+- JapCarForum (https://www.japcarforum.com)
+-- Forum: Cars, Cars, Cars! (https://www.japcarforum.com/forumdisplay.php?fid=11)
+--- Forum: Project Cars (https://www.japcarforum.com/forumdisplay.php?fid=156)
+--- Thread: My little project - IS200 Turbo (/showthread.php?tid=1216)
Pages:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
My little project - IS200 Turbo - steviewevie - 28-03-2018
Looking at the e-Manage Ultimate manual, there are two maps related to this (there are loads of different maps that can fine-tune things). You can either set up an "airflow adjustment map", to alter the voltage sent to the ECU for the air. Or you can have an "airflow output map", which is where you remove the factory sensor and have the e-Manage tell the ECU how much air it is seeing. No idea how mine has been setup.
There's also a specific boost limiter cut setting in the e-Manage, to alter where the boost cut comes in. So I'm wondering if this might be where the problem is, and most of the time the boost cut is avoided, but just occasionally I manage to create a situation where the boost cut comes in ?
My little project - IS200 Turbo - John G - 28-03-2018
Just had a good read through, ****** mental mate, cant wait to have a good nosey round yours and a few other memebers cars
My little project - IS200 Turbo - jay@buttonmoon - 28-03-2018
Rabster Do you need both surely updated would replace standard ?
with the my car the std map sensor is used for n/a and the aem map sensor is used for boost.steve must have the same type of set up.
oh can i use this account please
My little project - IS200 Turbo - steviewevie - 29-03-2018
I am going to see a local e-Manage mapper tomorrow afternoon, primarily to see if he can tweak the map to fix the lumpiness I get at very low throttle. I'll also see if he's got any ideas about this "limp mode" problem too.
Going to have a try and see if I can find a way to reproduce the limp mode problem. It seems to have something to do with using a lot of boost along the motorway and then cruising - because those are the circumstances it has come in previously. Obviously if I can reproduce it for the mapper it will be a lot easier to see what's going on.
My little project - IS200 Turbo - LEX11S - 29-03-2018
hi steve i had this prob with car wanting to slow down when you put your foot down did all the same things as you but couldnt find anything? all i could find was that when i turned off the car the throttle body would be making a buzzing sound when i opened the bonnet and put my hand on the arm on the side of the throttle body to try and move it, it was holding its self shut and had to push like hell to try and get it to open, got it open then the buzzing stopped.
My little project - IS200 Turbo - jay@buttonmoon - 30-03-2018
LEX11S hi steve i had this prob with car wanting to slow down when you put your foot down did all the same things as you but couldnt find anything? all i could find was that when i turned off the car the throttle body would be making a buzzing sound when i opened the bonnet and put my hand on the arm on the side of the throttle body to try and move it, it was holding its self shut and had to push like hell to try and get it to open, got it open then the buzzing stopped.
we still dont know what is wrong with oyur car.the problem steve is having is the same problem we had with our spc car and mine,when we fitted the bigger injectors and turned the boost up to 1bar,it would go into limp home when driving we found it was the std map sensor seeing boost when it shouldnt.when my car and the project one was at 240bhp both cars ran fine.
My little project - IS200 Turbo - steviewevie - 30-03-2018
Just spent an interesting couple of hours down the road with Ed at Fusion Motorsport (virtually next door to Surrey Rolling Road), most of it with his laptop plugged into my e-Manage Ultimate.
We did a fair bit of driving round, he checked out my existing map etc. He doesn't think my "limp mode" problem is anything to do with the MAP sensors, because everything looks fine in their maps (airflow map etc). The trouble is, I can't reproduce this problem on demand, as I've said before.
Jay - when you had this problem, which you say was MAP-related, did you get an engine check light and an error code ?
He thought the way the fuelling has been setup is a bit overly complicated. There are various ways of this being done, but I'm guessing Noble went the route they did because they didn't know what size the stock injectors are - because it's possible to enter the "old" and "new" injector values and get the e-Manage to compensate accordingly.
I can easily reproduce the slightly lumpy running at low throttle openings, and he's tried adding a little bit more fuel to see if that helps, so I'll try it and see (difficult to tell at the time given we spent quite a bit of time with it running like that !).
He think this issue (the lumpy running) is due to the stock ECU and the e-Manage fighting each other. Apparently the stock ECU is constantly checking what it's seeing via the stock O2 sensors and altering the fuelling accordingly. The trouble is, I now have bigger injectors, so when the stock ECU compensates it probably does so in too big a chunk at a time.
He doesn't really know what's causing the "limp mode" problem, given I couldn't show him the problem happening. But he's guessing it's also related to the same thing, i.e. the stock ECU trying to take things over and fighting with the e-Manage - so that's why when I stop on the side of the road and start up again (with it seeing different AFR etc) it decides it's happy again.
So where do I go from here ? Well, I will let the car settle down again after the fiddling about today (with it re-learning) and see if the low-down lumpiness seems a bit better.
I can contemplate a re-map using the injector sizing method (if I can either find out the standard injector size, or even get that measured via a flow test), which might help both problems.
Another option to consider if I do get a re-map, is to replace the remaining O2 sensors with O2 simulators. I'm actually not clear if perhaps there's only 1 left now in the manifold rather than the original 2, I need to check that. I'm already going to replace the third O2 sensor (behind the cat) with a simulator anyway, because of the ocassional engine check light from that (previously posted). If I did go down that route, it might be a lot better, because then the stock ECU will not see any variation in AFR because it will just have sensors pretending that everything is constant - therefore the stock ECU won't try and interfere and let the e-Manage run it all itself.
It was interesting to see this in action with the car idling, via the laptop and my AFR gauge (which again, I'm so glad I bought). We could see the AFR via my gauge, Ed could alter the map to chuck a whole load more fuel in, the AFR would indicate rich accordingly, and then over about 10 seconds or so the stock ECU would take the fuel back out again and the AFR would go back to normal !
So I've got a few things to think about.
My little project - IS200 Turbo - toxo - 30-03-2018
steviewevie I can contemplate a re-map using the injector sizing method (if I can either find out the standard injector size, or even get that measured via a flow test), which might help both problems.
210cc at a guess.
My little project - IS200 Turbo - steviewevie - 30-03-2018
toxo 210cc at a guess.
I will dig out my old injectors, see if I can see a part number on them, and try Googling that.
What is your 210cc guess based on ? Not disputing it, just curious ? It sounds about the right ball-park to me.
My little project - IS200 Turbo - Sparkystav - 30-03-2018
sounds like an interesting day mate, hope you make progress