[ford4fun]

I have a 99 WS 3.8 with about 86k miles. Several months ago the CEL came on and mech said it was MAF sensor. Didn't replace since performance not noticeably impaired. Recently, started having some problems. Before engine reaches normal operating temp, engine will shut off or run really rough. At times it wants to surge or jerk. Once engine reaches operating temp, you can be driving at 60mph and it seems as though the engine cuts off for a split second, you feel a jolt, but the engine immediately returns to normal. Other times it drives fine at op temp. Most of the time now when cold, it generally shuts off once or twice.

Took it in to mech. He went ahead and replaced the MAF although he didn't think it was my primary problem. Sure enough, he was right. The CEL continues to come on, but the only reading he gets has to do with a lean condition (don't know what codes).

Sorry for being longwinded, but I've read through a number of posting and can't quite match up my problem with those listed. Maybe someone can relate this to their experience and offer their advice. Since the problem seems to only occur when the vehicle is cold, there is only limited time for the mech to do the testing, so its been very challenging. The mech is not a Ford dealer.

Any help would be greatly appreciated!!!