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Not sure what your meaning of why need to reset the computer, the alternator has nothing to do with a check engine light so if that is the issue with check engine light need to scan vehicle find what code is fix that if what to know how to dead boot computer 1.pull + battery cable leave off 2. Get in vehicle turn lights on yes I know there not going to come on we are draining the capacitors in computer 3. Leave light switch on depress brake several times 4. Insert ignition key turn like cranking vehicle couple times. 5. Turn everything off lights key an reinstall + battery cable start vehicle check engine light should be off. Basically that is a dead boot for computer draining all power for it.
Hi Tammy, does you vehicle have any lights lit on the Dash, check engine light etc... You need to see if you have battery + voltage at the coils , an to see if the PCM is turning them on an off ! PCM - is the engine control module . An see if there is an input signal from the crankshaft position sensor . It would also be good to hook-up a scan tool to see if it can communicate with the PCM . Mite have a shorted 5volt reference circuit . Do you have 2.4 L 4 cylinder or 3.0L V-6 ? IF you have the 2.4 L 4 cylinder you need to Check for B+ on the Black/White wire at pin 4 in the connector at the ignition failure sensor with the key on. Jumper the Black/White wire at pin 4 to the wire at pin 3 at the ignition failure sensor connector. If spark is present now, replace the ignition failure sensor. Unplug the Crankshaft Position (CKP) sensor connector. Check for 5 volts on the Green/Red wire. Reconnect the CKP sensor connector. Check the Black wire for a good ground. Check for B+ on the Red wire. If the Green/Red wire goes higher when connected to the sensor and cranking the engine, the CKP sensor is faulty. Let me know if you have questions, thanks.
It amazes me how many people jump straight to a bad starter, battery or alternator. They forget that some vehicles like the 2009 galant have a key fob key that has an immobilizer chip in it that will allow the car to crank but not actually start. If the battery is going bad or the chip is going bad itself it would cause intermittent starting as well
1. Check n clean battery cables with a battery brush. Look at both ends, if able.
2. Check battery acid level. Add if needed, get a jump.
3. All OK? Then get a battery load-test done free at a parts store.
I am assuming when you are saying that the vehicle will not turn over, that you mean that it will not start. There is a valve on the fuel rail, which is how the fuel is delivered to the injectors, that looks similar to the valve stem on your tire, this is called a schrader valve. You need to loosen the stem in the valve, and the turn the ignition on and off several times to pressurize the fuel rail. When you start to get fuel out of the schrader valve, you will tighten the stem in the valve. Then your car should start. If you meant that your car will not turn over, as in the starter not engaging, then you need to check your starter relay.
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)
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