So I have a 96 f150 4.9l y. Automatic 60k 4wd. So it runs and drives great until you drive it until it warms up and let it set for 20 mins and then try to start. Acts like it is going to crank. Starts shaking and dies. Usually take 4 or 5 times to finally get it running and then does fine. Or u can let it set until it fully cools off and starts with no issues. Have Changed the following. Distributor. Plugs and wires. Crank shaft position sensor. Fuel filter. Throttle position sensor. Engine coolant sensor. Injectors. The injectors has been the last thing I changed and since then the truck don't have to really get hot like it did to have the same issue. Now it does it if it has been sitting over night. About 2 months ago I drove the truck for 2 weeks straight and it never had an issue. But it has started again. That is why the injectors was changed but still have same issue now. Please help! Have tried everything and don't wanna keep throwing money into truck that isn't helping issue

 

Since its 96, use a scanner look at live data and see what the temperature reads. Might be coolant temp sensor.
Edit. I see you replaced that.

 

I would run some tests on your fuel pump. I haven't had that problem, yet, but there are lots of threads on that.

 

Check for vacuum leaks in the small diameter plastic lines coming off of the manifold tree. Test your ignition coil. Check and verify fuel pressure (key on, engine on, and bleed down).

If you didn't replace the TPS with a motorcraft tps then I would seriously consider swapping it out. PCV and TPS should only be motorcraft, most of the other stuff really doesn't matter on brand. TPS should read .9-.97v closed, 5v WOT, with smooth increase as you open the throttle.

 

Where is the ignition coil located at?

 

Follow the middle "plug" wire off of the dist cap, it connects to the ignition coil.

 

Took truck to ford dealership to have it looked at. They said the throttle position sensor was bad. Replaced it again. Still have same issues tho. Pulling codes p0385, p0171,p0174, p1150, p1151. Any ideas ?

 

Got a fuel pressure tester and hooked it up to truck. When truck is on running about 40-42 psi. When rev truck up fuel pressure drops? Shouldn't revving the truck increase the psi? And also one turn off truck and start back up fuel pressure decreases low sometimes under 20 psi then once it seems to pick up fuel pressure increases back to 40. What could this be? Bad fuel pump or what ? Please help

 

Sounds like maybe the FPR is sticking open and causing low pressure by allowing the fuel to return to the tank, this is simply a guess but you can test it to find out.

 

I have a 1995 4.9 replaced the radiator, hoses, cap, thermostat, water pump and I'm still leaking coolant from behind something I put a new gasket and permanently on the pump gasket any ideas it barley gets to the n or before the n on normal for the gauge it's driving me crazy thanks