Fuel pump.. i think.

redmaro · 08-20-2007, 05:36 AM

Turn the ignition switch on (dont start engine), remove the fuel filler neck cap and push the small trap door, with a pencil or something. Put you ear close to mouth of the fuel filler neck. Have someone bridege terminals +B and Fp on the diagnostic port you should hear a whirring sound as the pump is powered up. If you hear the whine its working if you dont you should check the following:

*EFI fuse 15-amp
*Ignition 7.5-amp fuse or main EFI relay(located in the fuse panel next to battery)
*Fuel Pump
*wiring and electrical connectors

Theres other tests you can perform, but I would do this one first its easier^^

http://www.cygnusx1.net/Supra/Librar....aspx?S=FI&P=1

08-20-2007, 05:36 AM	#4
redmaro walbro fp Join Date: Mar 2006 Location: arizona Posts: 432	Turn the ignition switch on (dont start engine), remove the fuel filler neck cap and push the small trap door, with a pencil or something. Put you ear close to mouth of the fuel filler neck. Have someone bridege terminals +B and Fp on the diagnostic port you should hear a whirring sound as the pump is powered up. If you hear the whine its working if you dont you should check the following: EFI fuse 15-amp Ignition 7.5-amp fuse or main EFI relay(located in the fuse panel next to battery) Fuel Pump wiring and electrical connectors Theres other tests you can perform, but I would do this one first its easier^^ http://www.cygnusx1.net/Supra/Librar....aspx?S=FI&P=1 __________________ MK3, Auto, Turbo.