egr valve
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Freshman User
Joined: Feb 2004
Posts: 39
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From: south georgia
egr valve
[QU
OTE]shoot first ask questions later![/QUOTE]
ihave a problem wit my truck idleing like crap.ihave al ways used starting fluid to help find vacuum leaks.when i shoot it on the egr valve it suks it in and chnges the idle.it seems to be sucking it in through the to little holes on the top of thr housing.could this be my idle problem?it also misses at hi way cruising speed.
OTE]shoot first ask questions later![/QUOTE]
ihave a problem wit my truck idleing like crap.ihave al ways used starting fluid to help find vacuum leaks.when i shoot it on the egr valve it suks it in and chnges the idle.it seems to be sucking it in through the to little holes on the top of thr housing.could this be my idle problem?it also misses at hi way cruising speed.
Senior User
Joined: Feb 2004
Posts: 116
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From: Northwest
It does indeed sound like it's malfunctioning. It could be the EGR valve itself or one of the sensors that controll it. The EGR system on our trucks can make them buck, stumble and miss even when they do work right.
You may just want to block it off at the manifold and see if it cures your problem. You can just loosen the bolts between the EGR valve and the intake manifold and slide in a piece of sheetmetal to block the hole and tighten up the bolts. It will problably cure your drivablility problem...... however it will set off your "check engine light" for insufficient EGR flow...... but thats not a big deal. Your not a real FORD enthousiast untill that light is on anyhow.
You may just want to block it off at the manifold and see if it cures your problem. You can just loosen the bolts between the EGR valve and the intake manifold and slide in a piece of sheetmetal to block the hole and tighten up the bolts. It will problably cure your drivablility problem...... however it will set off your "check engine light" for insufficient EGR flow...... but thats not a big deal. Your not a real FORD enthousiast untill that light is on anyhow.
Cross-Country
Joined: Mar 2003
Posts: 77
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From: Springfield, Or.
Aah, found the thread I was looking for. Question.. after blocking off the EGR (or unplugging and capping the vacuum line) will the engine run rich/lean? Will it matter to the O2 sensor?
Thanks !
Thanks !
Senior User
Joined: Feb 2004
Posts: 116
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From: Northwest
No, it won't make any difference on how the engine runs reguarding rich or lean condition. The O2 sensor "might" richen it up to compensate for more oxygen.......... but not enough to affect your mileage.
Disconnecting the vacume line that runs to the EGR valve is certainly the easiest way to bypass it. Just make sure that the valve isn't leaking or faulty to begin with. If it is leaking then just unplugging the vacume line won't work.
Disconnecting the vacume line that runs to the EGR valve is certainly the easiest way to bypass it. Just make sure that the valve isn't leaking or faulty to begin with. If it is leaking then just unplugging the vacume line won't work.
Elder User
Joined: Nov 2003
Posts: 752
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From: Kalispell, MT
where exactly is the EGR valve located? is this the round, approx. 1" thick piece that is hooked to a flat "plate" of sorts that a metal hose goes to from the exhaust manifold, towards the front of the engine from below the carbeurator?
MontanaFord
MontanaFord
Cross-Country
Joined: Mar 2003
Posts: 77
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From: Springfield, Or.
Pat,
Thanks. I went for a long drive last night, changed my mpg right back up to 21 hwy where it should be. It was running pretty bad (hesitating) at 15 hwy. I still feel a slight vibration at higher speeds, time to check my timing I think. Also, I think this weekend I'm reaming out the cat.
Thanks. I went for a long drive last night, changed my mpg right back up to 21 hwy where it should be. It was running pretty bad (hesitating) at 15 hwy. I still feel a slight vibration at higher speeds, time to check my timing I think. Also, I think this weekend I'm reaming out the cat.
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Elder User
Joined: Nov 2003
Posts: 752
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From: Kalispell, MT
Originally posted by Patrick_PDX
Your not a real FORD enthousiast untill that light is on anyhow.
Your not a real FORD enthousiast untill that light is on anyhow.
MontanaFord
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Brett Foote
Cross-Country
Joined: Mar 2003
Posts: 77
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From: Springfield, Or.
Montana,
Mine's EFI so I don't know if you have an EGR valve, but it sounds like you're describing one.
As far as the lights, the one that I now have on stating to 'check engine', I'm with you, I "check my engine" quite often, especially when I check for top acceloration
)
Mine's EFI so I don't know if you have an EGR valve, but it sounds like you're describing one.
As far as the lights, the one that I now have on stating to 'check engine', I'm with you, I "check my engine" quite often, especially when I check for top acceloration
)
Senior User
Joined: Feb 2004
Posts: 116
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From: Northwest
Yeah Montana, if your engine runs and the rest of your truck is sorta falling apart......... you can be in the club.
EGR valve is between intake manifold and the metal pipe that runs up from the exhaust manifold.
I think that pollution controlls are a good thing, I would never disconnect anything unless it is malfunctioning. I still have my cats and air pump. It's too bad that the EGR system is prone to failure long before any of the other componets.
EGR valve is between intake manifold and the metal pipe that runs up from the exhaust manifold.
I think that pollution controlls are a good thing, I would never disconnect anything unless it is malfunctioning. I still have my cats and air pump. It's too bad that the EGR system is prone to failure long before any of the other componets.
Elder User
Joined: Nov 2003
Posts: 752
Likes: 0
From: Kalispell, MT
I'll eventually be building a motor that has little or no emissions, and only the bare neccessity of vacume lines and electrical...i hate anything that makes my vehicle complicated (i.e. computers, emissions controls, wiring, etc.)
MontanaFord
MontanaFord
Elder User
Joined: Nov 2003
Posts: 752
Likes: 0
From: Kalispell, MT
i finally went and picked up the spare motor i bought from a buddy, and i'm thinking that i may just use it as my builder-motor, and run the one i have in my truck currently, until my builder is finished...
MontanaFord
1984 F-150 4x4 300-6 (very tired) 4 spd 3:55 gears 297,000 miles, original to my knowledge....
MontanaFord
1984 F-150 4x4 300-6 (very tired) 4 spd 3:55 gears 297,000 miles, original to my knowledge....