Roaming Idle.

[KezR33]

Hey guys,

Recently my car has started idling unhappily. When fully warmed up it will roam from about 1,100rpm down to 800rpm, back and fourth constantly. The car obviously doesn't like this as the car vibrates quite a bit when it hits a certain frequency. Didn't really phase me too much until today it nearly stalled doing it. Dropped down, sputtered, before roaring back to life.

Car has been serviced regularly, but I recently had to get the throttle position sensor replaced as the car wasn't making its full power. Before working out it was the TPS my mechanic looked at several things including the O2 sensor so I'm wondering if this could be causing the rev changes. I've reset the ECU and that didn't help.

Appreciate any help, cheers.

P.S. I drive a '95 non turbo Supra.

[Nanogrip]

Try and check your MAP sensor, I cleaned out one for a friend who has a Honda Civic. Cured his weird idle problems.