how much vaccum?
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how much vaccum?
I pulled the vaccum hose off my EGR vavle, and there was no vaccum when I put my finger over it. I reved the engine while feeling and still nothing. When should a vaccum be present at this valve? Thanks
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From: Durham
how much vaccum?
I believe that the vacuum gate will not open until you reach operating temp. If you have a computer driven vehicle, then there are probably other drivers/variables that determine when vacuum is applied to the EGR valve. My '82 runs to a port that screws into the top of the thermostat housing.
'82 F150 w/351W (orig 300 I6)
Slik
'82 F150 w/351W (orig 300 I6)
Slik
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how much vaccum?
Katt,
The Egr will only get vacuum after the engine is warmed to O/T . Plus if you have a newer or computer controlled engine , the Egr only operates when the vehicle is moving . It shouldnt get any vacuum at either idle or Wide open throttle . If you suspect trouble with its funtion , you can always put a tee in the line , run one hose to the Egr and another to a vacuum gauge inside and drive the truck to see that the Egr is only getting vacuum when it should be ... IE normal driving , cruising range .
Paul
The Egr will only get vacuum after the engine is warmed to O/T . Plus if you have a newer or computer controlled engine , the Egr only operates when the vehicle is moving . It shouldnt get any vacuum at either idle or Wide open throttle . If you suspect trouble with its funtion , you can always put a tee in the line , run one hose to the Egr and another to a vacuum gauge inside and drive the truck to see that the Egr is only getting vacuum when it should be ... IE normal driving , cruising range .
Paul
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how much vaccum?
Ive been getting a code 33 when accelerating in cold temps. Usually goes away after it reaches o/t. I was just looking at the valve today, and pulled the hose off for the fun of it. I guess I will replace the position sensor.
Thanks for the tips!
88 F150 351W
Thanks for the tips!
88 F150 351W
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how much vaccum?
Katt ,
Seems to me I recall Ford had a bunch of Egr vavles that would rattle , makes odd little noises when they were opening / open . From like 87 to 90 model yrs ? My 90 was doing it ...would sound like a tinny bell ringing . Apparently , when it opened , it wouldnt slide straight back but move from side to side causing the noise . The Evp sensor may not be getting the correct single or a fluctuating one if your vavle is doing like I described earlier ?
Paul
Seems to me I recall Ford had a bunch of Egr vavles that would rattle , makes odd little noises when they were opening / open . From like 87 to 90 model yrs ? My 90 was doing it ...would sound like a tinny bell ringing . Apparently , when it opened , it wouldnt slide straight back but move from side to side causing the noise . The Evp sensor may not be getting the correct single or a fluctuating one if your vavle is doing like I described earlier ?
Paul
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how much vaccum?
Katt ,
Maybe a vacuum leak ? Follow the egr hose back to its vacuum solenoid and verify all those hoses are secure and not broken .
Paul
Maybe a vacuum leak ? Follow the egr hose back to its vacuum solenoid and verify all those hoses are secure and not broken .
Paul
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how much vaccum?
>Katt,
> The
>Egr will only get vacuum
>after the engine is warmed
>to O/T . Plus if
>you have a newer or
>computer controlled engine , the
>Egr only operates when the
>vehicle is moving . It
>shouldnt get any vacuum at
>either idle or Wide open
>throttle . If you suspect
>trouble with its funtion ,
>you can always put a
>tee in the line ,
>run one hose to the
>Egr and another to a
>vacuum gauge inside and drive
>the truck to see that
>the Egr is only getting
>vacuum when it should be
>... IE normal driving ,
>cruising range .
>
>
>
> Paul
Paul
If I suspect trouble with its funtion
and I put a tee in the line , and run one hose
to the Egr and another to a vacuum gauge inside and drive the truck to see that the Egr is only getting vacuum when driving at normal cruising range how much vaccum preasure should I have ?
Thanks for any and all replies.
> The
>Egr will only get vacuum
>after the engine is warmed
>to O/T . Plus if
>you have a newer or
>computer controlled engine , the
>Egr only operates when the
>vehicle is moving . It
>shouldnt get any vacuum at
>either idle or Wide open
>throttle . If you suspect
>trouble with its funtion ,
>you can always put a
>tee in the line ,
>run one hose to the
>Egr and another to a
>vacuum gauge inside and drive
>the truck to see that
>the Egr is only getting
>vacuum when it should be
>... IE normal driving ,
>cruising range .
>
>
>
> Paul
Paul
If I suspect trouble with its funtion
and I put a tee in the line , and run one hose
to the Egr and another to a vacuum gauge inside and drive the truck to see that the Egr is only getting vacuum when driving at normal cruising range how much vaccum preasure should I have ?
Thanks for any and all replies.
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Senior User
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how much vaccum?
Katt,
if you have a vacuum gage, you can run the engine running self test. This test actuates the EVR solenoid for a few seconds and should pull about 5 inches HG at the EGR vacuum supply hose. I have done this before to trouble shoot the same code you are getting. There is a procedure for this in the hayes shop manual.
'92 F150 XL 4x4, 5.0L AOD, Headers, K&N Air Filter, 3.55 Gears, 31x10.5x15 Tires.
if you have a vacuum gage, you can run the engine running self test. This test actuates the EVR solenoid for a few seconds and should pull about 5 inches HG at the EGR vacuum supply hose. I have done this before to trouble shoot the same code you are getting. There is a procedure for this in the hayes shop manual.
'92 F150 XL 4x4, 5.0L AOD, Headers, K&N Air Filter, 3.55 Gears, 31x10.5x15 Tires.
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