Question about 1988 Mazda MX-6

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No power at fuel pump checked fuses their good

Fuel pump psi is 72 will start on starting fluid fuel pump comes on when jumped at check port closed off fuel pump reulator on fuel rail still wont start can it be a problem with inj too or mabe computer

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Check for power at the fuel pump relay kdc744

Posted on Feb 08, 2009

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2001 grand marquis not getting power across relays for fuel pump. changed pump, relay, and computer. still nothing


Check fuses #1 #2 #9 #10 #11 #12 in the battery junction box under the hood to make sure they are good

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Did you check for spark at any ot the spark plug wires/ coils? If there is, check for fuel pressure at the fuel rail. Take the port cap off and connect a fuel pressure gauge. If one is not available, with a pocket screw driver deppress valve at port and observe if fuel pours out. If no fuel comes out at all, check your fuel pump circuit. Check for good ground and power at fuel pump connector. If power/ground are ok, replace fuel pump. If spark and good fuel pressure is present, there is the possibility of engine mechanical issues(jumped) timing chain). Also, a plugged catalitic wont let engine start but its very unlikely thats your problem. Start with your basics: spark, fuel, engine mechanical and catalitic.

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When you turn the key to on, not start, do you hear the pump turn on for a couple of seconds to pressurize the fuel system? If you do, check fuel pressure with a gauge, should be over 50 psi if multi port injection, about 20 psi if throttle body injection. If pressure is good, you may need to check the fuel injector circuit.
If no sound from the pump, you will need a voltmeter or a test light to check the fuel pump circuit. First check the fuel pump fuse. Then check for power at the gas tank on the fuel pump wire, when the engine is being cranked over. Power should be going to the pump then. If nothing, move back to the fuel pump relay-need to check for power at the relay.

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I have a 1997 isuzu rodeo 3.2L I've checked the continuity on the fuel pump wires they seem fine. No/low voltage on the wires to the pump, (.08 volts when DMM is set to 20). Checked pump after removing the...


You may want to try to see if the car will start while you spray starting fluid down the throttle body. If it doesn't, the problem may not be the fuel pump at all. There is an idle air control valve bolted to the front of the throttle body that can keep the car from starting as well.

If the car starts with the starting fluid, you might want to change your fuel filter. It's mounted under the car near the passenger rear door.

Mar 06, 2011 | 1997 Isuzu Rodeo

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Got a 1999 gmc jimmy. Wether it is cold outside or warm my truck has difficulty starting when the truck is cold. Got new plugs wires and distributor. Fuel pump is working fine. Once it is running there is...


Common problem with these is a fuel drainback. Use a fuel pump pressure tester, start the engine, If it's multi-port fuel injection the psi should be 50psi+. If 50psi, turn off engine and notice psi drop. If fuel pressure drops off to 10 or 5 psi, try to start engine and watch for a jump in fuel pump pressure. If pressure jumps to 50psi and the engine won't start, then I would suspect a good working fuel pump, if not a jump to 50 psi, I would say bad fuel pump. Good luck, Gary

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1997 GMC Savana 5.7 L conversion van. Cranks but wont start


look under the hood on the right side where your brake fluid is..There is a black box to the farest right of the brake fluid. take off the lid to this box were you will find fuses..Reach in and feel the fuses to see if any are loose.The largest fuses in the front, push down on those and then try to start it up..Take them out look at them make sure there ok if this dont work..they the one bad might need to be replaced..

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Car will not start


you getting sparks; check the basic from fuse and relay. Its seems like you not getting any fuel by having to give it fuel, check the fuel pump see if it working, you can remove it and connect straight to 12v and do a jump. If the fuel pump is good then it will be the crank sensor, crank sensor turn on the fuel pump as long the engine continue turning over. what crank sensor does it sense the crank/flywheel turning and it send single to the computer than computer send power to the fuel pump. sensor tend to go bad over time and heat exposure; the sensor it fairly cheap to replace.

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96s10 starting problems replaced throdle position sensor,fuelpump relay,no start shot of starting fluid fires right up and runs


Check the fuel pressure at the shredder valve. You should have 60psi to 65psi with the fuel pump primed and engine not running. Once the engine has been started, there should be a 5psi drop. Make sure the fuel filter has been replaced and that the fuel pump is making at least 60psi. Anything less or more then 65psi will not activate the fuel injectors, the other thing to is that the spider injection system on the vortec are know to go bad and you may have to replace the system. Good luck and keep me posted, be glad to help you get your S-10 running 100% again. 

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Starting probems on a 1998 kia sportage no power to fuel pump


Easy to test pump. Takes two people. Disconnect fuel line at carburator and hold end in a catch can. Turn over engine. Does fuel come out. Yes, problem is not fuel pump. No, proplem may be pump or might be clogged fuel line or a fuse. rule out fuses first (cheapest) fuse will be labeled fuel pump. Don't jump your fuel pump while it's in the car. OK to jump it on a test bench but in the car full of fuel is a bad combination with sparks....

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