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rough running 16v 1.6

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Offline joezuki

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rough running 16v 1.6
« on: May 24, 2007, 09:36:30 AM »
My engine started doing something strange.  When it's cold, it runs fine.  When it's up at operating temperature, it runs fine.  when it's between the two, it wants to stall out.  It acts like a carburator with a bad automatic choke.  At red lights I need to throw it in neutral & keep the rpms up.  Its not sputtering, it just has a real low idle .  Any ideas what I should check or replace?  It's a 1994 16valve 4 door JX with 130,000 miles.  I just replaced, cap, rotor, plugs & wires & nothing changed.  All the plugs looked good that I took out.   Help  ???

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Offline Rhinoman

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Re: rough running 16v 1.6
« Reply #1 on: May 24, 2007, 10:22:22 AM »
Check the Coolant Sensor
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Offline joezuki

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Re: rough running 16v 1.6
« Reply #2 on: May 24, 2007, 10:43:09 AM »
where is it & how do I check it?  The temperature guage is working.  Are they the same sensor?
« Last Edit: May 24, 2007, 10:45:29 AM by joezuki »
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Offline greenmachine

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Re: rough running 16v 1.6
« Reply #3 on: May 24, 2007, 11:18:06 AM »
my 16v has been like that for about 60,000 miles now. its especially bad when i shut the car off for a few minutes and start it back up.  ive found letting the car idle for a minute before driving eliminates the problem.
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Offline joezuki

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Re: rough running 16v 1.6
« Reply #4 on: May 24, 2007, 11:21:25 AM »
I'd like to fix it if I can.... maybe someone out there can help us both out.  I still have to figure out where the coolant sensor is.  I'll go out & take a look after work.
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badhabits

Re: rough running 16v 1.6
« Reply #5 on: May 24, 2007, 08:30:33 PM »
I have a 94 js 2x4 4dr 16v that I converted to a 4x4, I had the exact same problem that you guys are having.  Clean the inside of your throtal body and the vacume lines that lead to it, and try some "Heat" in your tank every once in a wile when you fill up.  Mine is running like a sewing machine at 160,000 miles.  There is one vacume line in peticular that connects to the top of the body, the opening is about the size of a pin.  It gets plugged very easy, after cleaning your computer will need to relearn how to run your engine.  I hope this works for you.

Good luck
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Fasta76

Re: rough running 16v 1.6
« Reply #6 on: May 24, 2007, 09:34:28 PM »
Try a can of Seafoam!! Works wonders!!nhelped with my idle problems!!!
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Offline joezuki

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Re: rough running 16v 1.6
« Reply #7 on: May 25, 2007, 05:18:50 AM »
i guess i know what i'll be cleaning this weekend ::)  I sure hope it works!
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Offline greenmachine

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Re: rough running 16v 1.6
« Reply #8 on: May 25, 2007, 09:58:31 AM »
what is seafoam?
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Offline RACER X

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Re: rough running 16v 1.6
« Reply #9 on: May 25, 2007, 12:55:24 PM »
ask napa
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Offline mrfuelish

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Re: rough running 16v 1.6
« Reply #10 on: May 25, 2007, 01:01:15 PM »
Ya ask napa why they raised there prices sky high last week, sea foam went up a buck sixty, prolong went up five bucks. >:(
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Fasta76

Re: rough running 16v 1.6
« Reply #11 on: May 25, 2007, 04:36:14 PM »
look up seafoam on google!! The stuff works like crazy!
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badhabits

Re: rough running 16v 1.6
« Reply #12 on: May 25, 2007, 07:21:50 PM »
Seafoam is exactly what I used.
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Offline greenmachine

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Re: rough running 16v 1.6
« Reply #13 on: June 19, 2007, 11:40:29 PM »
I used a bottle of professionals favorite 9999 mile treatment and it quieted her down alot. It was buy one get one at advance. Now I have to relearn how to drive her because she runs so smooth.
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Offline beercheck

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Re: rough running 16v 1.6
« Reply #14 on: June 20, 2007, 07:54:45 AM »
My '96 did the same thing.  I think it was a computer problem, but it never got any worse, so I just let it go.  Did all the throttle body cleaning and all that with no real results.

What I eventually found was if I let it idle after starting just long enough for it to almost die but catch itself, it would run like a top until shutting it off again.  Usually took less than a minute cold, shorter warm.  I just couldn't touch the throttle before it did that "almost die" thing, or it wouldn't idle well until shutting it off again (even after driving 100 miles) and letting it do its thing. 
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