Yaris acceleration and stalling issue after clutch replacement
We had a new clutch put into our 2006 Manual Yaris YR about 6 weeks ago. Since then we have had intermittent acceleration issues after the car has been driven and the engine is warmed up. Take off at traffic light at times has been very slow with car attaining 11-12kmsph for 30-40 metres before accelerating properly. We also notice it tends to stall when stopped unless we pump the accelerator. The problem doesn't show up on short 2-4km drives only after its been driven some distance and quite warm. Its scary. A retired mechanic friend suggests it could be due to damage to Vacuum pipes or intake throttle box when the clutch was installed or fuel filter. The RAC mechanics who fitted the new clutch said they cant find anything wrong despite us returning it 3 times. The first time some adjustment was made but as hubby drove away a red warning engine light came on . He took it straight back and they switched it off and left it at that. Ran a bit better but problem still occurs intermittently. When I took it back again they said nothing was wrong despite the issue recurring . Help any suggestions appreciated as it feels unsafe to drive.