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Fuel Systems and Drivability / Re: Quality OE Fuel pumps?
« Last post by Scaryfastatx on October 09, 2026, 09:53:19 am »Yeah, it's mechanical
So 3 Delphi, none of them had an orifice on the return bung, one of them worked for 30-45 minutes before it lost enough pumping capacity due to the full flow return
I didn't notice it didn't have the orifice was missing until I pulled it off
Also noticed the dreaded A stamped on the, so I guess Delphi white labels through Airtex

Pump #2

Pump #3

I ordered a Carter again, has the orifice and truck is back on the road, I'll take 3 years operation Vs 30 minutes any day

So 3 Delphi, none of them had an orifice on the return bung, one of them worked for 30-45 minutes before it lost enough pumping capacity due to the full flow return
I didn't notice it didn't have the orifice was missing until I pulled it off
Also noticed the dreaded A stamped on the, so I guess Delphi white labels through Airtex

Pump #2

Pump #3

I ordered a Carter again, has the orifice and truck is back on the road, I'll take 3 years operation Vs 30 minutes any day


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