Ford Sierra with 2.0 pinto with weber carb, problem is, that now at winter car starts and runs fine, if I press the gas strongly then the idle servo moves all the way out and car idle rpms are really high, like 3 to 4k. Choke is working fine. When I re-start the car, servo moves back in on its own and no problems, till I step on the gas hard again. This problem is only seen when I let the engine be over 4k rpm, like passing etc. If I drive like an old lady changing gears at 2k then servo works ok.
Right now I have disconected the idle servo and manually adjusted its position. Car runs a bit rough, but no problem right now.
Wanted to know: any ideas what could cause such a problem? Bad servo?
Are there any issues with eunning without this servo?
Thank you all in advance!