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'91 ecu troubles
#25
great questions !
only deleted my wrong posts. (all photos are on my web page still or above in the Gallery above, all still there click ,Gallery+other = bingo. your stuff.
REDUX 2:
I really do not know what is in your ECU, for sure im not sure the free schematic you have even matches what you have.
all I know is it does have a CMP and CKP sensor. and you have not told me how many pins are in each.

below is HALL sensor , note it make perfect signals even at 1 RPM... like magic, its Electronics doing that magic inside the CMP here.

http://www.fixkick.com/IGN_timing/video-...Dtest.html


NON HALL: failures.
the ECU uses a device called a zero crossing detector , if it cant see the signal cross zero, the engine will make no spark.
it is that simple, just that.
how can the signal fail, Ill count the ways.... numbered...
1: wrong sensor , or bad sensor., on some cam sensors there is the cam plastic, coupling device, installed wrong, broken or fell off....Hyundai issues.
2: wired backwards.
3: wires bad. (cut, broken, rusted, damaged , crushed, in any way )
4: shields bad, on the coax line pairs.... if bad, the noise cranking will exceed the real signals.
5: bad sensor gap set. per FSM. read that? installed wrong, or calibrated wrong.
6: damage to the TONE wheel. The part the has bumps and triggers the CKP.
7: A scope sees all this.... (if the ECU scans show RPM and CKP dead, it IS)
8: bad ECU, rare for inputs on ECU to fail, but outputs do fail easy.
9 : an engine swap gave you the wrong crank tone ring...
Kinda overwhelming all this , lacking a SCAN tool that tells you, gee, CMP or CKP is dead or intermittent.

each pulse is the tone wheel teeth passing by the sensor on the crank.
this is our USA Beta engine 1996 CKP tone ring, not saying yours is same, i cant do that. we dont have books from your country, here.

CKP ring. note the MISSING tooth?
[Image: 3_04_10_15_1_34_50.jpeg]
http://www.fixkick.com
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Messages In This Thread
'91 ecu troubles - by Kirk - 06-05-2015, 04:55 PM
RE: '91 ecu troubles - by fixkick - 06-05-2015, 11:05 PM
RE: '91 ecu troubles - by Kirk - 06-08-2015, 04:28 AM
RE: '91 ecu troubles - by GeoHacker - 06-06-2015, 02:41 PM
RE: '91 ecu troubles - by fixkick - 06-06-2015, 11:17 PM
RE: '91 ecu troubles - by GeoHacker - 06-08-2015, 07:23 AM
RE: '91 ecu troubles - by fixkick - 06-08-2015, 04:39 AM
RE: '91 ecu troubles - by fixkick - 06-08-2015, 11:16 PM
RE: '91 ecu troubles - by greenfield54 - 09-26-2015, 09:15 PM
RE: '91 ecu troubles - by fixkick - 09-26-2015, 11:38 PM
RE: '91 ecu troubles - by greenfield54 - 09-27-2015, 08:26 PM
RE: '91 ecu troubles - by greenfield54 - 09-29-2015, 09:41 PM
RE: '91 ecu troubles - by greenfield54 - 10-01-2015, 07:50 PM
RE: '91 ecu troubles - by fixkick - 10-01-2015, 11:55 PM
RE: '91 ecu troubles - by greenfield54 - 10-02-2015, 09:40 PM
RE: '91 ecu troubles - by greenfield54 - 10-03-2015, 10:11 PM
RE: '91 ecu troubles - by fixkick - 10-03-2015, 10:57 PM
RE: '91 ecu troubles - by greenfield54 - 10-03-2015, 11:03 PM
RE: '91 ecu troubles - by fixkick - 10-03-2015, 11:15 PM
RE: '91 ecu troubles - by greenfield54 - 10-03-2015, 11:21 PM
RE: '91 ecu troubles - by fixkick - 10-03-2015, 11:36 PM
RE: '91 ecu troubles - by greenfield54 - 10-03-2015, 11:47 PM
RE: '91 ecu troubles - by fixkick - 10-03-2015, 11:54 PM
RE: '91 ecu troubles - by greenfield54 - 10-04-2015, 08:56 PM
RE: '91 ecu troubles - by fixkick - 10-04-2015, 11:42 PM
RE: '91 ecu troubles - by fixkick - 10-05-2015, 02:15 AM
RE: '91 ecu troubles - by greenfield54 - 10-05-2015, 09:42 PM
RE: '91 ecu troubles - by fixkick - 10-05-2015, 10:43 PM
RE: '91 ecu troubles - by greenfield54 - 10-06-2015, 09:01 PM
RE: '91 ecu troubles - by fixkick - 10-06-2015, 11:00 PM
RE: '91 ecu troubles - by greenfield54 - 10-07-2015, 06:41 PM
RE: '91 ecu troubles - by fixkick - 10-07-2015, 10:07 PM
RE: '91 ecu troubles - by fixkick - 10-07-2015, 11:11 PM
RE: '91 ecu troubles - by greenfield54 - 10-09-2015, 09:32 PM
RE: '91 ecu troubles - by fixkick - 10-09-2015, 10:04 PM
RE: '91 ecu troubles - by greenfield54 - 10-09-2015, 10:23 PM
RE: '91 ecu troubles - by fixkick - 10-09-2015, 11:19 PM
RE: '91 ecu troubles - by fixkick - 10-10-2015, 12:36 AM
RE: '91 ecu troubles - by greenfield54 - 10-10-2015, 01:10 PM
RE: '91 ecu troubles - by fixkick - 10-10-2015, 10:35 PM
RE: '91 ecu troubles - by greenfield54 - 10-16-2015, 09:08 PM
RE: '91 ecu troubles - by fixkick - 10-22-2015, 03:56 AM
RE: '91 ecu troubles - by greenfield54 - 10-22-2015, 09:20 PM
RE: '91 ecu troubles - by fixkick - 10-23-2015, 01:25 AM
RE: '91 ecu troubles - by greenfield54 - 10-24-2015, 09:03 PM
RE: '91 ecu troubles - by fixkick - 10-25-2015, 04:12 AM
RE: '91 ecu troubles - by greenfield54 - 10-26-2015, 09:16 PM
RE: '91 ecu troubles - by fixkick - 10-26-2015, 10:41 PM
RE: '91 ecu troubles - by greenfield54 - 10-27-2015, 09:29 PM
RE: '91 ecu troubles - by fixkick - 10-27-2015, 11:04 PM

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