any body have a spare engine they can take pictures of?

Thats sweet, I love yellow...makes rust easy to spot.

Both my axle seals are toast on mine and it's starting to make a bit of a whine around 120KPH so I would have been totally happy with an open diff but this one came up so.......bonus. The black is POR-15

 

If you don't have a mechanics stethoscope you can probably use a piece of plastic hose.

Do the injector rotation test. Try to rotate/spin the injector by trying to turn the injector electrical plug from side to side. They should revolve quit freely.(fig 31)

Did you remove the fuel return line and try to pump gas? I am trying to do this in a logical order and logic says that even if your injectors are good they arn't going to start your car if their is no gas in the Fuel Injection system.

 

Ok great so you should have pressurized fuel in the fuel rail then. The timing is okay and you have spark so the cylinders must not be getting fuel.

Have you done the resistance test on the injectors and tried to listen to the injectors to see if they change in sound as the engine speed changes.

If you can't hear the injectors then place a finger on the injector and see if it vibrates faster or slower as the engine speed changes.

An Injector is a pretty fancy name for a open/close valve. The injector does not really inject the fuel into the cylinder. All an injector does is open a valve inside itself and the pressurized fuel in the fuel rail sprays through it until the injector closes its valve. So really an injector is basically the same as the tap on your sink. In the open mode pressurized water flows out the tap. An injector is designed to spray a specific pattern but other than that its just a valve.

So when you listen or feel the injector you are trying to hear or feel the opening/closing of the valve inside the injector.

I will check and see what tests you can do to make sure the injectors are getting a proper signal.

Have you tried putting the gas pedal all the way to the floor before cranking the engine? If the engine is getting gas but not starting you must be carefull as the gas in the cylinders can disolve the oil on the cylinder walls. So don't crank it for more than 5 seconds with the gas pedal on the floor. If it's going to start it will fire right away with the gas pedal on the floor.

 

If the engine wasn't making so much noise you could hear it but without a mechanics stethoscope it's probably easier to feel it.

 

It would appear that they do based on Fig. 45 they appear to have one hooked up to a battery.

 

Ok I just went out and checked an injector by running 12 volts to it and you can definetely hear it click when 12 volts is applied to it.

 

No

It definetely should not jump a tooth like that although if everything was working fineit should still fire but your intake cam drives the distributor so not only are your intake valves not opening and closing at quite the right time but your distributor and spark are not quite right either.


While your checking injectors test the cold start injector too, to see if it makes a clicking sound.

 

Do you mean that when you crank the engine and test the clip it has 12 volts?

 

So to try testing the injectors to see if they are blocked make a setup like you see in the picture. Set the compressor to 30 psi. If your going the tire route you will need to loosen the valve so the tire has a constant leak. You should be able to hear air going through the injector when 12 volts is applied.

You can try this for the 4 injectors and the cold start injector.

The 3sge fuel pump is rated at 33-38psi or 226-265kPa.

 

Damn thats a cool idea. I don't think I could have ever come up with that one.

 

Well actually the original plan was to put gasoline in the hose and see if the injector would spray but then a couple more brain cells fired off and said "spaying gasoline is dangerous and you don't really want to blow the lad up" so air will do just fine to see if the injector is at least opening and closing. A friend of mine recently sent me a video of a comedian doing Achmed The Dead Terrorist in which case poor Achmed blows himself up so I'll post that in the off topic forum and have Sterling just use air.

You could still use the "original plan" to check the spray pattern....just be very very carefull. (and pray alot)