krakoosh
Well-Known Member
I have an '03 5.4. I had to repair the relay in the fuse box but before that the pump was replaced, bad job of troubleshooting for sure. I now have a lean condition and mechanic says he's only getting 38lbs at the rail. The pump has been in since January working just fine. Problems started about 1 month ago with a slight miss that felt like the transmission slipping. It started to take a hair longer to fire up and finally threw PO171 and PO174. Replaced PVC hose assembly. It now takes considerably longer to fire up with PO171 coming back which is why I took it in for a look. He's saying bad pump. Has anyone ever had to replace the pressure regulator? Is that part a works or it doesn't item? I didn't check the pressure after new pump was installed so I can't say what it was at the rail then.
Just wondering if anyone has some idea where to go from here.
Just wondering if anyone has some idea where to go from here.