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Status with ignition on

Old 05-24-17, 03:20 PM
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Status with ignition on

Hi guy's ust want to check.. when you put the ignition on and power up the ECU. Should the idle status on the software show idle or crank.. i.e before you have turned the engine one? and should the orange light be on or off? I noticed mine shows idle and then if you touch the throttle it changes to Crank sometimes it stays at crank after you come off.. but it looks like it might be in relation to the TPS and the TPS sensor not quite going back to zero every time? just wanting to double check is all.
Also something else I noticed when keying over the engine with the plugs out to check for spark. It looks like the engine turns over for a second or so before you start getting sparks? is that normal? It could well be all part of the cranking settings I have never thought about it before but just seemed a bit strange?
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Old 05-25-17, 06:56 PM
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Originally Posted by Leeroy_25 View Post
Hi guy's ust want to check.. when you put the ignition on and power up the ECU. Should the idle status on the software show idle or crank.. i.e before you have turned the engine one? and should the orange light be on or off? I noticed mine shows idle and then if you touch the throttle it changes to Crank sometimes it stays at crank after you come off.. but it looks like it might be in relation to the TPS and the TPS sensor not quite going back to zero every time? just wanting to double check is all.
Also something else I noticed when keying over the engine with the plugs out to check for spark. It looks like the engine turns over for a second or so before you start getting sparks? is that normal? It could well be all part of the cranking settings I have never thought about it before but just seemed a bit strange?
I don't have a microtech anymore so i don't know what colors stay on.
IIRC the screen should show nothing. If it shows idle or crank I believe this has something to do with the CAS. Conceptually, showing idle or crank means the ECU thinks the engine is idling or cranking, which means the car would be running i.e. ~1000 rpm for idle, and less then 300rpm for crank.
There is a TPS calibration screen that you should check.
Engine turning over sounds like too much fuel.

From the sound of this and your other threads you should read the Microtech manual, its about 30 pages including the table of contents. Its a super simple ancient ECU.
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Old 05-26-17, 07:14 AM
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The manual does leave a bit to the imagination from what I have seen.. and I don't think some of my points are likely to be covered.. I am pretty certain now all my issues are just rich idle. Need to find out about the status and lights though to see if that is an issue.

Cheers
Lee
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Old 05-26-17, 06:12 PM
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The lights are discussed in the manual and yes its normal for it to crank for a second or so before firing.
Have you rebuilt the engine Lee?
Its idling way too rich if in the 10s or even the 11s and its nothing to do with primaries being too big.
Check your wideband and also check primaries and secondaries are wired correctly.
Also throw a set of standard plugs in whilst messing with the vacumn tune.

