I've previously rebuilt my fathers 351w Fuel Injection motor, because the Head Gasket was leaking. The truck has been sitting for about 2years till it was rebuilt. I have spark and I can smell gas. There was about an 1/4 tank of 2year old gas I've filled the tank to half way. Ive hooked up a light to test the fuel injectors there good. I tested the cylinder compression. Which reads,
Cyl1 - 130
Cyl2 - 140
Cyl3 - 135
Cyl4 - 135
Cyl5 - 145
Cyl6 - 145
Cyl7 - 145
Cyl8 - 140
Fuel Pressure - 36
I've also tested the fuel pressure with key on and off and that read 36. The entire top half of the engine is rebuilt, everything is stock. Possibly I'm missing a major vacuum hose or sensor somewhere but everything looks to be hooked up correctly. The engine spins and starts for only about 5seconds then dies, ive checked the timing probably over 10x's. I'm using this firing order and I had Cylinder top dead center. 1 - 5 - 4 - 2 - 6 - 3 - 7 - 8.
Any Ideas?
Q:What's the pressure with the engine running? Did you use rebuilt injectors or new ones, or the old ones? The distributor runs counter clock wise? Does it die all at once or is it more like it's running out of gas?
A:I didn't check the pressure with the engine running. I would imagine it being the same. The injectors are used, brother is a mechanic he cleaned them and put i guess the new orange caps on that are placed in the intake. Yes the distributor does run counter clock wise. The truck runs like garbage for the 5seconds or so that it does run, I need to have the throttle fully opened for it to start. I've tryed spraying starting fluid into the upper intake. Still samething.
I've replaced the Rotor and Cap. Ignition Control Module, Ignition Coil.
Q:Was the cam timed with the crank? If it's not a fuel issue then it sounds like a timing issue. There's no blockage on the exhaust? I'm just brainstorming here. The compression looks allright. You're obviously getting spark because the engine is trying to run but something is breaking the cycle. It's either fuel or timing.
A:Well I'm going to rule out the fuel because I can hear the fuel pump kick on and like I said I've tested the fuel pressure. Ive tryed both timing orders 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 and 1 - 5 - 4 -2 - 6 - 3 -7 - 8. Both allow the truck to start for several seconds because there'ss 4 cylinders the same on both firing orders. Ive choosen the 1 -5 - 4 one because well it says it on the sticker in the motor compartment. I've tryed taking out the distributor and spinning it 1 tooth in either direction to seen if theres a difference and well what I have right now is the best I can get it. I was thinking a possible leak in the upper intake gasket? or some sensor.
Cyl1 - 130
Cyl2 - 140
Cyl3 - 135
Cyl4 - 135
Cyl5 - 145
Cyl6 - 145
Cyl7 - 145
Cyl8 - 140
Fuel Pressure - 36
I've also tested the fuel pressure with key on and off and that read 36. The entire top half of the engine is rebuilt, everything is stock. Possibly I'm missing a major vacuum hose or sensor somewhere but everything looks to be hooked up correctly. The engine spins and starts for only about 5seconds then dies, ive checked the timing probably over 10x's. I'm using this firing order and I had Cylinder top dead center. 1 - 5 - 4 - 2 - 6 - 3 - 7 - 8.
Any Ideas?
Q:What's the pressure with the engine running? Did you use rebuilt injectors or new ones, or the old ones? The distributor runs counter clock wise? Does it die all at once or is it more like it's running out of gas?
A:I didn't check the pressure with the engine running. I would imagine it being the same. The injectors are used, brother is a mechanic he cleaned them and put i guess the new orange caps on that are placed in the intake. Yes the distributor does run counter clock wise. The truck runs like garbage for the 5seconds or so that it does run, I need to have the throttle fully opened for it to start. I've tryed spraying starting fluid into the upper intake. Still samething.
I've replaced the Rotor and Cap. Ignition Control Module, Ignition Coil.
Q:Was the cam timed with the crank? If it's not a fuel issue then it sounds like a timing issue. There's no blockage on the exhaust? I'm just brainstorming here. The compression looks allright. You're obviously getting spark because the engine is trying to run but something is breaking the cycle. It's either fuel or timing.
A:Well I'm going to rule out the fuel because I can hear the fuel pump kick on and like I said I've tested the fuel pressure. Ive tryed both timing orders 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 and 1 - 5 - 4 -2 - 6 - 3 -7 - 8. Both allow the truck to start for several seconds because there'ss 4 cylinders the same on both firing orders. Ive choosen the 1 -5 - 4 one because well it says it on the sticker in the motor compartment. I've tryed taking out the distributor and spinning it 1 tooth in either direction to seen if theres a difference and well what I have right now is the best I can get it. I was thinking a possible leak in the upper intake gasket? or some sensor.
