Did you check all the fuses under the hood? That's where the ignition fuses would be. The same "run" wire to the ignition coils, when the key is in on or run, or the same set of run wires out of the ignition switch both to the dash warning lights and gauges, and to the ignition system on the engine, well they're all the same power source, and more so the computer gets power from the ignition switch being on as exhibited by the check engine light turning on when key is turned to on.
It sounds like the ignition switch is either not getting full power in, or it's not sending power out as it should.
Check your other battery power-do you have headlights? That would be entirely separate from the ignition switch, but it verifies that battery power is getting to the fuse and relay block under the hood. Is the cranking speed normal? not too slow?
SOURCE: 1999 GMC Jimmy won't start.
firstly where is fuel pump relay as i have never seen a GMC jimmy sorry about that but have you ever seen a foden ?? well the first thing is to check the fuse,if fuse is ok which can be checked by looking at it as its transparent or a piece of wire with a light bulb .across the battery.to find the relay is easy if you dont know where it is,When this piece of americana decides to work just turn ignition on and listen for the click of relay ,then when it doesnt start listen for click again or rather an absence of a click,sounds more like a dodgy pump in the tank or the connections going to it.when it wont start try thumping the fuel tank with the ignition on and if it is a sticky pump you might hear it start then at least you will know where the fault is.Another fault that i have come across with relays is that where the relay is passing a heavy load then its possibe for the contacts to burn inside the relay.When this happens then if it is possible to seperate the relay cover and clean the contacts with a points file (remember them ) or a piece of fine emery paper if the cover breaks taking it apart then use a bit of black insulating tape to repair the cover.Thats assuming the pump is in the tank and not bolted to the chassis near the fuel tank but that design with external pump i havent seen on a europeon car for nearly 20yrs .
SOURCE: Engine won't start. Dash lights flash rapidly when key turned.
the battery says 12 volts but may be dropping to 4 or 5 under a load...i would suggest jumpstarting the car and see what happens.the battery should read in the high 12 volts and not less than 9.5 under cranking. the dash lights go out on your car when starting,and the alarm will go off ,and disable the ignition if the voltage is too low in cranking the car because the computer will shut it down and activate the anti theft.....check your battery posts are tight. best of luck
SOURCE: changed fuel filter now car wont start
Just checking, but did you install it with the arrow pointing to the engine? Take it off and try blowing through it, if you can't then it's plugged up and you need to get another. If you can blow through it, then it's something else.
SOURCE: 2000 Chevy Blazer Wont Start
2000 chevy blazer, fuel pump runs and turns off when presurized, truck turns over and want to start but will not run. Any suggestions?
SOURCE: 2004 chevy cavalier wouldnt start replaced fuel
Check your O2 sensors. They will give that affect and work only when your engine heats up. If the car cools down and starts up again, that is a sign that your O2 sensors are shot. Replace them.
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