artpfunk Posted April 26, 2009 Report Share Posted April 26, 2009 I bought a 92 deville 4.9 liter and it runs alright but I did the OBD and got E55 code Closed Throttle Angle Out of Range so what does that mean and what do I need to do to check it/fix it and is it important enough to that I shouldn't drive the car until I fix it? Link to comment Share on other sites More sharing options...
Ranger Posted April 26, 2009 Report Share Posted April 26, 2009 I think it means that the TPS (Throttle Position Sensor) is reading the throttle position to be at closed throttle, but the RPM is to high to be at closed throttle. Link to comment Share on other sites More sharing options...
artpfunk Posted April 26, 2009 Author Report Share Posted April 26, 2009 Ok do you know what I should do about that? Link to comment Share on other sites More sharing options...
Ranger Posted April 27, 2009 Report Share Posted April 27, 2009 IF your idle RPM IS where it should be (aprox. 650) then I would probably change the TPS. Link to comment Share on other sites More sharing options...
artpfunk Posted April 27, 2009 Author Report Share Posted April 27, 2009 Well ok then thank you for the help. Link to comment Share on other sites More sharing options...
forklifttech Posted April 27, 2009 Report Share Posted April 27, 2009 Well ok then thank you for the help. Art, Ranger is right but I would also check and see if cleaning the throttle body and plate helps. The sensor is aloud a certain ammount of play and if the plate is sticking it can exceed that range and set the code. Link to comment Share on other sites More sharing options...
artpfunk Posted April 27, 2009 Author Report Share Posted April 27, 2009 Thanks I will look into that too, now I just need pictures of all this stuff so I can have a better idea on what it should look like. Link to comment Share on other sites More sharing options...
forklifttech Posted April 30, 2009 Report Share Posted April 30, 2009 Thanks I will look into that too, now I just need pictures of all this stuff so I can have a better idea on what it should look like. Unfortunally I don't have a scanner or I would post them for you. But, you can pick up a Haynes manual at just about any parts store for about $20. While the info in them isn't that helpful it does provide decent pics. Other than that the throttle position sensor is located on the throttle body assembly which is at the end of the air intake tube on the engine. If you take the tube off you can easily see inside it. If there is any sort of black/brown substance inside I would suggest cleaning it off and then clear the code. If that does not fix it then I would start looking at the sensor and wiring. Link to comment Share on other sites More sharing options...
artpfunk Posted May 8, 2009 Author Report Share Posted May 8, 2009 I checked the RPM and it was at 850 but I couldn't adjust the screw to turn it down, is there a special tool I need or is it just stuck. It seemed like if I put any more pressure on it that I was going to break something so I quit trying Link to comment Share on other sites More sharing options...
Ranger Posted May 8, 2009 Report Share Posted May 8, 2009 Idle speed is controlled by the PCM. Press on the ISC motor plunger. It should retract. When it bottoms out, pull the plug. Now adjust the plunger to a .060 gap with the throttle and leave it alone. Link to comment Share on other sites More sharing options...
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