96' Taurus SE Help Please!
Ryan_Burda
09-30-2008, 04:14 PM
Ok, I dont even know where to start with this one, but I'll give it a shot:
This morning I woke up and got ready to go to the bank. I walked out to my car and started it up, as I started it up it idle'd really rough and almost reached down to 600 rpm's. But I thought nothing of it at the time, so I started driving through the back roads and I started to notice that I was picking up an unusual amount of speed. So I literally let off the accelerator and noted that my car was still accelerating, albeit slowly, but still... not good.
I also had trouble breaking free from its slow acceleration, even when I wanted to give it gas, it would still continue on its slow path.
I got to a stop sign eventually, (got it to stop by applying an abnormally high amount of brakes).
At this sign, out of curiosity, I put it in park... and .. IT SHOT UP TO 4000 RPMS! but thats where it capped out, oddly enough. It was just sitting there revving and fighting this invisible 4000 rpm wall.
Needless to say, I shut it off.
I then had someone come by and look at it, and off the top of their head they disconnected one of the "solenoids?" near the throttle control and it seemed to help, as it only idle'd at around 2500
any thoughts? I know its a lot to read. But any help would be appreciated. :tongue:
This morning I woke up and got ready to go to the bank. I walked out to my car and started it up, as I started it up it idle'd really rough and almost reached down to 600 rpm's. But I thought nothing of it at the time, so I started driving through the back roads and I started to notice that I was picking up an unusual amount of speed. So I literally let off the accelerator and noted that my car was still accelerating, albeit slowly, but still... not good.
I also had trouble breaking free from its slow acceleration, even when I wanted to give it gas, it would still continue on its slow path.
I got to a stop sign eventually, (got it to stop by applying an abnormally high amount of brakes).
At this sign, out of curiosity, I put it in park... and .. IT SHOT UP TO 4000 RPMS! but thats where it capped out, oddly enough. It was just sitting there revving and fighting this invisible 4000 rpm wall.
Needless to say, I shut it off.
I then had someone come by and look at it, and off the top of their head they disconnected one of the "solenoids?" near the throttle control and it seemed to help, as it only idle'd at around 2500
any thoughts? I know its a lot to read. But any help would be appreciated. :tongue:
shorod
09-30-2008, 06:36 PM
Welcome to the forum!
The reason it wouldn't "idle" past 4000 rpms in park is due to the overrev preventer. It's usually in the range of 3000 - 3500 rpms.
I suspect what the helpful person disconnected was the idle air control (IAC) servo which allows air to bypass the throttle plate at idle.
I'd suggest you carefully inspect the intake air tube to make sure it's properly and securely connected. Also, check the throttle linkage for kinks or bends that could prevent it from allowing the throttle plate to fully close. Take a 5/16 inch socket with short extension and wrench with you to remove the air intake hose at the throttle body (one that you just verified was securely connected). Remove it and see if the throttle plate is stuck open part way. If so, you have something causing the throttle plate to bind or not close completely. Make sure the floor mat is not interfering with the accelerator pedal, especially if you have non-OEM floor mats.
-Rod
The reason it wouldn't "idle" past 4000 rpms in park is due to the overrev preventer. It's usually in the range of 3000 - 3500 rpms.
I suspect what the helpful person disconnected was the idle air control (IAC) servo which allows air to bypass the throttle plate at idle.
I'd suggest you carefully inspect the intake air tube to make sure it's properly and securely connected. Also, check the throttle linkage for kinks or bends that could prevent it from allowing the throttle plate to fully close. Take a 5/16 inch socket with short extension and wrench with you to remove the air intake hose at the throttle body (one that you just verified was securely connected). Remove it and see if the throttle plate is stuck open part way. If so, you have something causing the throttle plate to bind or not close completely. Make sure the floor mat is not interfering with the accelerator pedal, especially if you have non-OEM floor mats.
-Rod
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