Nedd

Happy holidays

My 2.5TL with 148K on it has started acting strange. when the in idle I can feel the car shake occasionally and when ever the car shakes, you could hear a muffled poh poh sound coming from the exhaust pipes. for some reason turning on the headlights lessens the shaking. if i turn on the car in the morning and the idle rpm is high (above 0.6), there is no problem. The shaking only occurs when the car is warmed up and idle RPM have settled at 0.6. I"ve done the whole seafoam treatment with no improvement. Can anyone help me ???

main70072

Have you change the plugs?

Nedd

I changed the plugs and wires plus a new fuel filter last week but that didn't solve the problem

Go90go

Check the PCV and the fast idle valve. When the car shakes, it's the engine speed dropping and the car misfiring causes the popping. I suggest raising the RPM speed to 650RPMs, too.

~Cheers~

Nedd

Hmm makes sense to me. so you suggest i change the PCV valve and fast idle valves? where can i locate the fast idle valve and how do you raise the RPM speed.

main70072

Refer to the last pic from this post by simm: https://acurazine.com/forums/showpos...70&postcount=7

The fast idle valve is located to the right of the circled item. Play with the throttle cable to see how you would adjust the RPM speed. It shouldn't be too hard.

5alive

I'm having the same concern with my 2.5. Did the fast idle valve or pcv fix the problem?