FIring order for 84 supra

cre · 01-14-2010, 05:26 AM

The MKII's fuel pump check connector, unlike the MKIII, doesn't bypass the ignition switch, EFI fuse, Main EFI relay or the circuit opening relay. These nees to be in known working order and the ignition set to "ON" to use with the FP check connector or the AFM FC switch for a diagnosis.

Do keep in mind that a bad fuel pump may power up and even provide "proper pressure" at very low loads. Checking fuel pressure at high idle and light throttle is a better indication, IMO.

Here's the TSRM's chapter on diagnosing and servicing the fuel pump:
http://www.cygnusx1.net/Supra/Librar...ection=FI&P=44

01-14-2010, 05:26 AM	#5
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The MKII's fuel pump check connector, unlike the MKIII, doesn't bypass the ignition switch, EFI fuse, Main EFI relay or the circuit opening relay. These nees to be in known working order and the ignition set to "ON" to use with the FP check connector or the AFM FC switch for a diagnosis. Do keep in mind that a bad fuel pump may power up and even provide "proper pressure" at very low loads. Checking fuel pressure at high idle and light throttle is a better indication, IMO. Here's the TSRM's chapter on diagnosing and servicing the fuel pump: http://www.cygnusx1.net/Supra/Librar...ection=FI&P=44 __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->