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Author Topic: Engine stalls when cold  (Read 15862 times)

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GTRS Fiero

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Re: Engine stalls when cold
« Reply #15 on: August 25, 2018, 09:50:47 pm »
Where is it?
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TopNotch

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Re: Engine stalls when cold
« Reply #16 on: August 25, 2018, 09:58:40 pm »
Quote from: GTRS Fiero on August 25, 2018, 09:50:47 pm
Where is it?
That depends on whether it's home-made or stock. If its stock, it's on the side of the block. The sensor end of it goes through a hole in the block and is next to the notched ring on the crank.
If it's home-made, there is a notched ring mounted on the crank pulley, and the sensor is there.
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GTRS Fiero

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Re: Engine stalls when cold
« Reply #17 on: August 25, 2018, 10:02:56 pm »
Ok.  Stock.  Looks to be under the trunk-side exhaust manifold.
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TopNotch

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Re: Engine stalls when cold
« Reply #18 on: August 25, 2018, 10:18:27 pm »
There is a small magnet in the end of the crank position sensor, which can weaken over time. Or the plastic the sensor is made of can crack. I replaced a cracked one in Buzz a while back.
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GTRS Fiero

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Re: Engine stalls when cold
« Reply #19 on: August 25, 2018, 10:24:36 pm »
Hmmm. I wonder if the magnet could sit differently, when I'm facing downhill.
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GTRS Fiero

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Re: Engine stalls when cold
« Reply #20 on: August 26, 2018, 09:31:36 am »
Darn.  There are 2 crank position sensors.  One easy-to-reach, and one that isn't.  I wonder which one could be causing the problem.
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TopNotch

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Re: Engine stalls when cold
« Reply #21 on: August 26, 2018, 11:48:37 am »
I've never head of having two fwo lf them. I replaced one on a 2002 Saturn Vue (with Honda engine), and there was only one an that engine. So it's certainly not something more "modern" than 2.8's or 3.4's.
Unplug each one (one at a time), and see which one the engine won't run without.
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Fierofool

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Re: Engine stalls when cold
« Reply #22 on: August 26, 2018, 01:26:12 pm »
There should only be one crank sensor on a 3.4.  It's on the trunk side, mid block near the freeze plug.  There was a cam sensor on the 3.4, but I believe that was located up top and there was a low oil sensor in the side of the oil pan. 
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GTRS Fiero

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Re: Engine stalls when cold
« Reply #23 on: August 26, 2018, 01:27:55 pm »
No one carries the part.  Tried all the local parts stores.  Probably going to have to have one shipped.  This one is less than 2 years old.
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Fierofool

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Re: Engine stalls when cold
« Reply #24 on: August 26, 2018, 01:50:27 pm »
« Last Edit: September 01, 2018, 06:39:49 pm by GTRS Fiero »
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There are three kinds of men:

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2.    The few who learn by observation.
3.    The rest of them have to pee on the electric fence and find out for themselves.    Will Rogers

GTRS Fiero

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Re: Engine stalls when cold
« Reply #25 on: August 26, 2018, 02:10:27 pm »
They don't have them locally.
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GTRS Fiero

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Re: Engine stalls when cold
« Reply #26 on: August 26, 2018, 04:41:58 pm »
The crank position sennsor is dirty on the end.  There is gunk on the end of the magnet.  I cleaned off the gunk, and re-installed the sensor while waiting on a new one.  Maybe the reluctor wheel is not my friend.
« Last Edit: August 27, 2018, 09:24:48 pm by GTRS Fiero »
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GTRS Fiero

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Re: Engine stalls when cold
« Reply #27 on: August 27, 2018, 09:30:34 pm »
I managed to pick up a crank sensor from another state while waiting on the one I ordered.

After installing the new sensor, I went for a drive.  True, it was warmed up by the time I got it on the road, but I went down that hill twice with no issues.  It didn't even try to die.  I did not take any precautionary measures to prevent it from dying.

I'll play with it more tomorrow, but it semed to have a better idle.  I may still replace the IAC.

The bad news is that the new sensor is BWD brand.  No idea what the previous 2-year-old one was, but a different brand..
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GTRS Fiero

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Re: Engine stalls when cold
« Reply #28 on: August 28, 2018, 10:26:07 pm »
Well, the dying when going downhill issue seems to be cured.  It still tries to die on tip-in from idle when cold.  I'm not sure what is causing that.
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GTRS Fiero

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Re: Engine stalls when cold
« Reply #29 on: August 29, 2018, 08:08:12 pm »
Well, today I unplugged the ECU for 15 minutes and replaced the IAC.  I went for a drive.  I'm not sure if the problem is fixed or not.  After a few minutes, no more hesitation.  That could be because it warmed up or because it is fixed.

I can get a pliers on the O2 sensor, but have no space to move the pliers.
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