Peugeot Boxer Lean Running

Hey, I've got a 2005 Peugeot Boxer with a gasoline engine that's giving me grief. It feels like it's running way too lean. I'm getting reduced power, the check engine light's on, rough running, and it jerks when accelerating. I'm suspecting it could be a defective injector. Anyone else run into this?

4 comment(s)

I had similar symptoms on my Boxer. Have you checked the EGR valve? Sometimes a faulty EGR can cause lean running conditions. Could also be spark plugs or even a dodgy oxygen sensor messing with the air-fuel ratio. What kind of mileage are you at?

Mileage is at 291257 km. I haven't looked at the EGR valve yet, but spark plugs are new. How did you pinpoint the issue on yours? Was it definitely fuel injectors?

It wasn't exactly the same, mine was more persistent at idle. I would still recommend checking the injectors. To be honest, it's a pain to diagnose. After checking a few things myself, I took it to a workshop. They sorted it out after swapping the injectors. Might be worth getting it checked by a pro.

Thanks for the advice! I'll probably take it to a workshop then. Just got a quote of 515€ for injector replacement, which seems fair. Hopefully, that'll sort it.

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