http://www.wellsve.com/ 1997 Pontiac 3.1 P0341 Diagnosis and repair “The information presented in this program is based on a specific diagnostic case and mig…
GM 3.1 P0341 Troubleshooting by WELLS Vehicle Electronics
11
Like
Save
){kind=link}
- Tags:
Electronics, P0341, Troubleshooting, vehicle, wells
- Categories: GM
Comments
Write a comment
You must be logged in to post a comment.
yeah i have spark and they said the fuel pump works like i said the only thing that pops up is random miss fire cylinder 4 but that would not cause the car do die they said and they keep the car like for 5 days and they couldnt make it shut off
If it doesn’t start after it dies is the perfect time to check it. There is no way anyone can tell what is wrong from what you are saying and be reasonable accurate. Can the crank sensor cause your symptoms? Yes. Can i say that is what is causing it without at least knowing if you have spark or not No.
Mark Hicks
Wells Vehicle Electronics
but like i said the mechanics chek the fuel and spark and drove it and nothing happen my car hasent shut off in a while but if i drive it for like 30 or 40 minutes im sure it will the idlle drops and raises
when it dies some times the car dosent want to start i have to wait like about 7 minutes and it will start again but just for a moment it like if something in the car would get hot and shut off and it all started when the harmonic balancer broke into 2 pieces
How about at the moment of failure? That is why you have to be testing it when it failing! If you have a labscope or a full scan tool they will also work. However, from what you said I felt you probably did not have these tools. So i gave you an alternative method, that works well.
You can also call me if you like 1-800-558-9770 press 3 and ask for me 7 AM – 7 PM CST
Mark Hicks
Wells Vehicle Electronics
but they said that it could be the crank shaft but the computter said it was working fine
they check the fuel pressure and said that it was fine they couldnt get the car to shut off and the computter said that the crank shaft was good
The crank sensor is common to cause an intermittent shut down on your vehicle. However, I would check it first. First check to see if you are losing spark or fuel when it cuts out. Connect a timing light and a fuel pressure gauge where you can see them as you drive. If the pressure drops off and the engine dies you have a fuel delivery issue.
Mark Hicks
Wells Vehicle Electronics
i have the same grand prix and it shut off while driving only some times when i drive it for like 30 minutes i took it 2 mechanics and they cant find nothing with the car the only thing it has is a random miss fire in cylender 4 and i changed the harmonic balancer but not the crank shat sensor any idea what it can be cuz i really want to fix it its been like thiz for like 4 monts
I am glad we could help you out with the video. I wish you would have installed a Wells Part, but that is OK.
Mark Hicks
Wells Vehicle Electronics
it was very helpful then any other sites or etc. same as an 2003 v6 4.3. got my part from O’Reilly Auto Store that came with an LifeTime Warranty. Borg Warner.
first check the EGR valve. Check to see if it is sticking partially open. Remove and spray carb cleaner in one of the ports and see if it leaks into the other. If it does the valve should be replaced. Sometimes cleaning it will take care of the leak.
Let me know what happens,
Mark Hicks
Wells Vehicle Electronics
— 1999 grand am 3.4 liter which if im right is the same as the 3.1 block. it runs beautifl untill i put it into gear then it dies or when i stop it dies if i hold the gas and drop from neutral to drive itll stay running as soon as im slowing down again itll stall. crankshaft sensor im assuming could you give me some input please i have changed coil pack throttle position new plugs and wires it runs a heck of a lot smoother but same thing dies. please help.
Most cam sensors (hall effect) will drop the signal input voltage from the computer to ground thus producing a digital pattern.
Mark
Yes!
Correct!
Correct!
In some cases yes, in most no. The computer will either go to learned values or use the crank sensor for a reference and gang fire the injectors. You may notice a longer than normal crank time.
Mark
Yes, you are correct. When the two notches that are 10 degrees apart trigger the crank sensor the computer knows number 1 cylinder is at top dead center.
Mark
Does the hall-effect cam sensor vary the voltage or the current?
Do most cars with distributorless ignition systems have both a cam and crank sensor?
This car has distributorless ignition system, right?
Snap On Educational Scanner?
“Educational” meaning for school use only and not for use in the field?
1:16 Did the narrator say “The yellow sine wave at the bottom . . .” ?
Um. I thought sine waves are supposed to be round instead of squared.
It was my understanding that hall-effect sensors produced square waves.
If you disconnected the cam sensor while the car is running, would the car stall?
If the cam signal is messed up, why is there no perceivable engine performance problem. Shouldn’t spark timing be messed up as a result? Or does spark timing depend on the crank position sensor?
Is the existence of the cam sensor on this car for the sole purpose of detecting timing belt issues?
Why is the crankshaft called 7x?
Is it because there are 7 notches on the trigger wheel? (2 of the notches being close to each other to indicate one revolution.)