1999 galant fuel pump and related electrical issues
I have a 1999 galant with a 4cylinder 131k miles. fuel pump went bad i put a new pump in and its still not working... i know its got to be someting electrical obviously but what? i heard it could possibly be the relays but where are they? if anyone could tell me wut the problem might be and where to find it i would greatly apreciate it thanks
Re: 1999 galant fuel pump and related electrical issues
Are you looking for fuel pump relay or fuel pump cut off switch.the
fuel pump relay is under the hood close to the battery(having to be
generic here because depending on the engine size battery could be on
left or right) in a black box with printed nomeclature about what is
inside.(fuses,relays, etc.) fuel pump cut off switch is (if it
has one) usually mounted in trunk,kick panel on passenger side of car.
Easy way to find if if you have owners manual to car it will tell you
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you may have a blown fuse check them first and the relay for the fuel pump just swap it with a new one if those are good spray starting fluid into the throttle body if the car runs the fuel pump went bad if you ran out of gas each time that happened it did damage to the fuel pump because the gas cools off the fuel pump while it operates so on an old car that's 16 years old if it happened a few times in it's life span it did damage each time this also could be just from age related failure but when you get a new pump always keep enough gas in the tank so it will keep the pump cooled off the pump is an electrical motor and they generate heat from operation the gas keeps it cold when the pump gets to hot it has to shut down for safety reasons to avoid an explosion and it fry's itself the other thing that could be wrong is you had a lot of dirt in the tank & the filter is clogged up check all the simple things first before you spend$$$$$$ for a fuel pump
General advice:After warming up track the problem:sparkplugs (even new can have the ceramic parts broken/cracked /wiring (after warming up the isolation get's soft,can loose spark power)/ignition coil(s) (gets hot,stop runnig),running reach,fuel pump/fuel pump relay.Best guess:fuel pump mallfunction (low pressure) related,fuel filter cloged/water in the fuel/fuel line cloged/chipped. Cheers,hope u figure it out,let the people know.
Power to the pump is provided by the relay for the first 3 or 5 seconds to build pressure back up to start. Once the 5 seconds are past, the relay is grounded by the computer IF it sees oil pressure or crank signals. This helps prevent a fire if the car is in a wreck. If it still won't start with the pump relay bypassed, you would check for spark and see if the computer is getting a crank signal.
What you describe is very indicative of timing being off. Its not spark plugs.
Double check your timing and balance belt set up. Its possible to get the timing off enough so the engine starts then the ECU "realizes" that the sensor inputs are very wrong and shuts off the engine.
Is the hydraulic belt tensioner locked down BEFORE you install it? This is required (a large vise or press is required to do this). Once fitted and the tensioner bearing is locked, the lock pin is removed.
A partially obstructed filter can do all kinds of strange things...Since you did run the tank dry, it wouldn't be a bad thing to do if you replaced the filter. They are not terribly expensive and in changing it you have removed that possibility. If after replacing it you still have a problem I'd check the actual fuel pressure as you may have damaged the pump itself....the electric pump depends upon fuel in the tank to keep it from overheating. In a very low or empty tank that can't happen.
my car wont crank, and I dont hear the fuel pump turn on when its in the on position. I have gotten a new fuel pump but it still dont work when it is in the on position nor crank my car. But you can hear the fuel pump when I try to crank the car but when i stop trying to crank it you hear the fuel pump go off. So if you could help me someone, anyone I would be totally happy :) my car is a (2001 Mitsubishi Galant 4cylinder)
check the connector to the fuel pump for corrosion or loose pins, the fuel pumps of newer cars and trucks are designed to last at least 100,000 miles, when the new pumps quit did u verify they had power to them?