Faulty Fuel Pump

courtesy of Bob, The Auto Answer Man


Bob,
I have a 1986 Honda Accord Sedan. Everything was fine until one day it just didn't want to turn on. I thought it was out of fuel, but that wasn't the case. It just sounds like it is. I cleaned the injectors and put in some fuel injector cleaner. It turned over and then it died. Could the fuel pump go out just like that or would I get some warning signs? I never had a problem with the car before this.
Juan

Juan,
The easiest way to determine if it is fuel pump related is to install a fuel pressure gauge on the fuel rail. It should read somewhere around 40-45 psi. What generally happens when you turn on the key, is the ECU sends a signal to the fuel pump for about 3-5 seconds to turn on. This basically primes the fuel system and brings it up to operating pressure. In the past, I have seen the system prime fine. Then, the car will start and run for a few seconds until the fuel pressure drops below the minimum. This is because the fuel pump did not turn back on. In most cases, the problem could be traced back to the fuel pump primary circuit.
Good Luck!
Drive Safely!
Bob, The Auto Answer Man


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