S2000 Under The Hood S2000 Technical and Mechanical discussions.

Lose some acceleration after 75% throttle

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Old 07-29-2016, 03:00 PM
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Default Lose some acceleration after 75% throttle

If slowly I push down the throttle it pulls hard up until about 75℅ of the action on the accelerator is used. If I exceed 75℅ throttle then I have a sharp and noticeable loss in pull by about 25℅. This happens regardless of rpms. Goes away on long drives and comes back after the car sits for awhile.
Old 07-29-2016, 03:04 PM
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Check your spark plugs. Post pics.
Old 07-30-2016, 06:31 AM
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I had an issue with RPM and it was spark plug about 10 years ago.. i assume yours is AP1 so check throttle cable tension as well.
Old 07-30-2016, 11:41 PM
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Any thing you might want to look into is the throttle position sensor. If the TPS is not reading correctly you can lose power..
Old 07-31-2016, 07:24 PM
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No pictures to post, but I replaced the sparkplugs. The issue still exists.
Old 07-31-2016, 07:28 PM
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Just to clarify mine is an 02 AP1.
Old 07-31-2016, 07:53 PM
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Originally Posted by acklavidian
No pictures to post, but I replaced the sparkplugs. The issue still exists.
The issue screams TPS. Use a code scanner and make sure the throttle percentage increases linearly as the pedal goes down.
Old 08-01-2016, 08:50 AM
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Use a code scanner and make sure the throttle percentage increases linearly as the pedal goes down.
A code scanner can do this?
... or rather, a auto parts store code scanner can do this?
Old 08-01-2016, 08:57 AM
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Originally Posted by acklavidian
Use a code scanner and make sure the throttle percentage increases linearly as the pedal goes down.
A code scanner can do this?
... or rather, a auto parts store code scanner can do this?
I use a generic OBD2 code scanner/diagnostic tool. You should get the same features with any OBD2 reader. I'm not sure if an auto parts store can or will do anything besides read codes. Check out Bluetooth adapters which you can use with the torque app.
Old 08-01-2016, 10:59 AM
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Any suggestions on wireless OBD2 adapters for the torque app?


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