Summary for what's been worked on in the engine bay.
Previous Owner
Installed Short Ram CAI
New Radiator (I believe aftermarket but will check later if OEM)
JANKY aftermarket exhaust (If you saw the welds on this thing you would throw up)
New
Fuel Injectors
Fuel Pump Relay
New VTCS solenoid
New VICS solenoid
New Spark Plugs
New Coil Packs w/ wires
Cleaned
MAF Sensor
CAI Filter
EGR Valve
IAC Valve
Throttle Body
Intake Manifold
Check Engine Light Codes
P0660 - Secondary Shutter Valve Open
P2009 - Intake Manifold Runner Control Circuit Low Bank 1
NO P0171 so no vac leaks, I even still doubted and sprayed around intake manifold for any leaks but no changes.
So to not summarize this time at idle STFT is at +25 and LTFT at -25 at idle, car was driving fine for a couple hours some rough idle issues but progressively got worse throughout the night. Had a feeling it was my fuel pressure sensor as when I disconnected it from the solenoid car ran the same exact way. Tested the solenoid with some jumper wires and clicks fine. Vacuum flows correctly so not that, no hole in the lines either. The craziest part about all of this is that when I step on the gas or drive it is smooth sailing. If I feather the gas (In park) the STFT stays between -5 and +5, LTFT stays at +4. When actually driven readings are also normal. Along with this I watched my O2 sensor voltage at idle. O2 sensor 1 - 0.07v. O2 sensor 2 - 0.04v and same freakin thing with the car at least getting gassed reading will go back to normal such as each sensor reading between +0.10v and 1.00v while rapidly changing. After seeing the rough idle I had the car turned off and turned back on, RPMS will go between 100 (Sounds like I have big ass cams installed) and 1100 RPMS for about 5 second and then ROUGH idle at 650 RPMS. Give it 15 seconds and it'll start the whole process over again with jumping and rough idling. I noticed I also have an issue with my fuel pump not starting the pressurization process with the key in the ON position (Just silence even with the seat pulled up and metal cover taken off) , pump will turn on with Ignition so car always starts. I even tested the pump with jumper wires in the engine bay and pump activated perfectly. The car actually runs better the less it idles and what I mean by that is if I drive around without stopping the idle is less rough and usually doesn't get rougher (EX: RPMS dropping or building) it sits pretty well.
My guesses for what's wrong are:
Faulty Fuel Pump
Faulty Fuel Pump Wires
Hole in exhaust manifold
Faulty CAT
I love the hell outta this car and can't figure what's wrong with it this time. If any experts and/or enthusiasts can help out with any guesses it would greatly be appreciated.
Previous Owner
Installed Short Ram CAI
New Radiator (I believe aftermarket but will check later if OEM)
JANKY aftermarket exhaust (If you saw the welds on this thing you would throw up)
New
Fuel Injectors
Fuel Pump Relay
New VTCS solenoid
New VICS solenoid
New Spark Plugs
New Coil Packs w/ wires
Cleaned
MAF Sensor
CAI Filter
EGR Valve
IAC Valve
Throttle Body
Intake Manifold
Check Engine Light Codes
P0660 - Secondary Shutter Valve Open
P2009 - Intake Manifold Runner Control Circuit Low Bank 1
NO P0171 so no vac leaks, I even still doubted and sprayed around intake manifold for any leaks but no changes.
So to not summarize this time at idle STFT is at +25 and LTFT at -25 at idle, car was driving fine for a couple hours some rough idle issues but progressively got worse throughout the night. Had a feeling it was my fuel pressure sensor as when I disconnected it from the solenoid car ran the same exact way. Tested the solenoid with some jumper wires and clicks fine. Vacuum flows correctly so not that, no hole in the lines either. The craziest part about all of this is that when I step on the gas or drive it is smooth sailing. If I feather the gas (In park) the STFT stays between -5 and +5, LTFT stays at +4. When actually driven readings are also normal. Along with this I watched my O2 sensor voltage at idle. O2 sensor 1 - 0.07v. O2 sensor 2 - 0.04v and same freakin thing with the car at least getting gassed reading will go back to normal such as each sensor reading between +0.10v and 1.00v while rapidly changing. After seeing the rough idle I had the car turned off and turned back on, RPMS will go between 100 (Sounds like I have big ass cams installed) and 1100 RPMS for about 5 second and then ROUGH idle at 650 RPMS. Give it 15 seconds and it'll start the whole process over again with jumping and rough idling. I noticed I also have an issue with my fuel pump not starting the pressurization process with the key in the ON position (Just silence even with the seat pulled up and metal cover taken off) , pump will turn on with Ignition so car always starts. I even tested the pump with jumper wires in the engine bay and pump activated perfectly. The car actually runs better the less it idles and what I mean by that is if I drive around without stopping the idle is less rough and usually doesn't get rougher (EX: RPMS dropping or building) it sits pretty well.
My guesses for what's wrong are:
Faulty Fuel Pump
Faulty Fuel Pump Wires
Hole in exhaust manifold
Faulty CAT
I love the hell outta this car and can't figure what's wrong with it this time. If any experts and/or enthusiasts can help out with any guesses it would greatly be appreciated.