What's the part called?

I have a Pontiac Firebird 94 3.4L V6 that doesn't start.
Engine turns, but no start possible. When searching for errors, I removed the EGR valve because it came from the air in which it was still running.
photographed the part.

I've changed the following parts so far.
Air flow sensor
Oil pressure sensor
Throttle valve complete with cold starter and idle controller
camshaft position sensor
Spark plugs with cables

Pontiac is still not starting.
I can't diagnose that I ordered a laptop and cable, but I haven't arrived yet.

I am grateful for any help
My English is not a good hope that I have been able to print so far.

 

That is a disassembled EGR valve. The 3 identical, individual parts are the armature assemblies/pintles that are electronically moved to control EGR flow into the intake manifold. They are not replaceable as individual components. You need a new EGR valve. If the pintles were not sealing the orifices in the valve body, it could make the engine difficult to start.


By "no start possible", do you mean it simply will not start? When you turn the key to "START" exactly what happens? Does the starter engage and crank the engine? Do you have spark while the engine is cranking? Using a stethoscope, do you hear the injectors pulsing while the engine is cranking? Have you checked the fuel pressure?

Quote:

I removed the EGR valve because it came from the air in which it was still running.

Need clarification. Why did you remove the EGR valve - to inspect it? What does "in the air" mean? Do you mean during the time that the engine was still running? If the engine was previously running, how well did it run? If it was running well, what happened? Did the performance slowly deteriorate, or did it suddenly just stop?


You can download a free copy of the 1994 Factory Service Manual at Gary's site:

http://www.mediafire.com/?40mfgeoe4ctti

For example, there is detailed description, and diagram of the EGR valve in Volume 2 of 2, page 6E3-C7-2

Your going to need the manual to interpret the codes that you will eventually be able to pull with Gary's software.

 

Hi Injuneer
it was very quiet
Until I wanted to go to work one morning.

it started up and down at high speed,
then went out

petrol arrives

when I turn the key to start.
Starter turns engine cranks.

The spark plugs ignite when starting.
All 6 tested the sparks individually.

because egr was leaking, i thought it was the fault.

made a plate on it where the egr valve is
it comes down to the intake manifold.
to test if it starts.

 

But is it at the correct pressure (43.5 PSI/3 bar)?

And are the fuel injectors pulsing?



To clarify, you have effectively sealed the EGR mounting flange on the exhaust manifold, and the intake manifold flange for the other end of the EGR corrugated tube to prevent any air entry, and it still does not start? Sealing both connections may not be necessary, depending on the configuration of the adapter tube from the exhaust manifold to the EGR valve. Simply blocking the EGR mounting flange on the adapter tube may be adequate to prevent flow to the intake manifold. As noted in my first post, I have no direct experience with the 3.4L V6 engine, so I am not familiar with the physical construction of the riser tube. My comments are based on reviewing the diagrams in the Factory Service Manual.