Engine shut off without warning

Good morning.

Does it start right back up or do you have to wait a period of time?

Is the check engine light on while driving?
Roy

it started immediately no check engine light. :( When she shut off only battery light and oil light was on.

okay, thanks. the lights are normal when the engine is not running and the key on.

possible causes are:

1. crankshaft position sensor. this is common but needs to be checked with a scan tool.
2. throttle body. if the plate is dirty and full of carbon it will cause this. you need to clean the plate with throttle body cleaner to remove the carbon build up.
3 EGR valve. if the valve does not close quick enough, it will remain open and cause a massive vacuum leak and make the engine stall. this can be monitored with a scan tool as well.

Has anyone looked at this yet?

Roy

i checked with scanner no codes. :/ car runs good, i will clean throttle now.

Okay.

Can you monitor live data?

Roy

Also, sometimes my rpm's jumping little bit. sparks are new plugs are new.

Okay, still do those checks.

Roy

DTC-CNT 0
FUEL SYSTEM1 _ CL
FUEL SYSTEM2 _ N/A
LOAD-ETC(C) _62
SHRIFT1(%)_ -0.8
LONGFT1(%)_ -3.9
SHRIFT2(%)_ -3.1
LONGFT2(%)_ -3.1
MAP(KPA)_ 34
RPM(MIN)_ 747
SPARKDV_14
IAT (c)_ 29
MAF(G/S)_ 4.25

Throttle looks dirty.

Readings look good.

Clean the throttle body.

EGR? any information?

Roy

okay, i cleaned Throttle body.
EGR-PTC (%) _ 0.0

Okay, good.

How about fuel pressure? did you check that?
Roy

No i did not check fuel pressure. how can i check that?

Okay, you need a tester for this test. if you do not have one, you can rent one at a parts store.

Roy

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Hi, fuel pressure was good. I cleaned throttle body and car fills okay .

what was the fuel pressure?

Roy

I do not remember. my mechanic said that fuel pressure was good.

Did the issue happen to your tech? He needs to make it happen and see what happens when it cuts out.

What else has he done. Forget about the codes. That will tell him nothing at this point. He needs to recreate the issue.

Roy

Car driving good never shut off. Runs and drives like a new.

Okay, you will need to wait until the issue happens again to track it down. Right now, you cannot fix something that is not broke.

Did you get the throttle body cleaned?

Roy

Yes I cleaned throttle body and changed fuel filter.

Does the issue continue to happen?

Roy

No it has never happened.

This is one of these issues that you have to wait until it becomes more consistent so your tech can actually experience the issue and diagnose it for you.

The throttle body cleaning may have taken care of it. You will need to wait to see if it continues to be an issue.

Roy

It still happened, car shuts of when rolling (foot of from gas pedal). cleaned throttle body (replaced 12,000 mile ago with OEM). car starts fine drives fine but when it rolling about 20-30 mph it will shut off (not every day).

Good chance the throttle body itself may be the issue. I attached a guide for you ro review on this problem.

https://www.2carpros.com/articles/engine-stalls

Below are the instructions and some pictures for you.

Roy

Removal and Installation

1. Remove the Air Cleaner (ACL) outlet pipe.

2. Disconnect the electronic throttle control electrical connector.

3. Remove the 4 bolts and the Throttle Body (TB).
Discard the TB gasket.

To install, tighten to 10 Nm (89 lb-in).

4. To install, reverse the removal procedure.
Install a new TB gasket.