2000 5.7l Express won't start

[ggmurray]

RH,

New CPS intstalled but Cam sensor is original, do I need to worry about checking the new crank sensor

[rhandwor]

Any injector will do but if ording only one noid light look at your electrical connector first. The security system will shut down all of them.

[rhandwor]

Check injector first as you shouldn't have spark with a bad camshaft position sensor.
How much mileage is on the engine if over 100,000 you could have jumped time.

[ggmurray]

RH,

Ya your right, why spend time on the crank and cam sensor if I have spark......I'll work toward the power to the injectors 1st thing...Will test light be ok...Also the Spark...do you think it's ok if it's a redish kinda color??? I was holding the coil wire about 1/2 away from a copper wire I attached to the block....and had the spark, from there I took a plug wire off and stuck a sparkplug in the boot and held the plug to the exhaust manifold and you could see the spark there thus I figured it was ok...

[ggmurray]

RH,

104,000 miles, but running great!!! came home parked and got up the next morning and the rest is history!!

[rhandwor]

The older engines had a non metal covered top timing gear but I'm not sure on the newer engines. Hopefully somebody else will answer. The test light should work I imagine the injector will draw enough power to light a test light bulb.

[ggmurray]

RH,

Back at 100,000 I had to replace the intake manifold gaskets, it started leaking anti-freeze out the back of the manifold where you have to make the bridge out of silicone, but they were original anyway. One other trouble until now...I think I'll buy the hole kit of noid lights.

[ggmurray]

RH,

Maybe someone will know about the T gears, I sure hope it hasn't jumped time. What did you think about the P3351 code?

[rhandwor]

Personally timing gears are cheaper than going to the dealer for a theft shutdown. Ponchutty GM forum can help you if theft system is your problem. On the code I would have to look in my manual out in the garage.
Try putting it on TDC then pull number one plug use a small screw driver and make sure the piston is at the top. The valves have to be closed with the piston on the compression stroke. Use a hose from a compression tester to be certain you are on the compression stroke. You can feel the air coming out of the hose. This is after checking for power to the injector.

[maxwedge]

The easy way to do this is to get a scanner on the truck and look for cranking rpms, if good the cps is ok. As mentioned look for 12v to the injector circuit also.

[ggmurray]

Max,

Scanner is no problem, showing code P1351 right now, but I've looked over all the wiring and connectors...anyway how many RPM should I be looking for? or If it shows any rpm does that men the cps is ok

[ggmurray]

Max,

126 RPM according to scanner

[ggmurray]

Max,

That P1351 code = Manufacture Control Ignititon system or misfire....

[ggmurray]

Hey Everyone,

Update! Pulled the connector off the injectors and used my DVOM to check for 12V.....with the key in the on position I had 11.87 to 11.90 VDC on the terminals I checked in the plug any thoughts???? Also I guess the noid light tester plugs into a set of terminals on the plug which lights up when the injector is supose to fire.....

[rhandwor]

The computer completes the ground use a piece of small copper wire in one terminal hook the clamp on this wire put the metal tip into the other terminal. The security system tells the computer to shut down by not supplying the ground. You should have continous power supply which you do have at this time.
The bulb should flash when cranking.