposed to be so hard to move? I can't see any vacume moving my EGR, I couldnt get it to move by sucking it, unlike the ASV which moves easily by sucking on it.
Anyhow, i've fecked the rubber seal on the EGR when removing it, so need a new one of them and lost 2 bolts that never dropped through to the undertray.
Looks like a rescue job for me Monday, i'm never going to attempt taking the EGR off ever again, i'd rather pay someone £100 to do it.
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