Help Please!! LS starts then dies

[scott777]

Just finished putting a hydraulic cooling fan on my wife's 01 LS V8 when I try to start it , it starts then shuts off after a few seconds. Do I need to reset the computer? If I do, how do I do it. Thank you for your help

[shorod]

Welcome to the forum!

Was there maybe a hood, trunk, door, or glovebox light that was on for an extended period while you were working on the car? You might try charging up the battery. The electrical system on these cars is very sensitive to strong batteries.

You shouldn't need to reset the computer, but if you have access to a scan tool, scan the PCM for codes prior to clearing the codes (effectively resetting the PCM).

Did you have any of the appearance covers off the top of the engine during your work? Maybe you disconnected the Idle Air Control motor, or didn't get the Mass Air Flow (MAF) sensor reconnected tightly, or didn't get the intake air tube properly connected/secured.

What happens if you give the car some throttle after it starts, will it say running? Does it run smoothly?

-Rod

[scott777]

Rod,
Thanks for your help. It was the air intake that was not on all the way.It ran fine after that. Thanks again, Scott

[shorod]

Great, glad to hear you got it figured out and running again. Those types of issues can be frustrating. Guess how I knew to suggest you check that area....

-Rod

[b08b]

Just replaced dccv and installed new battery today. After filling degas bottle with coolant, I was about to bleed system. Car starts then sputters and dies. After several attempts, car now starts and immediately dies. Any ideas?

[b08b]

By the way, it's an 04 lincoln ls v6

[joegr]

Originally Posted by b08b

Just replaced dccv and installed new battery today. After filling degas bottle with coolant, I was about to bleed system. Car starts then sputters and dies. After several attempts, car now starts and immediately dies. Any ideas?

Did you perhaps damage or otherwise mess up the MAF?
Is the intake tube properly reattached with no air leaks?

[b08b]

You are right on the money. The tube was gapped just enough to cause the problem. You guys are priceless. Many thanks

[captncavman]

my aunt has a 08 lincoln mkz doing the same thing cranks then dies i have rented a obd2 and ran a diagnostics it read oxy sensor inc heat sensor inc catalyst sensor inc and avap sensor inc i pulled them out they wern,t clogged up i sprayed them with carb cleaner and put them back in i pulled the throttle control off and cleaned it with carb cleaner put everything back together made sure everything was tight and no leaks same thing is there anyway to test the mass air flow sensor

[shorod]

Did you record the specific diagnostic code numbers (such as P0174, etc.)? If so, please provide the code numbers.

If the scan tool you rented includes a datastream mode you can monitor the operation of the MAF sensor assuming you can keep the engine running long enough to see the flow rate change according to the MAF sensor reading.

Has the battery ever been replaced? If not, there's a reasonably high chance the battery is contributing to the issue, especially if the battery is more than 3 years old or so.

-Rod

[captncavman]

the obd2 i rented does not give me numbers it tells me the oxy sensor is inc the heat sensor is inc the catalyst sensor is inc and the evap sensor is inc everything else shows ok the battery is fairly new and it wont stay running long enough

[captncavman]

the problem was a dirty air filter simple fix for such a big problem