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Judy

Judy 2/9/2019

2008 Chevrolet Equinox LS 6 Cyl 3.40L

Engine

Why does the car stall out?

When driving it's a smoothe ride but it suddenly stalls out, no shuddering just stalls.
It will start after a minute or so but once it stalls it doesn't click or grind as if trying to start- just dead, but battery seems good because after waiting a minute or so everything starts up great. However ,once restarting sometimes it will run again Normally but other times it seems like it's not getting the gas when I use the gas pedal so goes nowhere and stalls again. I haven't had it stall out at idle only during the ride. It has a new gas cap and EGR valve. Full tank and the temp gage goes no farther than the middle of the gage. Please help -my mechanic can't seem to find an answer and I can't afford dealership prices. I'm 77 yrs old female. Feel like I got rooked by the private seller to begin with but no recourse there. I have only had the car for a few weeks.

1 Answer


Jimm

Jimm 2/9/2019

First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA.
Then, post a reply as 'add answer' with the specific code for more assistance.

This aspect is important; there may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

Do not skip this important first step - there are literally hundreds of possible fault codes. Avoid wasting/ throwing money at the problem.

Possible Causes of Engine Hesitation or Stumble / Stalling:

Dirty fuel injectors (cleaning the injectors often fixes this)
Dirty air filter (change filter)
Dirty / clogged fuel filter (change filter)
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires

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Jimm

Teddy B 2/9/2019

You bought the car as is -- that means the previous owner has no responsibility,
why place blame on someone else,it is up to you to find a shop that can diagnose a
vehicle & find a problem,your mechanic can not do that. It is 11 years old & may need
lots of work & a couple thousand dollars, to get it where it should be,that is normal
for most used & mostly never maintained vehicles.

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