Code P0507 Help
Thread Starter
Teching In
Joined: Jun 2017
Posts: 37
Likes: 0
From: San Diego
Code P0507 Help I don’t know if this is the correct place for this question but I need help to diagnose. I don’t know if this is the correct place for this question but I need help to diagnose P0507.
A little background: I have 1500 miles on a freshly rebuilt LS1 engine, 241 stock heads, TSP 233/239 cam, FAST 92 mm intake and throttlebody. Car was professionally tuned with HP TINERS.
I had P0507 before and I checked wiring and installed a AC DELCO IAC, and issue persists.
Here is my freeze-frame data and I need help deciphering it:
P0507
Any help is greatly appreciated!
FREEZE FRAME DATA
Fuel Sys 1 CL
Fuel Sys 2 CL
Calc Load 4.7%
ECT 194 degrees
STFT B1 -0.8%
LTFT B1 0.0%
STFT B2 -0.8%
STFT B2 0.8%
MAP 14 (inHg)
Engine RPM 1166
Vehicle Speed 0 (mph)
MAF 1.83 (lb/min)
TPS 0.0%
A little background: I have 1500 miles on a freshly rebuilt LS1 engine, 241 stock heads, TSP 233/239 cam, FAST 92 mm intake and throttlebody. Car was professionally tuned with HP TINERS.
I had P0507 before and I checked wiring and installed a AC DELCO IAC, and issue persists.
Here is my freeze-frame data and I need help deciphering it:
P0507
Any help is greatly appreciated!
FREEZE FRAME DATA
Fuel Sys 1 CL
Fuel Sys 2 CL
Calc Load 4.7%
ECT 194 degrees
STFT B1 -0.8%
LTFT B1 0.0%
STFT B2 -0.8%
STFT B2 0.8%
MAP 14 (inHg)
Engine RPM 1166
Vehicle Speed 0 (mph)
MAF 1.83 (lb/min)
TPS 0.0%
Thread Starter
Teching In
Joined: Jun 2017
Posts: 37
Likes: 0
From: San Diego
Well, although nobody answered, I might have found the culprit. It turns out that the fresh air vent from the 92mm Warr TB was loose and causing a vacuum leak this affecting the idle and triggering the code for the IAC. I believe this in turn caused P0300.
LTFT (Long Term Fuel Trim) and STFT (Short Term Fuel Trim) where trying to compensate for the rich and lean conditions caused by the erratic idle.
I took off the elbow and tapped for a 1/4” NPT barbed fitting. While I was there I went ahead and re-did all my PCV hoses.
Drove it for over 40 minutes and seems like it has been taken care of. Idle is way better and under 950RPM
Last edited by Mikeypooh1; Apr 7, 2018 at 12:32 AM. Reason: Add a picture
