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cold weather sputter

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mperry

cold weather sputter
« on: November 29, 2004, 11:01:48 AM »
W/ 86K miles, the 94 Kick runs well... except when it's cold. It sputters (half burnt gas) for the first few blocks. It's in good tune, so I'm wondering if the spark isn't strong enough.

Any suggestions about a coil replacement? How to replace the existing (tiny) coil?

thnx, map
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Offline wildgoody

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Re: cold weather sputter
« Reply #1 on: November 29, 2004, 11:07:18 AM »
That tiny non oil filled coil is actually
a hotter coil than the older style

You might look at a hotter plug, or
just allowing the trucklet to warm
a little longer before driving

Wild
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Offline Maiden Hell

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Re: cold weather sputter
« Reply #2 on: November 29, 2004, 11:51:44 AM »
As I've mentioned many times before, living is sub zero temperatures, my Sidekick always idles rough even sputtering a little when I first start it up, but after ten or more minutes (depending on how cold it is) that little motor runs as smooth as silk.  Plus it also helps that I run full synthetic motor oil too, which flows water in even freezing temperatures.
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Offline mrfuelish

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Re: cold weather sputter
« Reply #3 on: November 29, 2004, 03:55:14 PM »
Is it an eight valve or a sixteen valve engine?
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Offline jerryp58

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Re: cold weather sputter
« Reply #4 on: November 30, 2004, 02:50:09 AM »
Auto or manual?  The auto's have a heater plate/screen in the TB assembly; could that be malfunctioning?

Not sure how rough a "sputter" is.  My auto idles pretty good on a cold weather startup, but will run a little rough if I put it in gear and pull away without waiting a minute or two for warm-up.

Does anyone know the voltage output of the stock coil?

I can tell you that I didn't notice any difference in idle/performance after installing a Petronix 42k hi-vibration coil :-/
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Jerry
1990 Geo Tracker,  2-Door Hard Top
1.6L 8v, 4x4 Automatic, 0" lift
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mperry

Re: cold weather sputter
« Reply #5 on: November 30, 2004, 08:41:03 AM »
It's the 8 valve engine w/ manual tranny. You can feel it missing when pulling away in the morning... like it's running on 3 cylinders... and the stench of half-burned gas is no delight.

It's really noticeable when temps drop below freezing.
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Offline wildgoody

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Re: cold weather sputter
« Reply #6 on: November 30, 2004, 09:53:52 AM »
Ya, it could be that PTC plate that
Jerry was talking about, I have a
spare if you need one

Wild
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mperry

Re: cold weather sputter
« Reply #7 on: November 30, 2004, 09:59:47 AM »
Quote
Ya, it could be that PTC plate that
Jerry was talking about, I have a
spare if you need one

Wild


PTC plate? Is that the part only on the automatics? (I don't recall seeing that in the repair books... any suggestions on how to test it?)
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Offline wildgoody

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Re: cold weather sputter
« Reply #8 on: November 30, 2004, 10:07:05 AM »
Ya PTC (positive temperature coefficient)
it looks like a basket shaped thing, has
fairly large wires going into it, and a waffle
looking screen that the fuel would spray
thru.

I don't know if this came on the Man Trans
or not, I had one on my 89' but I have an
Auto. To the best of my figuring it's for cold
weather driving, which I don't get enough
of here to even worry about, I took it out
long ago.

You will find it between the Throttle Body
and the manifold, looks to be about 1/4"
thick or so, and looks like a throttle body
spacer except it has 2 wires coming out of
it, to test I think an Ohm meter and hook
into the plug, if no reading of resistance,
it's probably bad, and makes no heat

I will see if I can find it in the Haynes
repair book, but I think it's in there
under the Fuel Injection stuff

Wild
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