Not holding idle

Dr-Rotor · 08-10-2008, 02:31 AM

Hmmmm.....interesting problem.

Since you have a PFC...do you have a hand controller? We can start by checking your TPS is at the right voltage. If you have a hand controller, go to the ECT screen then sensors....top left in the list of sensors you will see 3 or 4 abreviated things....the 2nd one down is the 1st TPS. It dose not say TPS but it is. Next to it there will be a number. This number is the voltage & it needs to be between 0.75 & 1.0 with ignition on & the car at operating temp but not running. If your numbers are correct, push the throttle all the way in & check to see the number increases to a 4.??. If the number highlights your TPS is seeing to many volts at full throttle.

So you will need to adjust it a little. The TPS is located behinde the throttle body. Its a black thing with a plug going into it. 1 screw at the top & 1 at the bottom. You will need a 90deg ratchet setup with a flathead drive. Once you loosen the TPS it can rotate, this will adjust the voltage. Get your wife or a friend to sit in the car & tell you if the numbers go up or down. Depending on what your problem is. IE: If your numbers are to high or low at temp with just the ignition on then adjust till you are in the range of 0.74 to 1.00. After that check you max by pushing the throttle in all the way...if the number highlights then you will need to lower the voltage untill it dose not.

This TPS voltage thing is some times the reason for not holding an idle after backing off the gas. I dont know why your car will not rev past 3k. When you shorted the airpump wires you may have blown & sensor and put the car into one of its limp modes that are designed to protect it. You will need the manual to figure out what sensor you have blown.

If it makes the escaping air noise when you have the airpump in that will be because the air it is blowing dose not go to a cat like it used to. That will be the noise you hear when it shuts off. The pump works at idel speeds.

08-10-2008, 02:31 AM	#2
Dr-Rotor Rotary Fan in Training Join Date: Aug 2008 Location: Auckland Posts: 70 Rep Power: 18	Hmmmm.....interesting problem. Since you have a PFC...do you have a hand controller? We can start by checking your TPS is at the right voltage. If you have a hand controller, go to the ECT screen then sensors....top left in the list of sensors you will see 3 or 4 abreviated things....the 2nd one down is the 1st TPS. It dose not say TPS but it is. Next to it there will be a number. This number is the voltage & it needs to be between 0.75 & 1.0 with ignition on & the car at operating temp but not running. If your numbers are correct, push the throttle all the way in & check to see the number increases to a 4.??. If the number highlights your TPS is seeing to many volts at full throttle. So you will need to adjust it a little. The TPS is located behinde the throttle body. Its a black thing with a plug going into it. 1 screw at the top & 1 at the bottom. You will need a 90deg ratchet setup with a flathead drive. Once you loosen the TPS it can rotate, this will adjust the voltage. Get your wife or a friend to sit in the car & tell you if the numbers go up or down. Depending on what your problem is. IE: If your numbers are to high or low at temp with just the ignition on then adjust till you are in the range of 0.74 to 1.00. After that check you max by pushing the throttle in all the way...if the number highlights then you will need to lower the voltage untill it dose not. This TPS voltage thing is some times the reason for not holding an idle after backing off the gas. I dont know why your car will not rev past 3k. When you shorted the airpump wires you may have blown & sensor and put the car into one of its limp modes that are designed to protect it. You will need the manual to figure out what sensor you have blown. If it makes the escaping air noise when you have the airpump in that will be because the air it is blowing dose not go to a cat like it used to. That will be the noise you hear when it shuts off. The pump works at idel speeds.