Nettlez
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Posts posted by Nettlez
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Well with the wires swapped and the ignition timing adjusted the problem is gone. I'm just confused now as to why I neded to swap be wires over with a new crank sensor? It's a reluctor type sensor, are they polarity sensitive?
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yep your right, I have no idea how this has happened. could the new crank sensor be different so it switched the polarity?
this is really weird, its like all of a sudden its started reading the other edge of the trigger wheel?
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so I got the car back from the tuner back on the 23rd but as he was finishing the car off he started to get trigger error counting and the engine would reach its 7000rpm limit at about 3000rpm, I managed to drive the car home, got a new crank sensor but still no joy, tried putting a new plug on the loom where it goes to the crank sensor but still no better, it improves if I change the filtering level from 1 to 4. Attached is a scope with the car revving at 3000rpm but the ecu thinking its hit the rpm limit and the map. The scope looks odd on trigger one some how?
heres also a log
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just seen everything I want is under the intercooler spray section :-)
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So the car went to the tuner for the second time with the bigger exhaust and he setup single rpm launch control for me but the wastegate diaphragm ended up melting towards the end, its sandwiched between the manifold and down pipe due to space but I was wondering about using a intercooler water spray type idea to cool the wastegate on demand via a switch in high heat situations like on the Dyno. The wastegate is a Turbosmart hypergate and I cant fit any other because of room, so I cant fit a Tial water cooled one (everything is all ready wrapped in heat wrap too). But I was wondering if there was a way to pulse the pump rather than have it just drown the wastegate when its on? Maybe have it pulsing for one second then off for one then back on and so on? Could this be done maybe via PWM and a solid state relay? Thanks
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Car went to the tuner and he ended up just putting another pressure sensor going to the gauge
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So the car is back from being mapped but I had AEM 30-5132 boost gauge which has an output to go to the ecu, I was using the map sensor which comes with the gauge as my main load sensor but the tuner said the reaction time was too slow so he wire the map sensor directly to the ecu rather than being piggy backed from the boost gauge, consequently now the gauge doesn't work. I asked the tuner when I went to pick the car up and he told me about the problem if I would be able to use an aux out from the ecu to give the gauge its signal and he said yes. So I have wired aux 8 to the wire which I believe was the input to the gauge (green wire) but am insure on how to configure it on the ecu? What do I select the output as? GP PMW? Thanks
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Timing marks can be found here
http://www.msextra.com/forums/viewtopic.php?f=101&t=34345
i lined it up then made marks on the sump and wheel so you can check it with a timing light
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are you using the vanos crank wheel then? Your cam pulse doesn't line up with you missing tooth gap on the crank wheel like mine does, thinking you might have the wrong crank wheel on? Have you zeroed in your ignition timing using a timing light?
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Yes you will probably need to fudge it around a bit to get it right. I was just guessing on the numbers as i dont really know the engine.
You also probably need to alter the idle solenoids dutycycle so it doesnt let to much or to little air by. It is a balancing act this.
You should really try to turn OFF the idle ignition map and get it to idle as good as you can with the main ignition+fuel map and ISC dutycycle first. THEN turn on the idle ignition map as an aid.
The main problem is that when it is hunting it goes in and out of idle state. Switching between your idle ign map and the main ign map. When there is a large difference between them this is what happens. You could also try to lower the numbers in the main ign map that is reached when it hunts to try to stabilise it that way.
Ah right I see. I was just fiddling with the idle and turned the idle ignition on and it went really stable so just used in since then. Now im a little more educated I will try turning it off and seeing if I can get it to idle at 14afr without it. Thanks again
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Deleted the old files now, here's the new ones
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Thanks Steve, just gave it a try and its definitely better, i like what you did with the idle ignition map. Just gave it a try and it was definitely better, although it did end up doing its hunt business after touching the throttle, but managed to get it better by altering the figures in the idle ignition table. I recon this might get me through the mot now, so long as it is just at idle. I altered the fuel map by 0.2 at a time in a block around idle rpm till it was near 14afr then tried the throttle then altered the idle ignition map. I would upload the log and map but it wont let me, says it cant be bigger than 542kb but its only 160kb?
