Engine will not start?

When you turn the key to the on position without cranking the engine over can you hear the fuel pump run in the tank for 5 seconds?

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

Please run down this guide and report back.

I just changed engines as the old one was worn out. All sensors and vacuum lines are plugged in. The engine turns over has good spark and fuel. Injectors have power that pulses at 2.5 volts. I am now scratching my head. It is a 3.3 L. Anyone got any ideas to try.
Thanks Pete

Try this

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump and listen to the injector/s are they pulsing.

Fuel pump and Injector/s checks out-start checking the ignition system-power to coil, coil/s itself,distributor pick-up,control module, Cam and Crankshaft sensors.

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time

It will run with brake clean into air intake and timing marks where good when installing new engine. compression is 185 in all 6 clyinders.

Test the fuel pressure,Check injector's resistances and hook up a noid light to injector harness to check for pulses

Engine Mechanical problem
1993 Pontiac Grand Am 6 cyl Front Wheel Drive Automatic

My 93 Pontiac Grand Am V6 120,000 miles will not start and it backfires when i try to start it the fuel pump is working fine all my fuel filters are clean. One day I was driving it and out of no where it starts running rough i pulled over to try to get it started again and it wouldn't start so I left it there and two hours later i got in it and tryed to start it again and it was still having trouble starting but i kept it reved up and i drove it home it was blowing white and black smoke out of the tailpipe and then it started running fine again for a day and all the sudden it started running like that again but now it wont start at all and it backfires Can you tell me what may be wrong with it?

Check if its a fuel or spark problem-do below

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine -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

Cranks but won't start. Check for spark, none. Replaced the ignition control module, same result. Plenty of fuel. checked all fuses, all good.
Tried to find a wiring to be able to check voltage at the harness going into the wiring harness but have not been able to locate one.

Try checking the crankshaft position sesnor.

can I check that with a vom or do I need the special tester?
I have no problem making a donation

Yes a DVOM

1993 Pontiac Grand Am 4 cyl Front Wheel Drive Automatic

my car died while i was driving, and when i tried to start it, it started but the gas pedal pushed itself and revved the engine and i turned it off. then it wouldn't start anymore. i changed the fuel filter, the spark plugs, and the air filter. now it starts but as soon as you touch the gas, it dies.

Hello, maybe the iac system caused the surge in idle? Are there any codes? How is the fuel pressure?

i don't know how to check the fuel pressure. what is iac?

As far as checking the fuel pressure, if there is a schrader valve on the fuel rail, the gage fitting goes there, if no schrader valve, you tee the gage into the supply line, just make sure there is no pressure before taking any lines loose. The iac is idle air control, I was just speculating, it doesn't make sense that the throttle valve would move by itself. You might also check the throttle position sensor, I wouldn't replace anything without being sure. I'd check trouble-codes, your obd 1, you should be able to check codes yourself.

To check codes, place a jumper between the A & B terminals of the data link connector, turn key, just till dash lites come on, no further, then the cel starts flashing, you count the flashes to get the codes, if there are any.

1993 Pontiac Grand Am. Wife took car to store went in for 15 min. came out and car wouldn't start. It had a 1/4 tank of fuel when I got there. I put 1 gallon in it. It started and sputtered all the way to gas station where I filled it up took 13.5 gallons total.(including what I put in at store) It continues to stall and sputter constantly now. It has never had issues in the past.

I replaced the ICM and the coil housing and boots, spark plugs too. Coils tested at 5.71 a piece. Did not replace them. Still can't get this car started what should I try next? Anything please?

Id check for any vacuum lines that may have a slit, crack, or puncture in them. If all them come back good then try taking the Idle Air Control Sensor out (loacted on throttle body) and spray the spring end with throttle body cleaner and wipe it down the best you can. If it dont fix it but it runs better then you will have to replace the IAC which can cost in the upwards of 90, so try to clean it to the best you possibly can to avoid that cost. Check you oil to see if there is antifreeze in it (should have a green tint on dipstick in light if is) and/ or check around where the cylinder head and the block meet for oil coming out of the head gasket. If so your compression may be low due to a bad head gasket or warped head. Hope this helps and good luck!

car wont start replased coil housing plugs & boots how do i check for spark

get a spark tester and put it in one spark plug boot at a time and make sure the clamps on a good clean engine ground, ahve someone crank the vehicle and you observe the spark.

shoudl be bright, blue and well defined.

let me know what you find.