High RPM, low MPH

ONLY for ADVANCED technical discussion about the 240sx!
verrueckterdeutscher
Posts: 2
Joined: Wed Jan 13, 2010 9:08 pm
Car: 1989 240sx

Post

Hey guys I need some help here! i have a 89 240sx and its giving me trouble with acceleration. I start my engine and warm up my car as it is cold here. but when i put it into drive the RPM is higher than the MPH for acceleration. it is around 3, 3.5 - 4 RPM at 25-30mph!! what could be causing this????thanks for any information and help!

Verrueckter Deutscher


bruinbear714
Posts: 1159
Joined: Thu Sep 05, 2002 9:58 pm
Contact:

Post

Auto I assume? First place to check is the TPS. Make sure it is outputting the right voltage as you depress the gas pedal.

verrueckterdeutscher
Posts: 2
Joined: Wed Jan 13, 2010 9:08 pm
Car: 1989 240sx

Post

yes it is an automatic transmission. How to i go about checking the TPS? im not very mechanically inclined.


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