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So to update I have had another go. I did what Adam said but the lowest I could get it to go was 40psi (engine not running), so at tick over its now about 30psi, I adjusted the dead times accordingly. I managed to get it to idle at around 14.5 once it was properly hot but as soon as I touch the accelerator it doesn't want to idle again unless I turn it off and start it again. Have attached the map and log of it doing this. Im thinking it might be to do with timing not catching the revs falling well enough then when it does catch it it over shoots?
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Hi Scott,
Yeah I have had a good look and cant find the info, all I can find is that Summit Racing do a DVD for $250 that has it. So think I will go down the route Adam said later and see how I get on with that, although I am running bosch 044 fuel pump and I'm not sure I will be able to get it as low as 30psi. If that's no good I will post the log with it hunting as you said. I will report back later, Thanks
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What are your injectors? Your pulsewidth at idle is only 1.5ms, most injectors wont behave linear with such a low pulse width. This is why you are getting the hunting effect.
So unless you can get "short pulsewidth adder" info from the injector supplier, then I would suggest in the meantime the easiest fix is to lower your fuel pressure (try around 30psi). You will need to tweak the master fuel again to get it to run but then your idle pulsewidths will be in a region where the injector will work predictably. The tuner can then increase it again later before he starts mapping.
I am running seimens 107-961 injectors. Had a quick Google and can't seem to see this short pulse width added info. What sort of pulse width do I want to see?
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You should be able to getting to run 14.7 or close to it.
The MOT as you say should be 3.5 max in a Lambda test it will be between 0.97+1.03
Cant you get a wideband setup through the ecu and use quicktune to stabilise your idle fuelling?
I tried turning the wideband on and using quick tune just and it adjusted the fuel cell from 38.6 to 30 then the engine started hunting loads, is this because it needs more air with the reduced fuel? As I'm running open loop idle do I need to start with the idle higher than 1000rpm?
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So the car went for MOT (E30 M50 2.8 0.140mls) and did well other than failing on emissions. The results were CO 8 limit is 3.5 and HC 1894 limit is 1200. The car is just running the E36 plugin base map and is booked in for mapping on the 20th, problem is the car is going via transporter to be mapped and I want to drive it back once its done so really I want to get it passed before it goes. I believe as the car was registered Feb 1991 it only has to pass an emissions test at idle speed? So I have been tying to get it running a bit better at idle. I know when the car went for MOT it was running around 10 AFR and I can now get it to run 12-13 ish AFR but I doubt this will be good enough to pass still? Its running open loop idle control and I have idle ignition control on but when I try and tweak the fuel any more the idle starts to hunt. Any tips on getting it a little better would be great. MAP attached, just about to go take a log, will post that too. Thanks
mot idle edit was running 13 or 14 sfr.pclr
Here is the log, typically it wasn't hunting now. It was running 13 afr on this, surely I should be able to get it to 14.7?
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Oh and also the fuel trim table, what do the figures in the table represent? A percentage increase?
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I'm looking into setting up basic launch control from a digital input like a switch tied in with the handbrake switch. I think I understand the basic set up bar the last part called "Launch Limit Mode" what does this bit do? Is this how the Launch RPM is limited to the selected value? So it would use a fuel cut to limit the RPM to 3000? I'm just looking to limit the engine rpm to something like 3000rpm and adding some retard to get the turbo starting to spool. I have EGT so I can add fuel to keep EGT down, what is considered high EGT? Thanks
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Good job you found this thread then :-)
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I can report back it works fine with the new firmware. That 25% idle park step up made me panic though haha
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Yeh will do
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Ah I see, simple fix for me then, just update firmware on the ECU, Thanks Scott
Trigger error counter m50
in G4+
Posted
Both are fixed unfortunately. I can remember another forum member mentioning setting the cam sensor as a Hall effect rising edge? Would this have something to do with the zero crossings? The car runs fine with the crank sensor wires swapped then timing adjusted from -85 to 271?