wastegate solenoid code

[johndeere01]

i have a 99 f350 7.3 powerstroke ,i'm having a funny noise coming from the turbo wastegate (i think) if i'm driving down the road at a steady speed and rpm it makes a ffffffffffffffffff noise, but if i let off the gas or get on the gas it goes away. i had my brother run a code scan and got a p1690 code , i replaced the wastegate control solenoid and the problem is still there. it seem only to do it in the winter time . does anyone know what voltage should be going to the solenoid

[fredwilliamson]

hope this helps...



KL1 DIAGNOSTIC TROUBLE CODE (DTC) P1690

• DTC P1690 indicates that the PCM has detected a failure on the WGC circuit.
• Possible causes:
  • short to ground
  • open in harness
  • damaged connection
  • damaged WGC solenoid
  • damaged PCM
  • blown fuse
• Disconnect the WGC solenoid harness connector.
• Key on, engine off.
• Measure voltage between Pin 2 (KEY PWR) on the WGC solenoid harness connector and ground.
• Key off.

Was voltage greater than 10.5 volts?
Yes No GO to KL2 . REPAIR open in (KEY PWR) Circuit 16, or REPLACE blown fuse. RESTORE vehicle. CLEAR DTCs and RETEST.
KL2 CHECK FOR OPEN IN CONTROL CIRCUIT

• Install breakout box; leave PCM disconnected.
• Measure resistance between Pin 1 on the WGC solenoid harness connector and PCM Test Pin 47.

Is resistance less than 5 ohms?
Yes No GO to KL3 . REPAIR open in Circuit 1275 (W/R). RESTORE vehicle. CLEAR DTCs and RETEST.
KL3 CHECK FOR SHORT TO GROUND

• Measure resistance between WGC solenoid harness connector Pin 1 and ground.

Is resistance greater than 10,000 ohms?
Yes No GO to KL4 . REPAIR short to ground on Circuit 1275 (W/R). RESTORE vehicle. CLEAR DTCs and RETEST.
KL4 CHECK WGC SOLENOID

• Measure resistance between Pin 1 and Pin 2 of WGC solenoid harness connector.

Is resistance less than 50 ohms?
Yes No REPLACE the PCM. RESTORE vehicle. CLEAR DTCs and RETEST. REPLACE the WGC solenoid. RESTORE vehicle. CLEAR DTCs and RETEST.

[klhansen]

Originally Posted by johndeere01

..... if i'm driving down the road at a steady speed and rpm it makes a ffffffffffffffffff noise, but if i let off the gas or get on the gas it goes away. ...... it seem only to do it in the winter time

I'll bet it's your EBP valve making the hissing noise. You can test that theory by unplugging the air temp sensor on the air filter box and see if it still does it. If not, it's your EBP system actiing like it was designed to. It's there to get the engine warmer quicker by increasing backpressure on the exhaust. It's only active below 45F outside temp and oil temp below 167F. Once the engine warms up, the EBP system is inactive. The EBP system is also disabled (the valve opens) if you mash the go pedal.

[johndeere01]

its 5 degrees here and i will try to unplug the ebp valve as soon as i can and get back to let yall know