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Re: HELP - 2009 SRT8 Challenger won't stay running [Re: 69dart] #1657766
08/14/14 01:20 AM
08/14/14 01:20 AM
Joined: Jan 2003
Posts: 28,069
Irving, TX
feets Offline
Senior Management
feets  Offline
Senior Management

Joined: Jan 2003
Posts: 28,069
Irving, TX
A crank sensor telling the computer that the engine isn't turning can trigger the ASD.

Again, if the crank sensor maintains connection to the computer but fails to pick up the signal from the reluctor wheel then the car will assume the engine has quit running.
A fault code will only be stored if the crank sensor fails to report to the computer.

That's what trips up a lot of people. A bad sensor will not always trip a fault code. Sensors have two jobs.
1) Monitor the engine for it's designed purpose.
2) Report it's findings to the computer.
No matter what it says, if it talks the computer will think it's okay.

If an O2 sensor fails to detect unburned oxygen it will tell the computer to change the mix. The computer doesn't know it's gone bad and will assume the sensor is reading correctly. The computer will only point a finger at the O2 sensor if it quits talking.


We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
Re: HELP - 2009 SRT8 Challenger won't stay running [Re: feets] #1657767
08/15/14 03:08 PM
08/15/14 03:08 PM
Joined: Jan 2003
Posts: 1,413
Johnstown
69dart Offline OP
pro stock
69dart  Offline OP
pro stock

Joined: Jan 2003
Posts: 1,413
Johnstown
Looks to be fixed.

Bad fuel pump relay.

The mechanic said he has seen a ton of 08-09 dodges with bad relays and thinks dodge must have gotten a bad batch from bosch back in the day. He does alot of fleet maintenance on cop cars so he is very familiar with the LX cars.

I'm so relived just a little disappointed we didn't find it on our own.

Thanks for all the help guys!!!


33 Plymouth Roadster - 383 - 5.90 1/8th 9.58 1/4
68 Dart - 340
66 Belvedere - 400

Windy Hollow Garage - https://www.youtube.com/@windyhollowgarage
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