Questions & Answers for: GMC Safari surging at idle

i have a 1994 gmc safari.It seems to have a smooth idle at times The engine goes from smooth idle to small rough idle.I have replaced fuel pump,plugs and wires,most sensors,adjusted timing,filters. ...

Engine surges intermittently while driving--rate of speed does not affect this problem Any DIY ideas? please check on idling if there is a roughness. if so you will need to check fuel flow,injection ...

...idle quality and tail pipe emissions. Intermittent signals may cause hesitation, stumble and surging. If an IAT sensor failure accompanies an Engine Coolant Temperature (ECT) sensor failure cooling ...

We have replaced the fuel pump,fuel filter,fuel pump relay,spark plug wires ,spark plugs,distributor and now we are having intermittant starting problems, along with pore fuel economy,and engine idles

van surges/vibration when vehicle is idleing you need to change your motor mounts, they aren't that expensive, just the labor. 

1. no service codes 2. engine starts perfect 3. smooth power at all speeds 4. when idling, in park or drive the engine has a cyclical engine surge. The surge rpm is equal to fast idle. The repeating ...