Please help with 98 Tahoe

[briansw6]

2 weeks ago I drove the truck to work but that night it wouldn't start, even with a jump. I was told the fuel pump was going out so in the last 2 weeks i have changed the fuel pump, fuel filter, fuel pressure regulator and new plugs and wires.

It still wont start. Any suggestions? Only other thing I can think of is the injectors. I run sea foam through it.

 

[lesterl]

So it cranks but wont fire? Have you sprayed some carb cleaner into the intake while cranking? This will point us towards fuel or away from it.

If it wont fire on the carb cleaner, then suspect ignition or compression.

If it does fire on carb cleaner, then check fuel pressure, 12v to injectors, PCM, MAF sensor, etc...

 

[samotahoe]

could be cam or crank sensor, need to see if there is any signal to the injectors

 

[Tahoebuzz]

I just replaced my fuel pump on 99 tahoe, only cost me 45 bucks new off ebay. But besides the point...
I know if you spray a lil gas in the air intank that could help you narrow it down.
Also has it ever had a check engine light on? If so do you know the codes?
I know the crank shaft position sensor has has caused another one of my cars not to start before and it threw a code for missfire, crankshaft position sensor, and maps sensor. I replaced the Crankshaft position sensor which only took maybe 15min and it cranked right up and his been driving swell for a year now