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Old 02-22-2017, 07:38 AM   #1 (permalink)
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Default 2005 Suzuki Forenza THROTTLE POSITION SENSOR?

I have a 2005 Suzuki Forenza, 153,000 miles, 4 cylinder. I bought the car used and it had a incorrect idle of 2x1000 RPMS and the accelerator pedal doesn't push down smoothly, sort of as its stuck or giving resistance back. I have to push down hard on it whenever i let my foot up off of it, and then when i do push down hard the engine revs up because the force i have to push it down. it came up as code p0122 (Throttle Position Sensor).
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Old 02-22-2017, 01:58 PM   #2 (permalink)
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Pedal, cable or throttle body sounds like it seizing up. I suspect the code comes up because the throttle body/sensor does not return to it,s idle position. I would disconnect the cable at either end and then you can tell which bit is tight.
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Old 02-23-2017, 08:54 PM   #3 (permalink)
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I went to a salvage yard and bought another throttle body . I'm hoping to just replace it or swap parts but hopefully this fixes the issue . I start the car and immediately it idled at 3000rpms ! Then the accelator pedal is giving me so much resistance to push down on it . ( the pictures are the "new" throttle body I purchased today). Any advice on cleaning this thing ?
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Old 02-24-2017, 12:37 PM   #4 (permalink)
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That motor driven throttle body you found is listed as 2006 onwards, but I guess you have a late 2005. This is controlled by an throttle pedal actuator rather than a cable. If the pedal is hard press it must be this..

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Old 02-24-2017, 01:08 PM   #5 (permalink)
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Do you have a link and the part name / part # for that item ? And that throttle body I purchased is for a 2006+ throttle body ? I got it from the salvage yard
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Old 02-25-2017, 02:59 PM   #6 (permalink)
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Just from the parts listings.

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Old 02-25-2017, 03:10 PM   #7 (permalink)
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The diagram shows the 2004-5 cable operated version.

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Old 02-25-2017, 06:22 PM   #8 (permalink)
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If you have a cable operated throttle, check the condition of the transmission (auto) kick down cable.. they are known to seize..

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Old 02-27-2017, 07:54 AM   #9 (permalink)
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i went to autozone and asked him questions about the throttle body, and he informed me that GM makes electrocial throttle body motors (idiots, right?), so what i did was bought throttle body cleaner and im gonna go to my mechanic and him and i will clean the new one, test the position sensor, and we'll replace it and make sure everything is operational. Hopefully this fixes the idling problem, some mornings ill start the car, it'll idle in park at 3,000 RPMS. then once i put it in drive, the transmission feels like it jerks a little bit at 10-20 MPH, then again around 40-50 MPH. then when i stop at a red light or stop sign while the car is in drive, the whole air intake above the throttle body will move rapidly while in place, causing the whole car to move.
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Old 02-27-2017, 07:58 AM   #10 (permalink)
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For the issue, above the accelerator pedal, i found a spring that holds the pedal in place, and i sprayed it with WD-40, and cleaned it off and there was old grease in the springs. after that i noticed after coming to complete stops and driving high speeds once taking my foot off the accelerator pedal, to the breaks, and back to the accelerator pedal (If a car was turning in front of me is a perfect example), it was much much easier to accelerator again, pedal gave less resistance, but using cruise control, it would be hard to push down on again.
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