Might as well ask for some help
So back story, I own an automatic 07 Mustang Shelby GT (not GT500). I bought it used with about 69k miles on it.
I self installed FRPP hot rod cams, intake manifold, and throttle body. Had Bama tune for that while I waited to have the next set of mods installed.
Next I took the car to a shop to have Pypes LT headers, short H-Pipe, and high flow cats installed as well as 4.10 FRPP gears. Once again had a new tune from Bama for this set of mods.
Car ran great for a while. But as of the last few weeks the idle has been not so good.
I have the idle set at 650 and the car goes anywhere from ~580 all the way up to ~800.
So it will idle around the set rpm but every few seconds it will jump in rpms then it will dip stay around 650 then go up and then down and so on and so forth.
In an attempt to fix the issue I swapped back to the older tune from Bama that ran almost flawlessly before and the same issue was going on so I went back to the newest tune.
I cleaned MAF sensor and air filter and it sort of ran better but not much. I replaced MAF afterwards and pretty much the same.
Next I swapped out the spark plugs with the updated Ford oem plugs (a fantastic job to diy btw). Also changed the coil on plugs with MSD Blasters.
This was more so to get the whole spark plug job out of the way than anything else but either way it still didn't help the problem.
Have had car go through idle relearn thing multiple times with parking break and ac and such and car idle still jumps around after each relearn.
I read a lot online on forums about exhaust leaks and vacuum leaks. I jacked up the car and resealed around all the clamps on headers, mid pipe, and cats. That was the single thing that did the most but car idle still jumps and dips anywhere from 100-150 rpms.
Next I checked for vacuum leaks around the hoses on the passenger side from the valve cover to right before the throttle body, the PCV valve thing, the hose behind the intake manifold, the hose right above the PCV hose, the hose going to the fuel rail, the valve covers, the intake manifold seals, and from my limited knowledge nothing seemed out of the ordinary.
Car does die when disconnecting the PCV hose on the drivers side.
I tested battery and alternator. Battery tested at 12.55V and with car on it tested 14.65V
I will also add that during all of this not one single code ever came up. When I hook up the tuner it does not detect any codes other than P1000 which is understandable since I disconnected the battery the other day to do the spark plug job.
Another thing I will add is that when I turn the key to the on position (not turning the car on) if I wait a bit the CEL will blink 6 times. Said light has never blinked while car is on.
I have the Bama Revx tuner and have done datalogs but I will say I really don't know what I'm supposed to be looking for.
I honestly don't know what to do at this point.
Any help or guidance would be much appreciated
So back story, I own an automatic 07 Mustang Shelby GT (not GT500). I bought it used with about 69k miles on it.
I self installed FRPP hot rod cams, intake manifold, and throttle body. Had Bama tune for that while I waited to have the next set of mods installed.
Next I took the car to a shop to have Pypes LT headers, short H-Pipe, and high flow cats installed as well as 4.10 FRPP gears. Once again had a new tune from Bama for this set of mods.
Car ran great for a while. But as of the last few weeks the idle has been not so good.
I have the idle set at 650 and the car goes anywhere from ~580 all the way up to ~800.
So it will idle around the set rpm but every few seconds it will jump in rpms then it will dip stay around 650 then go up and then down and so on and so forth.
In an attempt to fix the issue I swapped back to the older tune from Bama that ran almost flawlessly before and the same issue was going on so I went back to the newest tune.
I cleaned MAF sensor and air filter and it sort of ran better but not much. I replaced MAF afterwards and pretty much the same.
Next I swapped out the spark plugs with the updated Ford oem plugs (a fantastic job to diy btw). Also changed the coil on plugs with MSD Blasters.
This was more so to get the whole spark plug job out of the way than anything else but either way it still didn't help the problem.
Have had car go through idle relearn thing multiple times with parking break and ac and such and car idle still jumps around after each relearn.
I read a lot online on forums about exhaust leaks and vacuum leaks. I jacked up the car and resealed around all the clamps on headers, mid pipe, and cats. That was the single thing that did the most but car idle still jumps and dips anywhere from 100-150 rpms.
Next I checked for vacuum leaks around the hoses on the passenger side from the valve cover to right before the throttle body, the PCV valve thing, the hose behind the intake manifold, the hose right above the PCV hose, the hose going to the fuel rail, the valve covers, the intake manifold seals, and from my limited knowledge nothing seemed out of the ordinary.
Car does die when disconnecting the PCV hose on the drivers side.
I tested battery and alternator. Battery tested at 12.55V and with car on it tested 14.65V
I will also add that during all of this not one single code ever came up. When I hook up the tuner it does not detect any codes other than P1000 which is understandable since I disconnected the battery the other day to do the spark plug job.
Another thing I will add is that when I turn the key to the on position (not turning the car on) if I wait a bit the CEL will blink 6 times. Said light has never blinked while car is on.
I have the Bama Revx tuner and have done datalogs but I will say I really don't know what I'm supposed to be looking for.
I honestly don't know what to do at this point.
Any help or guidance would be much appreciated