1999 Ford E-250 Q&A
1999 Ford E-250 Question: What might cause engine shudder at initial throtle opening?
No fault codes set. Intermittantly runs rough on initial throttle opening only. I replaced the coil pack, all the vacuum hoses, ignition wire set, spark plugs, cleaned throttle body. Condition persists. I am thinking maybe a faulty ER valve or TPS, but they're not easy to get to so I'm holding off until I can get other opinions. - Diagnostechs Mobile Service
Any CEL on? That is one of the first things you should tell us. May have a motor mount problem. Was all these parts replaced because you were trying to fix the problem you have stated? - raiderron