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09 Pontiac Vibe 2.4L(Toyota 2AZ-FE) AWD 115k I was just playing around with my new OBDII scanner and I noticed this: Foot off the pedal:   Pedal to the floor:   I've done a very stupid thing once or twice in the past, when cleaning the throttle body I forced it open by hand (it's an electric) instead of using the gas pedal. Note: I've had these recalls done http://www.cars.com/recalls/pontiac/vibe/2009/ I don't think they would go in and nerf my gas pedal, but who knows? I've noticed that it will intermittently, when I stomp on the gas, have some decent pull and go, but most of the time it just slowly gets up to speed. Basically I'm wondering if I need to replace the TB or the pedal sensor? Or is there something else going on?
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Mar 21, 2015 18:05
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| # ¿ Apr 29, 2024 14:21 |
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Slavvy posted:Are you revving the car in neutral? Things don't work the same in neutral as in drive so you really need to look at the current data whilst driving. The ecu knows there's no load and you're just revving it for shits and giggles so it won't open the TB properly and some cars even cap the revs around 4,500rpm so you don't blow the engine up like a dumbass. I've never worked on a vibe but my toyota experience has shown me that 2az's (and modern toyotas in general) are just really sluggish and unresponsive at the best of times. Unless you had the ignition on when you were cleaning the TB, you couldn't have hurt anything; I've done it dozens of times with no issues. Slavvy posted:You can't force the TB open using the gas pedal, it doesn't work that way. The ecu doesn't open the TB proportionate to the percentage the gas pedal is depressed. It instead calculates the amount of torque you're demanding from the engine (your accelerator pedal is actually a torque pedal) and opens the TB however much is necessary to reach that result. Torque percentage and TB opening percentage are not linear. Slavvy posted:Or are you expecting both accelerator position percentages to be the same? Cause that's normal. What do you actually think is wrong with your car, if anything? Well I would expect the position to go up to 100% when I press the pedal to the floor, not 81.2%. Also it shouldn't read at 15.7% when the car is off and my foot is off the pedal, should it? I just did the same check on an 02 grand prix and it went from 0 to 100 when I went from off pedal to all the way down. The car was just in the 'on' position when I did the reading, not running, so there was no revving going on. It just seems like the pedal sensor or the throttle position sensor is out of whack, which may be what slows the car down when I really stand in it. I know it's a high torque 4-banger with AWD so I don't expect my eyes to sink back when I step on it, but there is a distinct difference in acceleration at seemingly random times. Also my gas mileage is pretty lovely. I'm lucky to get 22-23mpg and I do drive mostly on the highway. I really keep up on my regular maintenance and check my tires twice a month consistently so I doubt it's anything like that causing poor gas mileage.
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Mar 22, 2015 01:41
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Fucknag posted:I think he's expecting the positions to read 0 and 100%, which will never be the case. Thanks everyone, I'll stop worrying about it then. why can't all cars be exactly the same
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Mar 22, 2015 13:36
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