Sounds like timing

[wstefanko]

Hi all, I have a 99 tahoe that was running fine a few days ago. I went to start it the other day and it cranks but sounds out of time(will not start) I borrowed a code scanner and no codes. I have replaced the crank sensor and cam sensor with no help since they were the easiest. This is what I did in the summer for reference. New plugs, wires, cap, rotor and coil.

I am getting fuel and spark but no running.

Any thoughts?

Thank you and Merry Christmas.

 

[lesterl]

What is fuel pressure?

How hot is the spark at #1 plug (color of spark)?

Last time a tune up was done?

How clean was the gas?

 

[wstefanko]

Tune up was done in July of this year. I get the gas from the same place for my car also(Phillips 66). Fuel pump was replace last year with a Delco. I will check the pressure and spark later. It is currently 5 degrees outside.
Thank you

 

[wstefanko]

Checked pressure. With key on it went to about 10psi. I then cranked the motor and went up to 60psi and then stayed at 55psi.

I pulled a few plugs and they have oil deposits on them. I am thinking this is not a very good sign.

 

[lesterl]

Dry oil, or slimey fresh oil?

 

[wstefanko]

It is fresh. Also a lot of what looks to be burnt oil.

 

[lesterl]

Shure it is oil? Does it smell like gas? PCV bad? Intake Gaskets? Oil control rings?

If it smells like gas, how long does fuel system hold pressure after key off? Could be a bad FPR in the spider assembly.