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Unread 11-09-2008, 07:02 PM   #1
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Default car stalling out after it warms up for 20 minutes

hi

A kia rio 2001

Car was stalling out everytime I stopped at a light or stop sign.

Check engine on ......I took the car to the garage, they hooked
it up to the computer. Replaced one of the 2 oygen sensors.

I got the car back, drove it for a couple of days.....still acting up.

Back to the garage.......they sent it to Kia for diagonist check.....
I picked up my car and drove it for a few days.....car still stalling
out.

I took it back to the garage .....changed 2nd oxygen sensor.
I got the car back drove it a few days....still acting up.

I take car back to garage ......replace senor on camshaft.

I replaced the spark plugs and new wires, and coil.

Drove the car a few days and it's not stalling out now
when stopping at lights or stop signs.

But now after driving the car for 20 minutes......when you
stop at a light or stop sign and press the gas pedal to go
the car stalls out.

Iam only a 35 minute drive from home to work. After 20
of driving when you do stop and press on the gas to go
it stalls out.

But if I drive for 15 minutes.....pull the car off the road...
Turn the car off and let it sit for 1 minute.....restart the
car and continue my drive home the car does not stall out,
or act up.

Does anybody have any ideas?

Tks.

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Unread 11-09-2008, 07:35 PM   #2
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really needs a good diag to know for sure but it sounds like a timing issue have you done the belt yet. how about fuel pressure when hot what's the reading in psi?

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Unread 11-09-2008, 08:18 PM   #3
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I don't know much about Kias, do they have throttle positioning sensors?

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Unread 11-09-2008, 08:50 PM   #4
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Also What type of spark plugs are you running and when's the last time you had the tranny serviced. Some times the trans syliniod's can stick and cause this.

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Unread 11-09-2008, 09:16 PM   #5
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4 words: Idle Air Control Valve. Go to Napa, you can pick one up for like $45. It's on the top of your engine. Only 2 bolts and a gasket. It's easy and you can do it yourself.

It looks EXACTLY like this on your motor:



Wow for some reason the pic isn't loading. Lame.

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Unread 11-09-2008, 10:02 PM   #6
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Quote:
words: Idle Air Control Valve. Go to Napa, you can pick one up for like $45. It's on the top of your engine. Only 2 bolts and a gasket. It's easy and you can do it yourself.
Ya I was thinking about that but idle air control valve would cause a constant problem after warm up not reset after restart that almost sounds like TPS is out of adjustment or timing but the trans syliniod is a more common problem especially when a recent trans service as been done idiot mechanics normally crack them on the pan. And it will reset after restart but it normally causes the vehicle to run rough and immediatly quiet when pulling to a stop.

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Unread 11-09-2008, 10:46 PM   #7
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Sounds like a poor fuel supply problem.

Weak fuel pump or a restricted line or even filter.

I agree I did think IAC but it should be consistent.

I had a weak fuel pump on my truck that began with erratic idling, then stalling.

When an engine is idling, steady fuel pressure is much more critical than running at a higher speed, although I would think you might experience some hesitation or surging.

I wouldn't go any further until I knew that what the fuel pressure was and that it was constantly steady.
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Unread 11-09-2008, 10:59 PM   #8
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Check your fuel pressure. The air control valve is a good idea too, but this does sound a lot like a fuel issue. Try picking up a fuel filter for $10 at napa and see if that does the trick.

Also, one thing that was causing my mom's grand prix to act up is the problem with an emissions hose coming loose. Check that, it's easy and a no brainer if it's the problem. You'll smack yourself.
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Unread 11-10-2008, 12:18 AM   #9
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I didn't think of that, good point guys. Always start off with the cheapest easiest thing to fix, and that would be the fuel filter.

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Unread 11-10-2008, 12:23 AM   #10
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Please no if you had any idea how many times I hear a day my car won't start could it be a fuel filter? NO IT'S NOT MAY BE A LOW PRESSURE PROBLEM BUT IN THE COMBINED 120+ YEARS OF EXPERIENCE IN MY SHOP ONLY OUNCE HAS A FILTER ON A MODERN FUEL INJECTED CAR CAUSED A NO START AND IT WAS 2 SECONDS AFTER REPLACING THE PUMP THE PUMP BREAKING AND THROWING DEBRIS IN THE FILTER. IF YOUR FILTER IS CLOGGED IT'S GOING TO BE DUE TO A MORE SERIOUS PROBLEM THS WAS A BRAND NEW PUMP DEFECTIVE IN THE BOX NORMAL WEAR AND TEAR WON'T CAUSE A FILTER TO CLOG IT HAS TO MAKE IT PAST THE SCREEN FIRST WHICH WILL CAUSE PUMP FAILURE .

Sorry just had to vent.

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