1990 Lexus LS 400 "check fuel pump relay ls400" Questions

...when checked with volt meter. so what could be causing the lost of supply voltage to fuel pump ck relay to fuel pump bad fuse, if fuse is fine check that the ground coming off the pump is well ...

...check engine light, no code in memory and no indication prior to it start happening. Checked TPS, MAF, fuel fliter, fuel pump, ECU relay/fuse, fuel flow, air filter, wire bundle in trunk and all the ...

the same issue and have not been able to trace it down.I have checked the ecu,airflow meter,egr,fuel pump it may be in the wiring or a relay although I tried a fuel pump relay.Have you fixed yours yet

...is "running" When you let off the key and the starter disengages the fuel pump will run until the engine stops moving check the fuel filter or the air filter they may be clogged and check fuel ...

...fuel pump is not coming on Number 3 pin @relay sends power to the fuel pump
(green wire), pin 2 (green/red gets grounded by the fuel injection power train computer, pins 1 AND 4 GET POWER THROUGH ...

what! Please HELP! You are on the right track with questioning the fuel pump. Someone would need to check fuel pressure with a gauge when it fails to start. The pump relay or the pump could be failing

...fuel-economy-on-your.html After getting car washed, check engine light is ON and key less entry not working, tried reprogramming. Also car shows fuel pressure? ...

...Check Engine Light (CEL) on? It should light up when the IGN is turned on, before you try to start. If not, the ECU is not powering up. This does not mean the ECU is dead, as there are relays and IGN ...