Fuel Sending Unit - Page 5 - ZR-1 Net Registry Forums

jss06c6 · 04-25-2018

Put the old sock on the new assembly and installed it. Took the car out for spirited drive. All good. Sending unit working well..[ATTACH]

Sent from my XT1585 using ZR-1 Net Registry mobile app

Johnny5 · 12-10-2021

I just received my 1991 ZR1 and fuel gauge was at 1/2 tank when shipped, I received it with same mileage but tank read 1 or 2 bars. Also i filled up put seafoam and drove a little but my Range still says 19 miles with a full tank. Is this a sign of bad fuel sender? Also
My car is bogging, jerking very bad.
The injectors were replaced but that is it.
Would stuck fuel sender cause this as well?

If I pull the plenum I will do coil packs, plugs, and wires as well but I want try to diagnose why the car os bogging bad and not getting any power. It does it in full power mode and normal. Vacuum pump seems to stop and not run constant.
Anyone experience this and know where to start without pulling the plenum?

mlipmd · 05-20-2022

Measure your fuel pressure, you may have a bad pump or leak in the system.

12-10-2021	#42
Johnny5 Join Date: Nov 2014 Location: New Jersey Posts: 363	Re: Fuel Sending Unit I just received my 1991 ZR1 and fuel gauge was at 1/2 tank when shipped, I received it with same mileage but tank read 1 or 2 bars. Also i filled up put seafoam and drove a little but my Range still says 19 miles with a full tank. Is this a sign of bad fuel sender? Also My car is bogging, jerking very bad. The injectors were replaced but that is it. Would stuck fuel sender cause this as well? If I pull the plenum I will do coil packs, plugs, and wires as well but I want try to diagnose why the car os bogging bad and not getting any power. It does it in full power mode and normal. Vacuum pump seems to stop and not run constant. Anyone experience this and know where to start without pulling the plenum?

05-20-2022	#43
mlipmd Join Date: Mar 2021 Location: Crawfordville, FL Posts: 216	Re: Fuel Sending Unit Measure your fuel pressure, you may have a bad pump or leak in the system.