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Guest Message by DevFuse
 

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crank position sensor questions


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19 replies to this topic

#1 speedbump

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Posted 26 February 2004 - 12:24 AM

while installing the 90 engine in my 86,the crank position sensor fell apart.We assume that it was dead to begin with,so does the ECM have a limp mode if this happens?

We jerry rigged the broken sensor,all good,but will the 90 sensor(1 wire) work with the 86 harness(2 wires)?Was one wire in 86 just a ground?

#2 speedbump

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Posted 26 February 2004 - 01:10 AM

bump

#3 GLCraig

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Posted 26 February 2004 - 02:18 AM

an 86 turbo didn't use the crank angle sensor type distributor, it used the inductive pick-up type, so just put the distributor from your 86 engine into your 90 engine.

#4 MilesFox

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Posted 26 February 2004 - 02:23 AM

i agree

#5 Skip

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Posted 26 February 2004 - 06:19 AM

Sorry guys,
Me thinks he is confusing the CAS with something else.
Maybe the knock sensor?
Care to share where this part is on the engine?


#6 MilesFox

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Posted 26 February 2004 - 10:38 AM

the optical type distys serve as the crank angle sensor, so the ecu knows when to fire. dont you know this? why ask if you do?

#7 calebz

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Posted 26 February 2004 - 11:45 AM

i agree with Skip.. Perhaps a pic of the bad sensor would help us determine what actually broke.

pictures and Kilowords and all that..

#8 speedbump

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Posted 26 February 2004 - 12:58 PM

unit is on top of the engine,behind the throttle body,closer to the bell housing and off center towards passenger side.It takes a 22mm socket to remove and has 2 wires

#9 rallyruss

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Posted 26 February 2004 - 01:33 PM

hm. I would guess knock sensor. sounds about right.

chill miles . no need to start a technicality war here.

I belive you are correct abouty the ground. on your 90 there was a ground sheilding in the wireing harness to the knock sensor. it reduces inductive signals that would confuse the ecm.

so you are using the 86 harness? you may want to get a early style knock sensor(2 wire).

#10 MilesFox

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Posted 26 February 2004 - 04:14 PM

Originally posted by rallyruss
chill miles . no need to start a technicality war here.

I



my bad, jumped the gun. but it does get old when someone posts, and someone else throws some remark to dismiss the post or the idea. seems like when SOMEONE in particular tries to shoot me down, i come back with some clever trick up my sleeve.

i see a bit of silence as of recent. oh well, i keep doing what i do, and people recognize that, and appreciate it

#11 Partsman

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Posted 26 February 2004 - 09:32 PM

I find it funny that two such incredibly knowledgeable Sub guys can get into such pi**ing contests! You guys keep this board rollicking; Skip with the erudite statements designed to go over the head, and Miles with the earthy comebacks. I appreciate you both!

#12 MilesFox

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Posted 26 February 2004 - 09:43 PM

typical usmb drama. you should have been here since last summer..................more to come this march......................

#13 Partsman

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Posted 26 February 2004 - 09:58 PM

Rock on, Fox!

:headbang: :headbang: :headbang:

#14 Dr. RX

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Posted 26 February 2004 - 10:03 PM

What a laugh, there is a 90 Subaru engine that does have a crank angle sensor, and a cam angle sensor, but the is an EJ22 (possible an EJ18 is Canada), but I doubt that is the engine he is putting in the car because the wiring is so different, a lot more then just one wire. Too bad he hasn't posted a picture yet, that would tell us a lot.

#15 speedbump

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Posted 26 February 2004 - 10:26 PM

cant take a picture cause I dont have the cash for a camera,im too busy buying engines.It looks like a hall sensor,but maybe its not.how does the knock sensor work?would it have any thing to do with less than stellar acceleration with the new engine?It almsot feels like the wastegate line has a leak,but it doesnt..

#16 MilesFox

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Posted 27 February 2004 - 01:05 AM

DAMMIT CORKY! just kidding..:D

sometimes the occasional "battle of wits" can be quite fun,,,as long as it doesnt get personal:eek:

#17 Setright

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Posted 27 February 2004 - 01:34 AM

It is the KNOCK sensor, no question.

Cam and crank angle are at the front of the engine, immediately behind the cam belt covers.

There was a redesign of the internals of the knock sensor, and the good one has a white connector - grey on the old style.

If the sensor returns a garbage signal, the ECU retards the timing and you can limp home. Just don't expect any throttle response :D

#18 speedbump

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Posted 27 February 2004 - 11:03 AM

AH HA!

Thanks Setright,thats how its acting,I thought it might throw the timing off!

#19 Setright

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Posted 27 February 2004 - 04:54 PM

May I recommend reseting the ECU when you replace the sensor?

Battery disconnect for an hour, connect back up, start and idle until the engine reaches normal operating temp, switch off. She'll be like a brand new engine ;)

#20 speedbump

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Posted 27 February 2004 - 04:57 PM

no its cool,we just timed it wrong to begin with!(13deg btdc instead of 25 deg)




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