SPONSORED LINKS

My car randomly shuts off?

Tiny
ALEX ZAVALA
  • MEMBER
  • 2006 JEEP GRAND CHEROKEE
  • 6.1L
  • V8
  • 4WD
  • AUTOMATIC
  • 122,000 MILES
My car shuts off randomly usually when I put it into reverse mainly when I turn the wheel all the way either direction but only shuts off in reverse when turning the wheel all the way in park it stays on even if I turn the wheel what could it be?
Also, another thing I disconnected the negative on battery and it died so I changed the alternator, and it still shuts off when disconnected the negative terminal.
SPONSORED LINKS
Friday, December 30th, 2022 AT 3:34 PM

11 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Yep, you must leave the battery connected because it acts as a voltage absorber, it's not like the old days of removing the battery cable to tell if there is a problem. We should run the codes to see what comes up. You could have a dirty throttle bore or a vacuum leak causing the problems.

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

and

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

Do this guide when the engine is cold only:

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

and

https://www.2carpros.com/articles/throttle-actuator-service

Check out the images (below). Please let us know what happens.
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, December 31st, 2022 AT 11:37 AM
Tiny
ALEX ZAVALA
  • MEMBER
  • 8 POSTS
So, I got an update on that, I tested the fuses to the ignition coils, and they worked but when I tested the 12v on the connector it didn’t work on the ignition coil that was bad. I checked another ignition coil and It worked, then I check the ground on the connector, and it worked on the bad ignition coil and the good one. So, could this mean that the computer/PCM is doing its job just something in the power wire too the connector is bad?
Was this
answer
helpful?
Yes
No
Saturday, December 31st, 2022 AT 9:05 PM
Tiny
ALEX ZAVALA
  • MEMBER
  • 8 POSTS
I also have a video to show the RPMs and what the truck does.
Was this
answer
helpful?
Yes
No
Saturday, December 31st, 2022 AT 9:05 PM
Tiny
ALEX ZAVALA
  • MEMBER
  • 8 POSTS
It has a rough idle in park but in reverse it shuts off after a second or two.
Video (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Saturday, December 31st, 2022 AT 9:41 PM
Tiny
ALEX ZAVALA
  • MEMBER
  • 8 POSTS
Also, all the codes that came up I already replaced the crankshaft sensor.
Image (Click to make bigger)
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, December 31st, 2022 AT 9:41 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Thanks for the video, it helps but I cannot read the code sheet. Can you please take a clearer picture and upload it for me? It sounds like you may have an IPM going out. Please check for vacuum leaks and service the throttle bore. Let me know.
Was this
answer
helpful?
Yes
No
Monday, January 2nd, 2023 AT 1:17 PM
Tiny
ALEX ZAVALA
  • MEMBER
  • 8 POSTS
I’m back Sir Ken.

Not sure if that photo helps more should be more clear
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Monday, January 2nd, 2023 AT 4:52 PM
Tiny
ALEX ZAVALA
  • MEMBER
  • 8 POSTS
Photo isn’t really clearing up I can just right the codes.

P0300 multiple cylinder misfire
Random misfire detected

SECONDARY DTCs
P2302-ignition coil 1 secondary circuit
P2305-ignition coil 2 secondary circuit
U0100-lost communication with ECM/PCM
U1402-implausible engine temperature signal received
P0732-gear ratio error in 2nd
P2638-torque management feedback signal performance

C2100 battery voltage low

U140E implausible vehicle configuration data received

C2202 original vin mismatch/missing

C121E brake pressure sensor comparative performance

C107C brake pedal switch 1/2 stuck
Was this
answer
helpful?
Yes
No
Monday, January 2nd, 2023 AT 5:03 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Wow, that is a bunch of codes alright. I am starting to think the IPM, or front control module is the problem. I would replace the IPM first because this is a well-known problem with these cars. Here is the location and replacement instructions for both in the images below. Please let us know what you find.
Images (Click to make bigger)
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Thumb
Was this
answer
helpful?
Yes
No
Tuesday, January 3rd, 2023 AT 11:30 AM
Tiny
ALEX ZAVALA
  • MEMBER
  • 8 POSTS
Hey ken,

I’m back. I’m finally getting time again to work on the truck. So, my question is that is they’re anyways I can test if the IPM or front control module is working or is it only a matter of buying a new one and finding out?
Another thing I try to look it up at a parts store like AutoZone but they don’t seem to have it for my specific truck
2006 Jeep grand Cherokee srt8.
It’s the 6.1L v8.
Was this
answer
helpful?
Yes
No
Wednesday, January 4th, 2023 AT 12:33 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Yes, they are difficult to test on your own, a rebuilder has the equipment to do so.
Was this
answer
helpful?
Yes
No
Wednesday, January 4th, 2023 AT 8:07 PM

Please login or register to post a reply.

Related Engine Stall While Driving Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Engine Stalls While Driving
GUIDE
Engine Stalls While Driving
An engine that stalls while driving and then starts back up again, either immediately or after a short time is different from an engine that just wont start or if the...
VIEW MORE

Sponsored links