Bama Tunes, CAI, MagnaFlow Catback, Xpipe Problem
03-26-2012, 06:19 PM
#1
Bama Tunes, CAI, MagnaFlow Catback, Xpipe Problem
Hey All,
I got a new 2012 3.7L V6 Mustang.
I upgraded the following:
Here is the problem.
There is a constant drop from 1000 rpm's to 500rpm's. We have this problem with our without a custom tune. I even had SCT come out and tune the dang thing and not even SCT could stop the constant drop in RPM's.
What we have done to troubleshoot.
We have checked for leaks, check for anything loose., Everything has been tightened.
We have unplugged the battery for an hour, turned the car back on and let it idle for 5 minutes, turned the air-conditioning on for 2 full minutes full strength and no change in the idler.
Anyone have any idea why when we put the new parts on we are having a constant idle drop?
Thanks
I got a new 2012 3.7L V6 Mustang.
I upgraded the following:
- Airaid Cold Air Intake
- BBK Long Tube Headers
- BBK Offroad Shorty Xpipe
- Magna Flow Catbacks 15591
- Bama Tunes 91 Octane
Here is the problem.
There is a constant drop from 1000 rpm's to 500rpm's. We have this problem with our without a custom tune. I even had SCT come out and tune the dang thing and not even SCT could stop the constant drop in RPM's.
What we have done to troubleshoot.
We have checked for leaks, check for anything loose., Everything has been tightened.
We have unplugged the battery for an hour, turned the car back on and let it idle for 5 minutes, turned the air-conditioning on for 2 full minutes full strength and no change in the idler.
Anyone have any idea why when we put the new parts on we are having a constant idle drop?
Thanks
03-27-2012, 11:05 AM
#3
Well, bama tunes is very aware of what i have. I got it all from American Muscle. So, i was quite thorough in what i had. And, no matter the tune, racing, performance, street, stock, or custom from SCT themselves, the problem remains the same.
03-27-2012, 05:49 PM
#5
Howdy, Zorcean!
When you checked for leaks, did you smoke test the car? If so, did you smoke test the exhaust too? Have you checked where the headers mate up with the heads to make sure there's no gaps/leaks there? Normally, if it's hunting for an idle like that, it's going to be an air leak somewhere. The reason it's "hunting" for an idle is because with a leak after the MAF sensor, the car doesn't know how much air is actually coming in the engine.
I would smoke test the intake system, the vacuum lines and the exhaust. That's going to be the best way to try and find it.
Keep me posted though (feel free to PM me if you update this thread) and let me know what you find. I'd be happy to help in any way way possible. Good luck! Let me know!
When you checked for leaks, did you smoke test the car? If so, did you smoke test the exhaust too? Have you checked where the headers mate up with the heads to make sure there's no gaps/leaks there? Normally, if it's hunting for an idle like that, it's going to be an air leak somewhere. The reason it's "hunting" for an idle is because with a leak after the MAF sensor, the car doesn't know how much air is actually coming in the engine.
I would smoke test the intake system, the vacuum lines and the exhaust. That's going to be the best way to try and find it.
Keep me posted though (feel free to PM me if you update this thread) and let me know what you find. I'd be happy to help in any way way possible. Good luck! Let me know!
03-27-2012, 10:57 PM
#6
AMChrisYoung,
Thanks for your suggestion. No, we did not smoke test it. I am going to take it back to the shop this week and tell them exactly what you said. This completely makes sense. The car is brand new and was working fine until the new parts. So, it makes sense that something was not put on correctly. I will keep you up to date.
Thanks for your suggestion. No, we did not smoke test it. I am going to take it back to the shop this week and tell them exactly what you said. This completely makes sense. The car is brand new and was working fine until the new parts. So, it makes sense that something was not put on correctly. I will keep you up to date.
03-28-2012, 03:55 PM
#7
AMChrisYoung,
Thanks for your suggestion. No, we did not smoke test it. I am going to take it back to the shop this week and tell them exactly what you said. This completely makes sense. The car is brand new and was working fine until the new parts. So, it makes sense that something was not put on correctly. I will keep you up to date.
Thanks for your suggestion. No, we did not smoke test it. I am going to take it back to the shop this week and tell them exactly what you said. This completely makes sense. The car is brand new and was working fine until the new parts. So, it makes sense that something was not put on correctly. I will keep you up to date.
Have a great night!
03-28-2012, 04:15 PM
#8
Gentleman's Relish
Join Date: Feb 2005
Location: AZ
Posts: 13,090
+1 in short, unmetered air getting into the intake will cause the 'hunting' idle.
That means to not only check the MAF is correctly installed (no gaps and flush) but also the PCV system. If the PCV hose is not on all the way or you have a breather attached to the tubing that goes into the intake (not the valve cover) the intake is pulling in unmetered air.
That means to not only check the MAF is correctly installed (no gaps and flush) but also the PCV system. If the PCV hose is not on all the way or you have a breather attached to the tubing that goes into the intake (not the valve cover) the intake is pulling in unmetered air.
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