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A26B · 12-28-2014

I think you need to isolate the primary fuel pump by removing the fuse for the secondary fuel pump. The cold readings you observed would be the results for both primary & secondary pumps operating together.

The secondary pump will shut down after coolant temp reaches about 170F ( I forgot the actual number). You did state "stayed there as it warmed up." but actual temp is unknown so the secondary pump may still have been running.

Good news is there is not a significant injector leak.

I have no input on the converter temp, just the fuel pressure test.

I'm sure you will get it resolved.

12-28-2014	#7
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,399	Re: Catalytic converters? I think you need to isolate the primary fuel pump by removing the fuse for the secondary fuel pump. The cold readings you observed would be the results for both primary & secondary pumps operating together. The secondary pump will shut down after coolant temp reaches about 170F ( I forgot the actual number). You did state "stayed there as it warmed up." but actual temp is unknown so the secondary pump may still have been running. Good news is there is not a significant injector leak. I have no input on the converter temp, just the fuel pressure test. I'm sure you will get it resolved. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.