Engine wont start!!!!!

This sounds like the crankshaft angle sensor needs to be replaced but to be sure here is a guide we can use to pinpoint the problem.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.

I checked the fuel pressure with the gauge. The gauge read 40-45 psi. It couldn't be the fuel pump if the sparkplugs aren't firing.

Are you saying that you do not have fire?

No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it

Just picked up a 1999 Grand prix GT.It wont start, was told by previous owner that starter was bad ,I had the starter checked, was told it was good, I was also told the Ignition switch/lock cylinder was bad and replaced it, when I try to start the car the dash lights work, but every thing else does not, no head lights .ect .the starter just clicks, and no power any where. any help would be great.

Check to make sure the battery is good. If you only get one click from the starter, it does sound bad. I would remove it and have it bench tested, but not until the battery and all connections are checked.

Thanks The battery is new and was also tested, and the starter clicks 4 to 5 times ,I am thinking maybe the netural safty switch or elec, switch in steering column. would a obii scan test indicate if these switchs are working

It sounds like either a bad starter or a weak connection. The clicking usually indicates a weak battery. Since it is new, I would be looking for bad connections or corrosion. Even a loose battery terminal can cause it. How was the starter tested?

IT was bench tested at an autozone. battery is about two weeks old. we also ck and cleaned battery terminals and all connections at the starter, and cleaned mounting surfaces of block and starter to make sure there was a good ground.

That is interesting. If you are getting clicking, then the starter is getting power. Do me a favor. Have a helper turn the key to the start position while you check for voltage to the smaller wire at the starter. You should have 12v. If you do, try running a new ground directly to the battery. If that doesn't help, replace the starter.

Thanks I will try that and post the results in a day or so.Thanks again.

I drove my car the night before and got up the next morning and now it won't start. I changed the fuel pump and all the fuses and relays and it still wont start. I also found some burned wires under my battery and replaced them and still no start. The engine tries to start but will not turnover. I have already spent $300 on this problem and I am becoming desperate for an answer. I have changed the fuel pressure regulator and the mass airflow sensor and I have no fuel pressure. If anyone could help I would greatly appreciate it.

Do you hear the fuel pump when key at run position?

You replaced the fuel pump and there's no pressure-check the fuel pressure to rule out the pump and also check for injection pulses.

Let me know

No, I don't hear the fuel pump when I turn the key. I'll check injection pulses. Thanks for tip.

Check the fuel pump fuse and relay

belt broke, replaced belt, now wont start

Maybe the belt hit something when it broke? Do you have a crank sensor around the harmonic balancer? Have a helper crank it while you visually check for spark at the plugs. If that checks out, use a gage and check fuel pressure. Do you have compression, although my info shows that belt to be accessory belt, not valve timing.

checked fuses, has no spark. still has fuel pressure

Some fuel pressure may not mean much, if that is the initial prime? Post the vin, please. I'm not sure of engine litre size?

Engine Mechanical problem
1999 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic

After sitting overnight our gt won't start. we had to buy a brand new battery thinking the old one was bad, apparently we were wrong. we put the brand new battery in it and after a week the problems started again. my husband goes to start it to go to work and nothing. what can be wrong with our car?

Pick your symptom:And get back with some result.

Cranks but no start condition:

Fuel and Spark:
Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.



No crank at all/nothing/nada:

Could be the starter, starter relay, clutch switch/park and neutral switch and ignition switch assuming the battery and connections are good.

it does it while im driving no matter if im driving in town or on the highway or even the interstate, it mostly does it when i go up hill but it will also do it while im driving on a flat straight road. it also does it when i accelerate to, it doesnt consistantly do it but it will do it a couple of times while im driving, i changed all the fluids but it still does it.

Can any one help me with this?

Do you have a check engine light and when was last tune-up?

Have the exhaust system checked for restriction.Also go herehttps://www.2carpros.com/articles/engine-hesitates and https://www.2carpros.com/articles/engine-surges

Will it shake when its idling

The check engine light is on and the last tune up was 3 months ago.

It doesnt shake while idling.

