Engine issue 2002 2.7L GLS need advice I’m stumped. - Hyundai Forums : Hyundai Forum
 
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post #1 of 8 (permalink) Old 05-12-2019, 09:24 PM Thread Starter
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Engine issue 2002 2.7L GLS need advice I’m stumped.

Engine wasn’t running good, low rpms. Exhaust was rusted out, so it was replaced.We also swapped out plugs, wires, tps, and the intake air controller sensor, because of the codes I was told my the guy at the repair shop. Started car and it revs very high for a min or so, then starts surging up & down. I checked to verify I reconnected all the hoses, rechecked bolts on the replaced sensors and cleaned the map sensor. Timing belt was changed 3 years ago about 20,000 on it.
Really appreciate any advice. Limited it how much money I can throw at the problem. My son is getting rides from friends at school to his job,
So I need to get his done.
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post #2 of 8 (permalink) Old 05-13-2019, 10:45 AM
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Quote:
Originally Posted by Tcrow02 View Post
Engine wasnt running good, low rpms. Exhaust was rusted out, so it was replaced.We also swapped out plugs, wires, tps, and the intake air controller sensor, because of the codes I was told my the guy at the repair shop. Started car and it revs very high for a min or so, then starts surging up & down. I checked to verify I reconnected all the hoses, rechecked bolts on the replaced sensors and cleaned the map sensor. Timing belt was changed 3 years ago about 20,000 on it.
Really appreciate any advice. Limited it how much money I can throw at the problem. My son is getting rides from friends at school to his job,
So I need to get his done.
What codes do you have?





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post #3 of 8 (permalink) Old 05-13-2019, 12:59 PM
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Check that your throttle cable(s) are adjusted properly.
I've experienced surging idle on a 2.7 in the past when the cruise control cable was too tight and holding the throttle valve open.
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post #4 of 8 (permalink) Old 05-13-2019, 02:38 PM
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Would check for vacuum leaks.
Well, that really was a guess

However, would do as Autospark says and check the Throttle, cables, TPS (sometimes a good spray of brake cleaner clears it up)

Good luck and please come back and let us know how it goes
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post #5 of 8 (permalink) Old 05-17-2019, 09:08 AM
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Anymore codes?


Idle Air Control Valve on throttle body could be the issue. At 190K, my daughters was carboned up pretty good and wouldn't idle well. Idles perfectly after a good cleaning with berrymans.
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post #6 of 8 (permalink) Old 05-17-2019, 02:59 PM Thread Starter
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Follow up. Checked the cruise control & throttle cables, Both were fine. The idle air control valve & TPS sensor are new. Ran the codes and just this one showed. P0122 throttle pedal position sensor switch A circuit low.
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post #7 of 8 (permalink) Old 05-17-2019, 05:52 PM
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P0122 throttle pedal position sensor switch A circuit low.
Your engine doesn't have a throttle pedal sensor. The code will be referring to the TPS on the throttle body. Since you've already swapped the sensor that kinda suggests you have a wiring fault. Low signal voltage trouble codes are often a symptom of a sensor power supply issue.
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post #8 of 8 (permalink) Old 05-23-2019, 10:13 AM
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Or it could just be out of adjustment. They do adjust a tad. 200-800 mvolts is the range for the signal

Last edited by chris6414; 05-23-2019 at 10:39 AM.
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