Engine will not turn over or start when in park with key on.
I have ask this question before and received helpful advice but now I have narrowed it down. I have been told that if the safety neutral switch is bad, the gear shift will move from park to the other gears without having your foot on the brake pedal. This is not the case with my problem. The gear shift will not move out of park until I push on the brake pedal.
After I turn on the key, depress the brake pedal and then move the shifter through all the gears and back to neutral, the engine will start.
Does this mean that there is a problem with the linkage. If so how complicated is the linkage fix.
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Re: Engine will not turn over or start when in park with...
You linkage is working properly it sounds like, especially if the indicator for "D, R, N", etc are lining up. However the linkage or the neutral safety switch may need to be adjusted. More than likely, it's your neutral safety switch.
The brake pedal release has nothing to do with the neutral safety switch when switching gears.
The brake pedal release is just a safety to prevent you from pushing the gear shifter accidentally. Actually, you should be able to start the truck without holding the brakes.
If the neutral safety switch is bad or misaligned, it'll do exactly what you're describing. If pulling it down in neutral starts the truck, then that's a sure indicator.
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Could be a number of thing's , can you do automotive electrical testing ? Do you know if starting is PCM / ECM controlled or BCM controlled ? Do you know what these are ? BCM - body control module , PCM/ECM - engine computer !
Moving the ignition switch to the START position sends a 12-volt signal to the engine control module (ECM)/powertrain control module (PCM) Crank Request circuit. The ECM/PCM verifies that the transmission is in the PARK or NEUTRAL position. With the transmission in Park, voltage flows through the Park/Neutral position switch and feeds the starter relay coil. The PCM then grounds the control circuit of the starter relay. When the starter relay is energized it allows battery positive voltage to the starter solenoid S terminal. On some vehicles the starter will continue to crank the engine with the key released until it starts or the crank command has timed out to prevent excessive heat build up in the starter circuitry or the ECM/PCM receives an engine run flag.
Circuit Description (BCM Controlled)
Moving the ignition to the START position signals the body control module (BCM) that engine crank has been requested. The BCM verifies that theft is not active and sends a serial data message to the powertrain control module (PCM) requesting engine start. The BCM also energizes the RUN/CRANK RELAY. When the RUN/CRANK RELAY switch side closes, and the vehicle is in Park or Neutral or with the clutch is fully depressed, if equipped, supplies voltage to the starter relay coil. The PCM verifies the transmission is in Park or Neutral and the clutch is fully depressed, if equipped. The PCM will then ground the control circuit of the starter relay, closing the switch supplying voltage to the starter solenoid. On some vehicles the starter will continue to crank the engine with the key released until it starts of the crank command has timed out to prevent excessive heat build up in the starter circuitry or the PCM receives an engine run flag.
Do you know what a park neutral safety switch is ? What do you mean key stuck in ignition ? Can't turn the key to off position , or you can an the key will not come out ?
Your best bet , take it to a qualified repair shop .
Depending on how long the vehicle has been parked your battery could be dead. If it makes no noises when you try and turn the key then your battery is not pumping enough power into the starter to get it to turn over. There could be many issues. Try and ask again with more details.
Ensure vehicle is on level ground first!
Open bonnet, put in gear, take hand brake off and rock vehicle back and forth whilst watching belts or something like the alternator to see if this turns. If not there is a chance you siezed the engine when it overheated.
Bad MAF (Mass Air Flow) Sensor - can cause erratic idling and stalling
Bad EGR (Exhaust Gas Recirculator) valve - erratic idling, skipping
Bad TPS (Throttle Position Sensor) controls idle under different conditions ie cold, hot, ac etc
Your problem may be any 1 of the 3 or a combination. Best advice is to get a free diagnostic test done (most chain auto parts stores will do this test free) and come back with the error codes, These codes will help to narrow down where the exact problem lies.
Hello csdunne: My name is Roger and I will answer your question. The oxygen sensor will not cause a no start condition. How ever the fuel pump will. You need to test the fuel pressure. Whether you have a 4x4 or 4x2 the pressures are the same. Key on engine off. a 4.3 W engine should have 60-66 psi. A 4.3 X engine will have 55-60 psi. I would also check the fuel filter. A dirty fuel filter will cause low fuel pressure. If the pressure is below the min. by just a few pounds the engine would not start. Should you need further help please just ask. Please rate the answer you received. Thank You for using Fix Ya. Roger
there is a harness that feeds the ignition remove your steering wheel cover and you will see about a dozen wires going into a clip that is attached to the back of the steering wheel , those wires give way and are not making contact reach in to the back and pull the harness forward and then try and push each wire back into the clip try this and see if it works it solved my problem basicly it is just a loose wire in the harness,,