| Re: 91 Corvette Convertible fuel pump issue |
Subject: Re: 91 Corvette Convertible fuel pump issue by BillH on 2013/8/12 3:40:56 Quote:
I checked the 89 fsm and it made no reference the the delay. It said basically once the ignition is turned on the ecm sends a reference signal to the fuel pump relay to energize. It will run for approximately 2 seconds and monitor for injector pulses. If there are no injector pulses, the ecm cuts the signal to the relay. It does say in the flow chart, however, when testing to wait 10 seconds before turning on the ignition between tests. I don't know why, maybe that's what I was thinking of before. [/quote] Same with a LT1 except the ECM monitors the low res. opti pulse. Of course if you then get oil press, it will activate the relay separately from the ECM. |
