Engine stalls while driving?

Don't know if mine has long term trim readings. wont be back home until after 5:00 had to work today.

No problem. I will be here.

Roy

My obd2 doesn't have fuel trim readings. Installed new pcv valve..runs somewhat better. The rpms smooth out better than before, but doesn't stay constant. 1st video is after pcv valve was on for 5 minutes. 2and video after 10 minutes, stayed at the 1500's rpm till I shut it down, about 15 minutes later..at 1 time i actually got a code..

I saw all kinds of responses but nothing came up.

Please resend.

Roy

Tried to upload videos, but wont let me..put on new pcv valve..runs some better..starts idling real high..after a few minutes dropped down to 1300s and then went to 1500s after another 5 minutes and stayed there till I shut it down 20 minutes later..has flashed me 1 code..the idle still doesn't sit at a smooth spot ,moves up and down in various increments..have hard would it be to hook up a dash tach?

Obd2 don't have trim readout. installed new PCV valve, runs some better, idling in the 1,500's, but not stable. have gotten 1 code.

I posted on the other thread if it is still open.

Check your other post.

Roy

5.1 at idle..giving it quarter to half throttle 5.2-5.3.
Reference wire getting 00.1.
Ground wire getting 00.1.
Now getting 2 codes p1120 manufacturer control and p0122 throttle circuit low.

Roy.

Roy, any of these readings, useful?rpm's drop to 900's after about 15 minutes and acted like it wanted to shut off.

The signal is the issue.

It should be .5 at idle. This is with the connector connected to the TPS and you back probing the connector.

As you accelerate, the voltage should rise to a max of 4.8 volts.

Roy

Had it connected to the sensor and worked the probe into the wire casing, red wire. black wire to battery ground. this is a new sensor.

The gray/white, which is the signal wire is the one that should have 5 volts disconnected and the key on.

At closed throttle, it should have .5 volts connected and the key on.

That is the wire that the voltage should rise to 4.8 at wide open throttle.

Roy

When I said red wire I meant I used red probe into gray/white wire that is plugged into the TPS.

Okay,

What was the result with that wire for the testing I just suggested?

Roy

It's what I had posted earlier.

It doesn't drop to 4.8.

What is closed throttle voltage and what is wide open throttle voltage?

Idle was 5.1 and 1/2 throttle was 5.2.

Are you sure you are on the right wire? It sounds like you are on the reference wire, not the signal wire.

Roy

Reference wire was .1.

What I posted yesterday.

The gray/white wire is the one that needs the varying voltage. If it is constant then the TPS is no good.

Check for voltage on that wire with the connector off the TPS as well with the key on.

We are going off track here.

Roy

Will after work. I need to replace connector. also it's brittle.

But the gray/white was the one staying in the 5 volt range. tried with multi-meter set on 10 and 20. to see if any change. Wasn't any.

Then it needs a TPS sensor.

Roy

I'll have to order it. none in stock at nearby parts stores.

Check with rock auto on line. They have the best prices.

Roy

One coming in next week.talk then.

Okay, when you install it, do the same test and voltage should go up and down as I stated.

Roy

Hey Roy. New TPS installed.

And..

Okay, how you test it is to turn it off. Then turn the key on, back probe the signal wire and check the volts at idle and open to wide open and watch the voltage change.

The videos were not good. 3/4 of them were cut off.

Roy

Once you pass 1/3 idle the engine starts to rock back and forth.when I first tested it. it was a little over 5 volts at idle. but when you start to accelerate it still doesn't drop voltage.

You are not listening to me.

I said turn off the engine. This test is not done with it running. Just turn the key to the on position and test the voltage by moving the throttle on the throttle body. Again, the engine is not running.

Test it that way.

Roy

Okay.I thought it needed to be accelerated while running..while check tomorrow after work.

Switch on dark gray and white wire. only changes to 5.11 at full throttle.

Light gray wire with white stripe in center of plug.. 1.21 switch on..4.44 fully depressed throttle.

0.03 on the ground wire.

Okay, i.21 is too high. It should be .5 to .75 and 4.8 at wide-open throttle.

Can you adjust the sensor? Does it have slots on the sensor at the screws for adjustment?

Roy