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View Full Version : Stalling out while driving, still... help!



usabodyguard
02-09-2016, 02:33 PM
Several weeks ago I posted about y 03 MM having issues of cutting out, stalling, and running rough at times on the freeway.

Several of you suggested dirty fuel filter, air filter, MAF... I thoroughly cleaned all of them... still having issues.

Someone suggested the IAC valve, replaced that, still having issues.

Motor is stock with 118,000 miles. Always regular oil changes, synthetic. No major engine work or repairs, just the usual plugs, COPs.

I was coming off the freeway yesterday and was turning right, I was coasting through the turn and it shut down, had to put in N quickly and start it back up, which it did no problem. This is maddening.:violin:

Turbov6Bryan
02-09-2016, 03:02 PM
Hmmmmmm
In the other thread you said the security light on top of the dash flashes when the car was acting up. I didn't catch that before

I was thinking fuel pump , but with the red light makes me think you have a electrical bug...

Check the engine harness, battery cables, grounds, and for giggles swap to another ignition key if it's handy.

What's the most recent thing you've done to the car before this issue flared up?

No aftermarket alarm?

RubberCtyRauder
02-09-2016, 03:07 PM
And check the wiring harness as mentioned in other thread that runs behind the cam covers/heads as this is a known wiring short issue area. You'll have to open up the loom

usabodyguard
02-09-2016, 04:09 PM
Hmmmmmm
In the other thread you said the security light on top of the dash flashes when the car was acting up. I didn't catch that before

I was thinking fuel pump , but with the red light makes me think you have a electrical bug...

Check the engine harness, battery cables, grounds, and for giggles swap to another ignition key if it's handy.

What's the most recent thing you've done to the car before this issue flared up?

No aftermarket alarm?

No aftermarket alarm. Doesnt the red light blink once when the engine starts, it may have been cycling through that while the car was going down the freeway in gear while stalled, and attempting to start, once it did, it shut off.

I checked over the engine harness and all of the grounds and wiring, everything looks ok.

01BADMERC
02-09-2016, 06:59 PM
An ODB2 scanner may make short work of this problem. I think Auto Zone will put a scanner on it if you don't own one. At least it might point you in a direction. Just a thought.

8UWITH6
02-09-2016, 07:49 PM
Autozone is not the place to go for driveability concerns. A code scanner does nothing for this situation. The only thing you should let a parts store do is sell you parts, nothing more.

01BADMERC
02-09-2016, 08:09 PM
Allrighty then....Didn't say that they were going to prop the hood open and start poking around. Just going to throw a scanner on it if it were throwing a code.

Sent from Droid Turbo 2 using Taptalk

usabodyguard
02-10-2016, 02:25 AM
I have not checked for codes as I thought that the check engine light would illuminate if any were present?

Zack
02-10-2016, 04:58 AM
Check the harness behind the drivers side cam cover

mtenderenda
02-10-2016, 03:40 PM
i have the same problem..the red blinking light on the dash doesnt work. plus the ODBC port doesnt work.. I am thinking its the warning harness.
I havent tried to fix the problem. Its been to cold to look at

JimP
02-10-2016, 05:39 PM
Crank shaft position sensor, they can fail intermittently and not throw codes, causing car to stumble and stall and restart as yours has. I've had this issue on other cars, same symptoms, no codes, was a ***** to figure out. If harness checks out, that's where I'd look. Good luck.

Jim

usabodyguard
02-11-2016, 03:08 AM
Thanks I will check out the suggestions, ill post my findings.

usabodyguard
02-11-2016, 04:08 AM
Crank shaft position sensor, they can fail intermittently and not throw codes, causing car to stumble and stall and restart as yours has. I've had this issue on other cars, same symptoms, no codes, was a ***** to figure out. If harness checks out, that's where I'd look. Good luck.

Jim

Just ordered one off amazon, it'll be here Friday... Fingers crossed, and thank you!

8UWITH6
02-11-2016, 06:44 AM
Throw parts at it. That'll fix it!

MOTOWN
02-11-2016, 06:47 AM
And this is a tuff part to throw at since you have to remove the ac compressor to install it.

fastblackmerc
02-11-2016, 09:14 AM
Check the harness behind the drivers side cam cover

This is what I'd check first.

usabodyguard
02-11-2016, 10:01 AM
Well ****... Thanks for the heads up

Badger
02-11-2016, 10:02 AM
Make sure the MAF sensor is really clean. My car used to cut out at highway speeds and it turned out my MAF was really dirty (gummed up by my K+N filter being overly oiled).

usabodyguard
02-11-2016, 10:22 AM
It was the first two things I cleaned, MAF & Air cleaner, that wasn't it

CWright
02-11-2016, 10:39 AM
Crank sensor would be my next guess if all this other isn't the problem. My car did the same thing yours is doing. After checking all the above we figured it out while on the dyno. Put her in the air, replaced the sensor, spun her back up and she's been running like a champ over a year now.

L.Mark
02-11-2016, 10:54 AM
I'll just throw this out. Mine was doing some of these when I first got her. Would stumble n shut down. Or wouldn't start with the red light flahing on top of dash. It got to the point to when it stumbled n died, it wouldn't restart or run without UNPLUGGING the MAF sensor...I had a MAJOR break in the wiring harness on the drives side wheel well. Long story short if problems still persist check your wiring harnesses for breaks...

usabodyguard
02-11-2016, 11:22 PM
I thoroughly checked the wiring harness especially behind the drivers side where the main harness runs near the heads, both looms were perfectly in tact. I also searched the rest of the wiring harness and outside of dust everything looked ok. However I did not cut anything open, so I am hoping it is the crank sensor, although installing is above my capability here at home...

usabodyguard
02-18-2016, 06:04 PM
Crank sensor replaced - car drives like a beast again!!! Wow, what a noticeable difference! Thanks to everyone who helped with advice.
Now on to my next problem - the electronic device that controls the fan speed!! damn car

JimP
03-03-2016, 01:02 PM
Crank sensor replaced - car drives like a beast again!!! Wow, what a noticeable difference! Thanks to everyone who helped with advice.
Now on to my next problem - the electronic device that controls the fan speed!! damn car

Glad to hear it worked out, like I said a while back this was a bastard of a problem to track down on a couple of different cars, neither of which were Marauders, happy to hear it's fixed!

FordNut
03-03-2016, 06:08 PM
Crank sensor replaced - car drives like a beast again!!! Wow, what a noticeable difference! Thanks to everyone who helped with advice.
Now on to my next problem - the electronic device that controls the fan speed!! damn car

The whole fan assembly.