HELP! 94 suburban wont start

[back2life]

ran fine when i parked last night,came out in morning and would not start up checked for spark and did not have any,had ignition module checked and its ok, coil ok, had fire out of coil going into distributor but none coming out? put new cap and rotor on,now i have spark coming out all the way to the plugs,ang gas spraying into the throttle body but still just spins when trying to start it. it doesnt even try to fire up. someone please give me some help i dont know what else to look for

[chuck's]

Check and make sure wires put on properly.It can happen to the best of us.If it is possible,check the fuel pump pressure.I came across a 94 pick-up that showed fuel being spayed,but when the fuel pressure tester was hooked up,pressure was nowhere near requirements.

[back2life]

have good pressure could it have jumped time? whats the best way to determine this?

[chuck's]

To check the timing you must rotate the crankshaft until the timing mark on the crank lines up with the largest vee notch on the timing chain cover.That would be 0 degrees(TDC).Take the distributor cap off and check where the rotor is pointing.Don't be mistaken for being 180 degrees out.The rotor should be pointing towards the front left of the engine.(number 1 cylinder).
The best way I have found to aid in rotating the crank is to use a 15/16 socket on the alternater pulley and help the serpintine belt rotate the crank by pulling the belt.
If you then need to set the timing with a timing light, there is a tan wire with a black stripe that must be disconnected to set the base timing.I do believe that in a 94 it is located underneath the glove box and to the left of the heater motor.Once timing is set, turn engine off and reconnect.I hope this helps and gets you mobile again.

chuck's

[tblentrprz]

when at tdc remember that the rotor will either be pointing at #1 or #6 cylinder. Which location will depend if it is compression (#1) or exhaust (#6) stroke. If it's off either position, it's a concern. I don't know a good way to determine which stroke other than pulling the driver side valve cover and looking at the intake valve the compression stroke will occur right after. You may be able to see or feel the spring through the oil cap opening. good luck

[back2life]

thanks guys ill check it out as soon as i get a chance

[back2life]

i need to know how to determine if the camshaft is in the compression or exhaust stroke on no. 1 @ tdc last chain i put in it did not start . i put in new pickup coil and module and still no start. ive put in the timing chain,again. distributor is still out of the engine but does it have a tapered slot so it will only go on one way into the camshaft gear? i need to know all this to make sure its back in time ( i think it got disturbed on the first chain we tried to put in cuz we thoght it was 180 out but it might not have been? just want to make sure, tired of messing with it and will the engine be able to start without the timing cover on it?

[chuck's]

To check tdc of number one cylinder,remove the rocker covers and rotate the crankshaft.Watch the valves on number one and number six cylinder.Number one cylinder will be at tdc when the exhaust valve on number six closes and the intake valve just begins to open.When placing the distributor in place,mark on the distributor housing where number one wire is on the cap.That will give you the direction the rotor will be pointing once it seats all the way down.You must check the oil pump drive slot so the distributor will sit all the way down.I hope this helps you to get back in time.
chuck's

[back2life]

i needed to know if my distributor will seat on the oil pump only one way, or can it seat 180 out also? the rocker should be tilted up when the valve on 1 is closed right? will the engine start up without the timing cover on it? what else can it be if i got fire,gas,and the correct timing? i think i got it all out of wack by disturbing it when we thought is was 180 out before!

[Fireplug]

The best way to check if you are on the compression stroke is to remove the valve cover on the drivers side , cylinders 1,3,5,7, and tap the engine over with the starter and watch the number 1 cylinder, first 1 up front on the engine.
Now look at the first 2 rocker arms and look at the exhaust manifold 1 rocker arm should be close to being in line with it so that is the exhaust valve and the other is the intake. Tap the engine over using the starter and watch the rockers move. you will see that at some point boths rockers will start to move. When you see the intake open then close and then the exhaust open the close start looking at the intake rocker and as soon as it starts to move you are starting the intake cycle so if you can turn the motor over using a crankshaft socket(unless your real good at very small taps to crank the engine with the starter) as the intake valve rocker is almost allthe way back up and even with the exhaust valve start looking for the timong marks on the crankshaft pully. You are now on number 1 compression top deat center (tdc) Dist rotor better be pointing to the dist cap number 1 spot. if not remove the dist and rotate it until its even with the number 1 post inthe dist cap
hope this helps

[back2life]

basically the dots on the gears can be line up on compression stroke at#1 and/or #6? since my chain and gears are still out can i just turn the cam by hand to watch the valves open and close without damaging anything. i need to make sure its in time and its a first time messing with it