Thoughts on leaky fuel injector
 

Replaced MAF last weekend but sputtering on ignition and at idle still isn't fixed. Very very pissed this wasn't addressed and I have to go back to the dealership.

I'm thinking a leaky fuel injector or a bad fuel filter. Rough starts, decreasing gas mileage, rough idles.

What do you guys think? I hope my dealership is capable of fixing this

IMO I would bet it is a bad IAC valve (assuming we have one on the cars which I'm sure we do).

More likely to be that than a leaking injector but anything is possible. Can you smell gas?

Not to my knowledge I can't smell gas. But fuel pressure and filter and injectors may be the problem.

You should have some sort of fault code stored in the ECU. Scan that puppy and find out what the issue is.

BTW, there is no servicable fuel filter on a 370.

I think it needs to get fixed. I had my MAF replaced due to Service engine light. No perfomance issues associated. I certainally hope the dealership is capable.

Sounds as if it could be a Bad Ignition Coil...

Any updates if our cars have an IAF and also what do you guys think about a fuel relay problem