Last edited by rx3sum; 05-26-17 at 06:17 PM.
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Old 05-27-17, 03:32 AM
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Thanks for info.. I have just rebuilt the engine yes.. So it was all piled up on first fire up which may have clogged the plugs a bit too. I will look into getting some stock heat eating 9 ones while I run in and little about . Never considered injectors could be wired wrong way. I will try and double check.
I can just about touch 12afr and then it does seem happy much after that. At least it was like that before rebuild I have only run it up a couple of time since...
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Old 05-27-17, 06:55 AM
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So progress report! I thinking I am making some. So first I checked the manual, all it says about lights is it will have the orange light on when ignition is on. Does not say about what status the ECU shows anywhere I could find, which is mainly what I want to know. Ignition on, status shows idle, changes to crank when you start to key over or touch the throttle and I noticed hen engine is running it says TPScal. Can someone confirm this is correct?
I checked injectors are wired correct which pretty sure I have done before and yes they are. Then I remembered the idle control valve has been connected to the aux output but never successfully setup. So I thought I will unplug it just in case it is doing something to mess with the idle. Anyway. Fired up and pulled fuel out during warmup as I knew was already rich. Possibly more to come put still. Then when warm I managed to pull lots out of the table more so than ever before. Some before and after shots below. Afr was hi 11's popping into 12's now and seems happy when fans cut in and out and stop starting. It remains to be seen if it will function the same when I next run up from cold. Will try tomorrow. If so I will gradually try and get more fuel out. I would imagine I will start getting close to the limits of the 875cc primaries before long though. We will see. Interesting though! Could well have been the idle valve causing trouble for all this while! Will update when I can.
https://cimg2.ibsrv.net/gimg/www.rx7...411f867bf3.jpgThis is where I started and it usually wanted to be before
https://cimg3.ibsrv.net/gimg/www.rx7...a8c158e8f9.jpgThis is where I have previous managed to get without starting to get a stall issue at some point.
https://cimg4.ibsrv.net/gimg/www.rx7...a3d9b973ac.jpgThis is where O am right now and it seemed like it was going to let me take even more out? I am not convinced it will be okay with this next time I try or after a decent drive but let's wait and see!
https://cimg5.ibsrv.net/gimg/www.rx7...4295fbfb06.jpgWater correction to start.. Which I already know is way rich
https://cimg6.ibsrv.net/gimg/www.rx7...be1471e75a.jpgWhere I am now. Left a bit rich assuming I might be able to take some fuel out on the main map
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Old 05-27-17, 02:08 PM
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I ran the car up again this evening. Was not quite cold but cool enough to work through most of the water table I adjusted. Had to put back I. A couple of % as expected but was about there. Then when I get to around 63deg water temp something happens that makes the idle fluctuate lean and die? This is what I have always struggled with trying to maintain a lean afr. So I messed about a bit watching where the map was going when it died and it basically drops into the idle row and even though that has the same cell value. ( I guess maybe not the cell to the right actually. That could be it. The idle is in 18Hg but I think pulling a bit less so partly into the RH cell. I may have answers one of my questions. Basically I seemed to get around it by adding a bit of fuel in the idle tow at 18Hg which seems backwards. But it appeared to work.this is what I have now.
https://cimg9.ibsrv.net/gimg/www.rx7...1973216e87.jpg

Went for a drive and seemed fine. So leading onto me next question. The cell to the right and below my 1500rpm/18Hg idle cell jump quite a bit I'm value. This is just when you give a little throttle for a light rev. It stumbles if these are leaner. Should these be like this or should they be lower valued and pump settings used to increase fuel on throttle application. I ask because at points cruising you hit these cells and no surprise the AFR is rich in the 11's?
Also I my 24Hg column should the values generally be lower all the way down as again when you hit this on light throttle cruising AFR is in the low 11's and I am pretty sure it should be around 13-14? My AFR on light load and throttle seems pretty good around mid 13's. Some's lower spots but smooth. Of course as you can see from the table this is a pretty fresh work in progress. I have a tuner but want to learn and do for myself what I can!
Thanks for pointers.
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Old 05-28-17, 08:37 AM
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Back to the original topic point. I cannot find this in the manual and I would like to verify what status the ECU should read at various time. I.e
ignition on bit engine off.
Starting/Cranking
idling
driving/off idle

mine says tps_Cal for the last and that doesn't seem right.

thank you
Lee
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Old 05-29-17, 03:40 AM
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double post

Last edited by rx3sum; 05-29-17 at 03:43 AM.
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Old 05-29-17, 03:43 AM
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In the menu there are some settings with either MAP or TPS are all yours set to MAP?
Is the TPS calibrated at idle?
My car has no interior at the moment so cant check mine for at least a couple of weeks.
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Old 05-29-17, 09:35 AM
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Okay.. I will have to look and see what these are? I assume in matrix mode I want them all to Map if they are not that way already? Do you know which setting screen and roughly which settings? I imagine they will be correct as it starts and runs.. just a few quirks to iron out best I can! Won't hurt to check though.
If you mean have I set my TPS to 0% with engine off using the TPS correction in TPS_Cal then yes mine is calibrated. If I should have done something else that the manual fails to mention then maybe not. You go in, adjust the physical CAS position and fine tune with the %correction on TPS_Cal screen. then come out of program mode and it is locked in.
Still wonders a bit from time to time I notice. so may need a tweak down a bit more.
But if I need an additional step please let me know.

Thank you
Lee
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