87 F150 5.0 - Emissions - Air Diverter Valve
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87 F150 5.0 - Emissions - Air Diverter Valve
I checked the Air Diverter Valve (The one between the engine and the fire wall)with a vacuum and it will open but it losses the vacuum and closes. Is this normal or do I need to replace it. When I ran the codes, it had a 33 wich is EGR backpressure. Will this valve fix that problem?
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87 F150 5.0 - Emissions - Air Diverter Valve
Ok , The valve you applied the vacuum to is located exactly where on the engine ? The Air Diverter Valve ( At least what I think you mean ) is an emmision control related device that directs fresh air to the exhaust valves during cold engine operation to speed the warming of the convertor . What exactly is the problem youre having with the engine ?
Paul
Paul
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87 F150 5.0 - Emissions - Air Diverter Valve
>I checked the Air Diverter Valve
>(The one between the engine
>and the fire wall)with a
>vacuum and it will open
>but it losses the vacuum
>and closes. Is this
>normal or do I need
>to replace it.
Sounds like it needs to be replaced, but if you pass emissions then don't bother and just plug the vacuum port so it doesn't effect idle vacuum. Like Paul said, all it does is direct the air from the air pump to areas of the exhaust (head and cat) to aid in HC burnoff by the Catalytic converters. It should only open at idle.
>I ran the codes, it
>had a 33 wich is
>EGR backpressure. Will this
>valve fix that problem.
In a word, no. You need to check the EGR valve. That air diverter valve has nothing to do with the EGR valve.
the EGR valve connects the exhaust manifold with the intake manifold. Look for that connection, it should be on the intake manifold. Take it off and clean the needle valve inside.
Later.
Randy
>(The one between the engine
>and the fire wall)with a
>vacuum and it will open
>but it losses the vacuum
>and closes. Is this
>normal or do I need
>to replace it.
Sounds like it needs to be replaced, but if you pass emissions then don't bother and just plug the vacuum port so it doesn't effect idle vacuum. Like Paul said, all it does is direct the air from the air pump to areas of the exhaust (head and cat) to aid in HC burnoff by the Catalytic converters. It should only open at idle.
>I ran the codes, it
>had a 33 wich is
>EGR backpressure. Will this
>valve fix that problem.
In a word, no. You need to check the EGR valve. That air diverter valve has nothing to do with the EGR valve.
the EGR valve connects the exhaust manifold with the intake manifold. Look for that connection, it should be on the intake manifold. Take it off and clean the needle valve inside.
Later.
Randy
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