High Idle/Stuck Accelator after Fuel Filter Change

[mikeso_81]

Hi,

I just changed my fuel filter and now I am having issues with the idle/accelator. When I get the car going to a speed of 40mph for example, I let off the gas and the speed barely drops. Then when I went down a side street about 20 mph, I let off the gas and the car just kept going. The idle was initally high, but then dropped down to it's normal 800rpm.

The only thing I touched under the hood was releasing the pressure from the fuel pressure regulator before the fuel filter change. I just removed the idle control unit and cleaned it but that didn't help.

Thoughts?

2001 Pontiac Grand Prix GT/3.8L

[Tech II]

Several possibilities....

Vac leak.....

Sticking throttle plate or throttle cable....

Bad IAC valve....

Any codes set?

[mikeso_81]

The check engine has't come on, but I'm going to borrow a scanner from a friend and check for a vaccum leak this weekend. I ordered a IAC just in case. Let's see if any of that helps. I'll reply once I try these things out.