shuts off while driving?

These cars had a problem with fuel pumps or crankshaft sensors but to be sure this guide should help us.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Please run down this guide and report back.

Yukon shuts off while driving down rd. It doesn't do it all the time. We have noticed that if you have the air and you let the vehicle sit and idol it will shake like it is choking and then eventually will shut off completely or you have to shut it off. We have taken it to 4 different mechanics and no one seems to be able to tell us anything. no codes come up but the check engine light comes on. PLEASE help

Usually if there is a sensor bad, or something like that, the service engine soon light will come on? There is a code stored inside of your computer somewhere causing the light to come on.

Lets run down this guide to see what come up

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

GM has had lots of problems with the fuel pumps I have heard of a recall on these but I am not positive. This may be the problem.

So, start with finding out what the code is for the check engine light. check back here and let me know what the code is for the light.

Cheers,

It didn't have any codes what do I do now?

It sounds like a classic fuel pump issue here is a guide to show you what you are in for when doing the job and diagrams below to show you how on your car.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump


Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers

I wanted to say thanks for this post fixed my car runs great!

What is wrong with my SUV GMC Yukon? I will start it up and start to drive and once I come to a stop it cuts off and starts up right away. I then maybe get to a turn at a light and it stops in the turn. If it runs cont. for 20-30 min I don't have the problem any more. I took it to the shop and had the fuel pump changed and filiter. What else could it be?

Do you have a check engine light On?

Get the idle air control valve/throttle position sensor/MAF/MAP sensors/EGR valve checked out-

Car wouldn't crank,replaced battery with a rebuilt one a month later is wouldnt crank for my wife.I came home after a few days and it cranked for me even though it took some time.Had battery recharged and alternator checked.Reinstalled battery and alternator drove around 2 miles and it just shut off refired moved a few hundred feet and it shut off again.A few hours later it cranked and made it the 2 miles back home.Took to a repair shop everything checked fine left it there over the weekend when they came in Monday morning the volts was only at 9.Put in a brand new battery drove 2.5 miles home and it shuts off again in the drive way.

What is the voltage reading at the battery at idle?

Voltage is around 13 at idle

When it dies and you try to start it does it crank over normally? Or does it slow crank? Also any codes in the computer?Does it start up right away after it dies?

Yes it starts back up normally,no codes have popped up so we are really confused,Fuel pump was replaced 7 months ago

Has the coolant temp sensor been checked to make sure its reading correctly?

I was driven my truck and it just shut off on me. The battery is brand new ,the alternator have been checked. I was told my starter is bad, I think it's my fuel pump. What do u think?

not that I am aware of,could it be an ignition relay or the ignition coil

Before you replace parts, a few checks should be done. First, does the starter still crank the engine? Second, have you checked to see if there is proper fuel pressure to the engine?

Let me know.

As it dies are you loosing accessories like blower fan radio etc?

No and the voltage stays up also

This is a tough one because it starts right back up

Exactly,if you had to guess what would you say?

Stalls like it runs out of gas in 80 degrees or above weather sit on the side of the road for 10 to 15 minutes your part came in from the gas tank seems like vehicle starts runs about 20 to 30 minutes same thing over and over when it is cold never had this problem it is not the fuel pump new fuel filter gas cap tried better everything other than sensors what about the crankshaft position sensor getting hot shot in the fuel off please help.

Its really hard to say without driving it and getting to see what its doing for myself.

Hot failure is a classic symptom of a bad crankshaft position sensor on the GMs. I have gotten to the point I carry a spare and the wrenches to change it in my Blazer.

A quick test can be done using a can of "canned air" which is actually R134A. When it shuts down, turn the can upside down and spray the sensor. (upside down sprays out the coolant as a liquid, not as "air", don't spray it on your skin) Wait a couple seconds and try to start it. The 134A will chill the sensor and make it operate, until it heats up again.

Thank you I will be giving that a try today, will let u know.

Thank you guys for the help it was the crankshaft position sensor

Glad we can help, please consider a small donation to help us keep the site going, the link is below.

Best, Ken

Driving for about 45 minutes on fwy. Got off fwy. & car made a noise (maybe electrical whirl?) for about a minute... then died... everything turned off and slowly came to a stop. Tried to start again and it won't crank over. Thought maybe it ran out of gas and put two gallons in. It didn't do anything. Please help!!

check battery first for condition an dload test. auto parts do it fro free

My car is the SLE model.
Pulled in garage after dropping my daughter off at her volleyball practice. Took a two hour nap while waiting. After my beauty rest jumped in my ride and started her up. Started like a champ. Started pulling out on reverse and all of a sudden engine just shut off. Started her back up with no problem. What i noticed was the change in idle. On reverse needle on gauge went below 500 rpm. maybe at 400 or so. It slowly went back to 700 moments later. I then placed her in drive and same thing drop below 400 or so then gradually rises up. What the heck is going on? Dirty MAF sensor? dirty throttle body? plugs going bad? Please help. Thank you.

Hello,

Yes all of the above can cause the problem along with a weak fuel pump, here are some guide that will get us started in the right direction.

https://www.2carpros.com/articles/mass-air-flow-service

and

https://www.2carpros.com/articles/how-to-replace-a-mass-air-flow-sensor-maf

and

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

and

https://www.2carpros.com/articles/how-to-change-spark-plugs

and

https://www.2carpros.com/articles/stall-at-idle

Please let us know what happens, we are interested to see what it is.

Cheers, Ken

Thanks for the reply Ken. It was actually the maf. I removed it and the intake tube as well. Cleaned both maf and throttle body with their respected cleaners. After clean idle is back to normal and never drops below 700. I was relieved, because i was thinking it was the TCC solenoid. I was hoping not to drop the trans pan to get to it.

Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken

Hi Ken..

Kind of jumped the gun a little. It was driving fine for a bit, but the dreadful CEL on the dash along with a message stating 'Reduced Engine Power' on dic. I pulled the codes and got P1518 which points to the Throttle Body. Maybe I sprayed too much Carb cleaner in the area and got the wires wet somehow. Going to check the connectors before i buy a new TB.

Please let us know what happens, we are interested to see what it is.

Cheers, Ken

All connectors pertaining to the TB all good. I shook them and still didnt post any error code(s). Did more research on the P1518 and it could be a bad tac module, which I just ordered. I'll update once i have replaced the part.

Please let us know what you find.

Cheers, Ken

I installed the tac module yesterday. Took her to work this morning and so far so good. It was fairly easy to remove and install. Hopefully code wont come back. Crossing fingers.

This just started while driving I went to pass another car I lost power then the truck shut off. It started up, but when you accelerate it bogs down and shuts off again. Whenever you accelerate the truck just bogs down and shuts off all the time, but it will always start back up.

check fuel pressure with a gauge auto parts rent it some of these models had a bad wiring harness by the pump and the connector was replaced as well as about a foot of harness. the new pumps usually come with it.

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