Engine stalls while driving?

No.

None of the ones that I have bought or the original have any type of adjustment.

Okay, what is the engine idle speed?

Roy

In the 1,500's for awhile, but sometimes after it runs awhile it will drop in the 900's and act like it's trying to shut off.

Can you back off the base idle screw until the idle drops down? It sounds like the throttle plat is open too much which is raising the voltage and when the voltage is high, the ECM is changing the fuel mapping.

Roy

Will see.

Rpm bobbing back and forth between 900 -1200. voltage now is 1.06. 4.54-4.74.

Is that with the IAC connected or disconnected?

Roy

Connected.

What happens when it is disconnected? The idle should drop to 500-600 RPM.

Rough idle. Started off between 266-472. after about a minute going between 474-587. trying to shut off.

Can you give me the long term trim readings while it is idling like that?

Roy

How is it listed on a cheap obd2?

Long term trim bank 1 and bank 2. It could be in percentage or it could be in voltage.

It will tell me if the engine is rich or lean.

Roy

Here are the 6 stream data readings it was giving me.

2 more.

Last 2.

Nuts. It does not give the trims and the mass air flow sensor readings.

The O2 sensor readings are full lean.

That tells me there is a lack of fuel.

Roy

New fuel pump, filter, relay, regulator, fuses and MAF sensor. inertia switch checks out. no bad fuses.

I know you replaced all that. We have been over that many times. No to the fuses. If it was, you would not have any voltage to the sensors and a ton of codes.

With the engine running, remove the PCV valve and then remove the oil fill cap. Can you feel vacuum or pressure?

This is with the engine running.

Roy

Will try after work.

Okay, I will be here.

Roy

Feel vacuum from PCV valve, but not the hole it slides into..and a very light suction at the oil cap spout..

That tells me the intake manifold gasket is leaking and drawing from the valley.

That would also explain why it is running rough.

There should be positive pressure from the oil fill cap, not vacuum.

Roy

REMOVAL

NOTE: The intake manifold is a four-piece assembly consisting of the upper intake manifold, the throttle body, the fuel injection supply manifold and the lower intake manifold.

WARNING: Residual pressure remains in fuel system after engine is shut off. This could result in injury or fire when fuel lines are disconnected. Disconnect inertia fuel shutoff switch and crank engine until fuel in lines is used up.

1. Disconnect the battery ground cable at the battery.
2. Remove the air cleaner outlet tube from the throttle body.
3. Remove the accelerator control splash shield and disconnect the throttle cable and bracket assembly.
4. Disconnect all vacuum hoses from the fittings on the upper intake manifold.
5. Disconnect the electrical connections at the throttle body, upper intake manifold, lower intake manifold and fuel injector nozzle tip.
6. Disconnect the fuel supply and return lines at the fuel supply manifold.
7. Remove the bolts securing the ignition coil and bracket assembly to the upper intake manifold.
8. Remove the six nuts securing the upper intake manifold and remove the upper manifold.
9. Remove the valve covers.
10. Remove the intake manifold attaching bolts. Tap the intake manifold lightly with a plastic mallet to break the gasket seal, and lift off the intake manifold assembly.
11. Remove all old gasket material, and sealing compound.

guess this weekend if i have time i will tear it down and change. i also have the fun of getting ready for my first colonoscopy, joy. will write back after i change it. thanks

You are welcome.

Roy