help with engine code....P0505

[egibbs123]

Check engine light is on. The code that came up is P0505. Anyone have this problem before? Assuming its a vacuum leak but unable to pin point exactly where its at if that is what is triggering it...

[Black4DrEK]

Spray throttle body cleaner on every gasket, ect.. and find the leak...

If you havent allready done it.

[Barefoot]

Spray throttle body cleaner on every gasket, ect.. and find the leak...

If you havent allready done it.:goodjob::goodjob: best thing u can do without a machine.

[egibbs123]

thanks for the input....

[Tech5]

Spray throttle body cleaner on every gasket, ect.. and find the leak...

If you havent allready done it.
:no: :no: :no: :no:









First off, the code you're getting (P0505) same as CEL 14,
P0505/Code 14 is Idle Control SYSTEM malfunction,

Possible Causes:

-IACvalve mechanical malfunction
-Throttle body clogged port, improper adjustment
-Intake manifold gasket leakage
-Intake airhose loose leakage
-Vacuum leak
-ECT sensor incorrect output
-Throttle Posistion Sensor incorrect output
(for the TPS incorrect output, this might be only for motors made in '96)

Try an check these things.

Start the motor, hold rpms at 3000 until the radiator fan comes on, then let it idle.
Check TPS, with the throttle fully closed, the TPS should be around 10%
(coolant temp should be around 200 degrees, give or take 5 degress or so.)

if your idle is above 550, check for vacuum leaks. Take the intake off, put your finger over the lower port in the throttle body. if the idle doesnt drop, check for vacuum leaks, make sure the throttle valve is closed completely.
if the idle does drop, adjust the idle speed. if you cannot adjust, replace IACv.

if the idle is less than 550, do the following:
disconnect the connector from the IACv.
(for A/T, d167y) if the engine speed doesnt increase, replace IACv. if it dies increase, adjust the (base) idle speed, clean the ports in the throttle body as necessary.

(for B16A2, d16y5,y8)if the engine speed drops or stalls, adjust the (base) idle speed, clean the ports in the throttle body as necessary. if the engine speed doesnt drop, or doesnt stall, replace IACv.

[Black4DrEK]

^^ wasnt sure of the CODE!

Good write up for his problem...

[egibbs123]

Thanks Tech5... big help