97 5.7L wont start

9997matt · #1 07-31-2007, 10:29 PM

hey im new, i made this to get help with my truck. I have a 97 5.7l that wont start. Im getting spark and fuel. I replaced the distributer cap and roter and igniton coil. still no luck. fuel pump engages, there is pressure, when i try and start it wont turnover. once every three or four times u can hear a loud pop or air being sucked in through the air box. any help would be greatly appriciated.

taillight · #2 08-01-2007, 09:42 AM

When you say it will not turn over do you meam the engine will not crank or it will not fire?

9997matt · #3 08-01-2007, 06:49 PM

it wont fire

2000CAYukon · #4 08-01-2007, 07:48 PM

Fuel pressure needs to be 60 - 65 PSI to start a Vortec.

What is yours at?

//2000CAYukon

taillight · #5 08-02-2007, 09:23 AM

Try spraying a little carb cleaner in while cranking. If it starts it's a fuel problem. Pull your plugs. If wet your flooded. Try new plugs. Check for spark. Some electric ignitions have problems firing plugs that ar flooded.

9997matt · #6 08-02-2007, 06:21 PM

i tried what u said, sprayed carb cleaner in there no luck, pulled the plugs, they wernt wet,

taillight · #7 08-03-2007, 08:59 AM

Pull all the plugs and crank the engine over to clear out the engine. Put in new plugs.

9997matt · #8 08-07-2007, 08:31 PM

i finally got around to that and it still wont start, i replaced the fuel pump, filter and strainer today just to come to the brick wall that it wont start

taillight · #9 08-08-2007, 09:33 AM

Do you have spark? Pull a plug wire and put it on an old plug and crank the engine.

9997matt · #10 08-08-2007, 05:45 PM

i tried that before i replaced the fuel pump and i have lots of spark,

taillight · #11 08-09-2007, 09:14 AM

You need 3 things to run. Fuel, spark and compression. Do a compression test.

scoobytuff · #12 08-10-2007, 02:12 PM

Is the spark and fuel that you are getting consistant?

trb333333 · #13 08-10-2007, 02:38 PM

When replacing the rotor is it put on correctly. is it possible it is on 180 degrees off. or if the distributor was pulled did it get put back correctly.

also did you put wires on and are they in the correct order and position...

on the cylinders but also on the distributor if not............

young_11_blood · #14 10-02-2007, 10:20 PM

I have the same problem. I have replaced all my sensors as well. Some people have told me that the computer on the vehicle could get jarred or some electrical connections could have loosened

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