code 51/ quits when returning to idle

professorbob · 10-19-2011, 07:53 PM

Car still operating rich and will not shift out of second gear and engine is being held to less than 2,000 under driving load.
Checked the Throttle Position Sensor TPS and it checks OK. Idle Control Valve ICV is carbonized and used some cleaner on the plunger. Is the plunger suppose to close completely? I can suck air through the port even when closed.
Any sources for replacement parts other than dealer.
The A/C is no longer cooling. It performed well for the time the vehicle was working. I had added a can of freeze 12 then. Non only warm air. Maybe this is the reason for the code 51.

I am looking for a safe way to check the vacuum hose joints. Suggestions. Someone suggested pressurizing the vacuum system at the hose from the carbon canister and applying bubble soap.
Still looking for source for form hoses. Any suggestions are appreciated.
So want to get back in the road again.
Is there a standard reason for tripping into limp home mode?
Thanks
Prof.

10-19-2011, 07:53 PM	#3
professorbob Intake Join Date: Nov 2007 Location: Lavonia Posts: 49	Idle Control Valve ?? Car still operating rich and will not shift out of second gear and engine is being held to less than 2,000 under driving load. Checked the Throttle Position Sensor TPS and it checks OK. Idle Control Valve ICV is carbonized and used some cleaner on the plunger. Is the plunger suppose to close completely? I can suck air through the port even when closed. Any sources for replacement parts other than dealer. The A/C is no longer cooling. It performed well for the time the vehicle was working. I had added a can of freeze 12 then. Non only warm air. Maybe this is the reason for the code 51. I am looking for a safe way to check the vacuum hose joints. Suggestions. Someone suggested pressurizing the vacuum system at the hose from the carbon canister and applying bubble soap. Still looking for source for form hoses. Any suggestions are appreciated. So want to get back in the road again. Is there a standard reason for tripping into limp home mode? Thanks Prof. Last edited by professorbob; 10-19-2011 at 07:56 PM.