Question about Cars & Trucks
You may want to check your relays for a fuel pump relay, because if you are getting some power but not all, it may be due to a bad Relay. It would be tough to distinguish which wire would be the power for the fuel pump unless you remove it to go off of, to see which terminals powers the pump (+/-) and which ones are for the sending unit. A wiring diagram of the car would be nice to have to show you, It's almost safe to assume that in the plug the "thicker" wires are going to be your power, while the thinner ones are for your sending unit (guage). Check Relays FIRST, then assume that it's the pump, because very rarely do the wires go bad, unless you were in an accident or off roading with it.
Posted on Oct 12, 2013
Not sure what you are using as a ground when checking voltage. If you check at the connector you should have 12 volts at the blue wire with the red stripe (red prong on volt meter) and you can check putting the ground/black prong on your volt meter on either one of the black wires on the connector. When turning the key just to the on position you\'re only going to get full power for about 2 seconds unless you\'re turning the engine over. If you\'re not getting full voltage try putting the black prong (leaving the red one from meter on the terminal that has the blue wire with the red stripe) using a good ground on the body of the vehicle (the black prong from meter). Now if you\'re getting the voltage you need then you need to trace the black wire(s) to where they are grounded out on the vehicle and clean/tighten and repair the ground as well as making sure you are getting zero continuity from where the ground is on the body to the connector at the fuel pump. A bad ground will cause weak power. These are also the 2 wires you need to apply direct power (on the pump side of the connector) in order to check the pump as you asked. Since there are 2 black wires at the connector, if you have direct power to the blue and red wire and put your ground on one of the black wires and it doesn\'t run, than try using the other black wire (or where it would be on the terminal of the connector...pump side) at the connector because that would mean you are testing the wrong ground wire for the pump itself. If your ground is good down there and it turns on when applying direct power than it could be a number of things but the 2 most common would be the fuel pump relay or the air flow meter/sensor. Start with check power and ground and direct powerfirst. If the pump is working when putting direct power and your grounds are good then further testing needs to be done of course. I\'ll be happy to help you with further testing if needed like checking the relay and/or air flow meter. You will need an ohm meter for further testing. I hope I was detailed enough for you to understand the testing needed at this point and I hope I was able to help
Posted on Oct 12, 2013
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Posted on Jan 02, 2017
OPEN THE DISTRIBUTOR CAP AND THE SMALL SCREW THAT
HOLD THE ROTOR FALL OFF TO THE GROUND.
REINSTALLED THE ROTOR AND RETIGHED SCREW, AND TRY IT
AND START LIKE NEW AGAIN . THANK YOU MARTIN D.
Posted on Aug 11, 2009
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