External fuel pump
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Vincent -
The new O2 sensor is in. I grounded very near the sensor to the exhaust flange that connects on of the headers to a pipe, and to the frame. I filed the frame to ensure good contact. Reading is a constant .2.
Codes are still 41 and 34. I'm going to take it for a ride and test again. I'll let you know if the results change.
By the way, if you remember there are two hoses that connect to the vacuum reservoir, one red, one black. Can't remember if we determined yesterday if there is suction in the red hose. There is plenty of suction. I tested it.
I can hear the replies now...
Steve
The new O2 sensor is in. I grounded very near the sensor to the exhaust flange that connects on of the headers to a pipe, and to the frame. I filed the frame to ensure good contact. Reading is a constant .2.
Codes are still 41 and 34. I'm going to take it for a ride and test again. I'll let you know if the results change.
By the way, if you remember there are two hoses that connect to the vacuum reservoir, one red, one black. Can't remember if we determined yesterday if there is suction in the red hose. There is plenty of suction. I tested it.
I can hear the replies now...
Steve
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Yes, a little different but the parts function the same. You showed me the back of the engine with diverter valve as part of the thermactor unit, the air pump unit and thermator valve, and the 4 solenoids that are under the box.
And my 85 is EFI.
And my 85 is EFI.
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Interesting happening. After the run I checked codes again. 34 cleared. I checked again. It came back. I went for another run. 34 cleared again. Checked again and it was back. Does that make any sense at all?
41 is still with us.
41 is still with us.
He will not be able to clear Code 34 until he gets proper vacuum to the EGR. Seems he found a leak at the Vacuum Manifold that supplies the Vacuum to the EGR Control Solenoid & and the TADiverter/TABy-pass Solenoids. He did find that his Vacuum Reservoir in the soure vacuum path was blocked, he cleared the blockage. For now he has plugged the source vacuum line (red tubing) leading back to the intake vacuum cluster.
His Code 41, may be his O2 Sensor and the Ground, but maybe other issues. He has an O2 sensor on order, and understands the O2 grounding issues.
Yes, he cleared Code 13 using the idle instructions provide.
His Code 41, may be his O2 Sensor and the Ground, but maybe other issues. He has an O2 sensor on order, and understands the O2 grounding issues.
Yes, he cleared Code 13 using the idle instructions provide.
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Sure!
Your diagram shows 9D474 (4 solenoids) that, on my vehicle, sit against a the back of a box (not shown in your diagram) that overhangs the entire solenoid unit. The box is approximately 7 inches wide and 10 inches tall. Up close to the overhang are hose connectors where two hoses that come from a plastic vacuum manifold. That plastic manifold has a series of other hoses attached to it. That plastic manifold attaches to inlets at the base of the solenoids. The other side of the box contains the bladder or diaphragm.
Your diagram shows 9D474 (4 solenoids) that, on my vehicle, sit against a the back of a box (not shown in your diagram) that overhangs the entire solenoid unit. The box is approximately 7 inches wide and 10 inches tall. Up close to the overhang are hose connectors where two hoses that come from a plastic vacuum manifold. That plastic manifold has a series of other hoses attached to it. That plastic manifold attaches to inlets at the base of the solenoids. The other side of the box contains the bladder or diaphragm.
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From: Easton,Ks
CM codes do not clear so you must be talking about the KOEO or KOER code 34:
Service Code 34 in Key On Engine Off or Engine Running Self-Test indicates that the EGR valve and/or EGR Valve Position (EVP) sensor may not be fully seated in the closed position. The EVP sensor voltage is greater than the closed limit voltage of 0.67 volts. Because of the preload on the installed EVP sensor, it is very difficult to determine whether the EGR valve is seated or the EVP sensor is in contact with the EGR valve stem.
Possible causes:
-- Poor continuity in EVP sensor harness.
-- Non-seated EGR valve.
-- Damaged EGR valve.
-- Damaged EVP sensor.
-- Damaged EVR solenoid.
-- Damaged processor.
Service Code 34 in Key On Engine Off or Engine Running Self-Test indicates that the EGR valve and/or EGR Valve Position (EVP) sensor may not be fully seated in the closed position. The EVP sensor voltage is greater than the closed limit voltage of 0.67 volts. Because of the preload on the installed EVP sensor, it is very difficult to determine whether the EGR valve is seated or the EVP sensor is in contact with the EGR valve stem.
Possible causes:
-- Poor continuity in EVP sensor harness.
-- Non-seated EGR valve.
-- Damaged EGR valve.
-- Damaged EVP sensor.
-- Damaged EVR solenoid.
-- Damaged processor.
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Yes, KOER code 34.
CM codes do not clear so you must be talking about the KOEO or KOER code 34:
Service Code 34 in Key On Engine Off or Engine Running Self-Test indicates that the EGR valve and/or EGR Valve Position (EVP) sensor may not be fully seated in the closed position. The EVP sensor voltage is greater than the closed limit voltage of 0.67 volts. Because of the preload on the installed EVP sensor, it is very difficult to determine whether the EGR valve is seated or the EVP sensor is in contact with the EGR valve stem.
Possible causes:
-- Poor continuity in EVP sensor harness.
-- Non-seated EGR valve.
-- Damaged EGR valve.
-- Damaged EVP sensor.
-- Damaged EVR solenoid.
-- Damaged processor.
Service Code 34 in Key On Engine Off or Engine Running Self-Test indicates that the EGR valve and/or EGR Valve Position (EVP) sensor may not be fully seated in the closed position. The EVP sensor voltage is greater than the closed limit voltage of 0.67 volts. Because of the preload on the installed EVP sensor, it is very difficult to determine whether the EGR valve is seated or the EVP sensor is in contact with the EGR valve stem.
Possible causes:
-- Poor continuity in EVP sensor harness.
-- Non-seated EGR valve.
-- Damaged EGR valve.
-- Damaged EVP sensor.
-- Damaged EVR solenoid.
-- Damaged processor.
yes his truck uses injectors. It's EFI.
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Here a pic of one laying on the back side, and going from side to side. Note the two little inlets to the upper center (left) of the unit.