CEL On-scan the computer for code/s and get back if any with the exact code number not description of problem

i drove the car yesterday it did fine no wierd stuff came outside today started it and there was a grinding noise and the lights to the radio and ful mileage wasent on so i turned the heater n and the lights came on then the car died and now when i turn the keys it clicks and lights go off even with a jumper hooked to it and there is oil at the bottom of motor on the a arms

Is oil level OK?

Remove spark plugs, and see if engine will rotate with starter, if not, try a ratchet and socket on balancer bolt (ign. off).

If engine will not rotate, then it is most likely a mechancal problem, and engine has siezed.

oil level is low but was fine yesterday i wonder if starter could be broke? but if so why would it be grinding while its running then die when i turn the air on?

Could be a broken starter drive, but you want to rotate engine by hand to make sure it is not a bearing in the engine. If it rotates by hand, then remove starter and inspect it and flexplate.

Other Category problem
1999 Pontiac Grand Prix V6 Front Wheel Drive Automatic 160000 miles
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it is the coldest its been outside since ive purchased my car (about 5 months ago)...it was running complete fine, untill i tried to start it after having it parked and turned off for about 20 minutes. it simply wouldn't start. The radio, heater and everything worked fine but it just wouldnt engage. Someone's dad helped me, and he kept revving the engine untill he heard it "clear up." i then drove about 10 or 15 miles with no problems. When i tried to start it again, it did the same thing but i couldnt get it to start by giving it gas. i bought a bottle of heet to put in since it is extrmely cold here, and i let it set over night. i turned my car on the next day, and let it sit for about 3 minutes. the rpm needle was shaking a little from about 100 to 120 in the idle mode. the car was shaking a little and didn't sound right. eventually, the check engine light came on and it shut off. it hasnt been able to start since. please help!!

have somene check the crank sensor.. this happened to my 1999 Pontiac Grand Prix GT with 42000 on it, since then its been perfect.. Now my car has 115000 and it.. hopefully this will help ya

The car cranks but would not start. The fuel gauge registers a full tank of gas but shortly before the car stalled, the gauge was at half-tank. The fuel pump activates, but only if it is jumped. There is power going to the ecm and from the ecm

There is spark and the injectors are giving a pulse,, the coils were changed,

[quote:1bd5e6250c="jarplumb"]Electrical problem
1999 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic 234,00 miles
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The car cranks but would not start. The fuel gauge registers a full tank of gas but shortly before the car stalled, the gauge was at half-tank. The fuel pump activates, but only if it is jumped. There is power going to the ecm and from the ecm

There is spark and the injectors are giving a pulse,, the coils were changed,[/quote:1bd5e6250c]

do you have a security light flashing when key on or cranking
if so leave key on for about ten min until security light stop blinking turn key off and try to start if it s blinking u may have to do 10 min key on
it may take 3 times
check fuses and relays
good luck

did a scan on my 1999 grand prix 3.8l and po300 code came up, says random/multiple cylinder missfire detected. where do i start/ check first.

P0300 random misfires normally means vacuum leaks and bad fuel

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel

New fuel pump pressure good,new fuel pump regulator,spark good. refernce volt good at map sensor.By all accounts vehicle should start. 12 volts at injector when key turned on. Checked injectors before installing this set. Car caught on fire 1 year ago replaced harness and replaced fuse box . Scratching my head over this one.

The basics, if it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs, if spark everywhere, use a gage and check proper fuel pressure, you didn't list a pressure spec. Check for fuel injector pulse, that means voltage and ground. If no ground, you need to check rpm signal and possibly your security system.

Check for applicable trouble codes. To check codes yourself, at the least, you need an obd2 code reader.

Placed key in ignition and it will turn only so far but will not start car. When trying to remove key it will turn back only so far and will not release, it stays stuck in ignition and battery power has been turned off for the entire car. This has been going on for the last couple of weeks. In the past I could play the key back and forth and it would work and allow the car to start. Another time I banged on the steering wheel and jarred it and the key would turn to crank car, even slamming the door has produced the key to turn. Now the key is stuck and will not release from ignition. I tried using the spare key in an earlier incident and it had the same results, would not crank car. I suspect the ignition switch has gone bad. Does anyone know of a fix for this problem shot of having switch replaced? This car is not worth sinking a lot of money into due to age and mileage.