Engine not running

Yes I did. I'm going to try to adjust the valves using the GM repair manual. I did adjust them using their method, but went 360 again, a quarter turn at a time, and tightened them again! After I adjust them again I'll shoot air into the cylinder and feel or hear for leaks.

Hello again!
Yes. I used new head bolts. I have the same manual as you are showing. I'll let you know when completed.

I've adjusted the valves per the GM repair guide and I now have compression in every cylinder! I've put it all together but will not try to start it until the distributor arrives. Hopefully tomorrow! I believe it will start now as it is cranking more freely and have good compression in all cylinders.
I'll let you know.
Thanks to everyone for the help, it's much appreciated!
Carl P.

I had to go out of town until Thursday. I had bought many new parts during the rebuild, except for the distributor! (My memory must be fading as I get older)! Anyway, it will be waiting there when I get home. I mentioned that I checked after re-adjusting the valves that I had good compression so I'm sure it will start and run great. I'll follow up when I'm done.

I knew I should have looked at the new distributor that was delivered before I went out of town. It was for a 1980's Chevrolet! Anyway, using the old distributor and guessing on timing, I turned the key and it fired right up! No ticking, knocking or backfiring! It sounds like new! Only issue I have is that when I replaced the timing chain, I probably should have dropped the oil pan so that I could have put a lot of gasket sealant where they butt up against each other, because I have an oil leak there (Dammit)! I tried spraying some sealant there but no dice! I'm gonna pull off the fan again so I can get a closer look at the cover to make sure the leak is in fact there. I torqued the timing chain cover to GM specs so that should not be an issue. I am getting a code for the crank position sensor, but I believe that is because the timing is out. It does drive great, though. I need to take it to a garage, because my scanner does not have the Cam retard option, so they will need to set the timing.
Thank you everyone for your help, It was much appreciated.
Carl P

My 99 Yukon has trouble starting. Doesn't matter time, temperature, time since last started. Once it is running, it runs great!
Items replaced so far: throttle positioning sensor, coil, rotor, dist cap, spark plugs.
Most of the time manipulating the gas pedal will help it start. But sometimes it won't start at all. Wait a few hours and it starts right up. I am lost and will appreciate all help.

It could be the fuel pump, sounds like a 92 gmc safari van I had to fix for a friend

Yeah, guess that I forgot to list that. New fuel pump too.

Dont you hate the parts throwing game? It damn sure aint cheap. Have a crank sensor on that truck?

Don't know, I am sure it does. You think this could be the problem? I'll check into it.

Ok, I believe that your right on the fuel pressure regulator. Problem is that I couldn't figure out where it is. Looked all around the manifold by the fuel rails and couldn't find anything. Anyone where to look for this thing and maybe some tips on replacing it?

Thanks

1999 GMC Yukon 5.7 2WD intermittently will not start. After a few hours of sitting it starts again like nothing was wrong. It may perform fine for days, weeks, and months and then fail again only to work again after sitting for hours with no worked performed. The engine turns over just fine but is not getting fuel. In the beginning I changed the fuel pump (three times). But as I changed the fuel pump each time it checked out fine. I have checked all the fuses and they are good. I have changed and checked the fuel pump relay and it is good. Using a wiring diagram I have seen the next component to check that controls the fuel pump is the Vehicle Control Module (VCM). The way I read the wiring diagram I should be able to apply 12V to the 87A socket on the relay board and start the fuel pump prime, is that correct? Am I on the right track? I see literally thousands of post about this issue with 90 model GMCs but have not seen a satisfactory solution.

I am experiencing a similar problem to yours. The truck starts immediately when cold, runs great. Occassionally (every couple of days) the car will fail to start when hot. Allowing 2-4 hours cooldown, it will start right up. Any suggestions? Could this be a fuel pump issue; or would it just stop altogether?