I don't have a manual handy to check for this so,I'll ask. On an 04 mustang gt 4.6 2v with the returnless style fuel system, there is a little,round,shinny metal diaphram looking thing inline just before the fuel line attaches to the rail. There are no vacuum lines or electrical connectors. Is this a fuel filter, some type or fuel pressure controller/limiter? or is this something to keep the fuel from running backwards??
What is this??
- Thread starter 71-73modstangs
- Start date
wmburns
SN Certified Technician
It is a fuel pressure damper. It's purpose is to even out the back pulses from the fuel injectors open/closing. This controls NVH and protects the fuel pump. Most importantly it helps the fuel pressure sensor read more accurately.
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