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#1 (permalink) Old 10-08-2013, 12:53 PM
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Hello! My name is Terry and am needing some input about my 2001 Sportage Limited.

I have a mobile mechanic who has worked on my Kia for many years. Recently the timing belt broke while I was driving -- apparently the belt cover had previously been broken and glued together with silicone and the gasket may have gotten caught in the belt and caused it to break (belt only had 35K on it). My mobile mechanic changed the belt, along with water pump, and spark plugs and coil wire.

Since this work was done, car does not idle properly. For instance, when I am sitting at a light, it feels like it us "surging" a little, causing my body to kind of jerk forward and back in the seat. If you take your foot off the gas, and let it creep, it creeps in "jerks"...not violently, but enough for me to know it is not running right. At higher speeds, it drives just fine! There are times when it seems worse than others.

My mechanic says he has tested the timing with his test equipment, and it is "perfect". There are no error codes when tested. He says he is absolutely certain that the timing belt is not one tooth off--which has been suggested to me when I explained it to my son, who is a car buff and mechanic (but lives very far away from me so cannot help.)

Mechanic also says that if it was one tooth off, it would be giving us "codes", plus if the cams/valves? were damaged, it would be making noise, which it is not.

Can anyone give me some feedback that I can relay to my mechanic? Is it possible that belt could be one tooth off and not register any codes, make any noise, and drive well when accelerating?

Thank you so very much,
Terry
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#2 (permalink) Old 10-08-2013, 01:39 PM
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Welcome to the forum.

It is possible that it can be one tooth out without an error code - the timing light test does not tell all - you need to view all three timing marks.

Also check for vacuum leaks, and a sticky IAC.


Please take the time to fill in your profile detail.

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#3 (permalink) Old 10-08-2013, 02:30 PM
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Originally Posted by ron1004 View Post
Welcome to the forum.

It is possible that it can be one tooth out without an error code - the timing light test does not tell all - you need to view all three timing marks.

Also check for vacuum leaks, and a sticky IAC.


Please take the time to fill in your profile detail.
X2.... Check the static engine timing..... Philip
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#4 (permalink) Old 10-08-2013, 04:17 PM
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What is an IAC?
When you say "timing light", what do you mean?
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#5 (permalink) Old 10-08-2013, 04:22 PM
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I am not a tech and don't understand all the codes you are using, such as X2...can you please be more descriptive, thank you!
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#6 (permalink) Old 10-08-2013, 06:10 PM
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I am not a tech and don't understand all the codes you are using, such as X2...can you please be more descriptive, thank you!
X2 is not a code, I was agreeing with ron1004's advice.....

The engine has 2 distinct timing modes.

Static ENGINE timing, the correlation between the crank, pistons and valves....(must be correct for the engine to run, must be physically set)

Ignition Timing, the timing of the actual spark which ignited the compressed fuel/air mixture.. in the cylinders.. This is what your mechanic checked with his instrument (timing light). If the static engine timing is not correct, no amount of ignition timing can correct....

.....Philip
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#7 (permalink) Old 10-08-2013, 07:27 PM
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Quote:
Originally Posted by TerryAnn View Post
What is an IAC?
Idle Air Control valve, also known as Idle Speed Control valve (ISC)


Quote:
When you say "timing light", what do you mean?
Quote:
Originally Posted by TerryAnn View Post
My mechanic says he has tested the timing with his test equipment, and it is "perfect".
I made an assumption that his "test equipment" was a timing light.

Ask your mechanic what test equipment he used to check the valve timing (not to be confused with ignition timing).

For service info register (free) with KiaTechInfo and click on 'Shop' on the left, and for elect schematics click on 'ETM'.

Quality and not quantity counts.

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Last edited by ron1004; 10-08-2013 at 07:31 PM.
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#8 (permalink) Old 10-08-2013, 09:17 PM
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Thank you so much for the explanations. So are you saying that with his timing light, he could not have checked both types of timing?
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#9 (permalink) Old 10-08-2013, 09:24 PM
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Quote:
Originally Posted by TerryAnn View Post
Thank you so much for the explanations. So are you saying that with his timing light, he could not have checked both types of timing?
No, it can only be used to check the ignition timing.

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Originally Posted by ron1004 View Post
Ask your mechanic what test equipment he used to check the valve timing (not to be confused with ignition timing).
Still interested to hear his reply.

For service info register (free) with KiaTechInfo and click on 'Shop' on the left, and for elect schematics click on 'ETM'.

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#10 (permalink) Old 10-08-2013, 10:10 PM
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Hello tech friends! Turned out it was one tooth off afterall!!!
By the way, it sounds different since he fixed it. Has a kind of high-pitched whine at excellerated speeds that it did not have before. Is this ok?

Last edited by TerryAnn; 10-14-2013 at 10:21 PM.
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