Re IAH
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Junior User
Joined: Nov 2006
Posts: 50
Likes: 0
From: south fla.
Re IAH
Hi again
My question reguarding the glow plug relay and the intake air heater was because the IAH is cracked at one of the small post's and it is loose, and one of the big ones gets so hot I burned my hand when i touched it . The 350 is starting now but it takes a lot of turning over.
thanks
357fhp
My question reguarding the glow plug relay and the intake air heater was because the IAH is cracked at one of the small post's and it is loose, and one of the big ones gets so hot I burned my hand when i touched it . The 350 is starting now but it takes a lot of turning over.
thanks
357fhp
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
Intake air heater starting aid system operation.
The system is activated by the PCM when the ambient air temperature is below 0°C (32°F), the engine oil temperature is below 55°C (131°F) and the battery voltage is above 11.7 volts.
The intake air heater will stay on for 30 minutes as long as the engine is idling and the above conditions are met.
The intake air heating system will only activate once per "key on event". If the heater is activated and the vehicle is driven, the heater will not activate if the vehicle is taken back to idle.
The intake air is heated by using a heating element mounted into the compressor manifold.
The intake air heater relay switch, located next to the glow plug relay switch, supplies power to the intake air heater element.
Now if the relay is getting that hot i would suspect a short in the element or stuck closed relay.
The system is activated by the PCM when the ambient air temperature is below 0°C (32°F), the engine oil temperature is below 55°C (131°F) and the battery voltage is above 11.7 volts.
The intake air heater will stay on for 30 minutes as long as the engine is idling and the above conditions are met.
The intake air heating system will only activate once per "key on event". If the heater is activated and the vehicle is driven, the heater will not activate if the vehicle is taken back to idle.
The intake air is heated by using a heating element mounted into the compressor manifold.
The intake air heater relay switch, located next to the glow plug relay switch, supplies power to the intake air heater element.
Now if the relay is getting that hot i would suspect a short in the element or stuck closed relay.
