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1995 5.7L TBI EGR QUESTION
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deanblough
New User
Aug 20, 2009, 9:59 AM
Post #1 of 5
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1995 5.7L TBI EGR QUESTION
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Have a 32 code for EGR, I re-routed the vacuum from the carb to EGR solinoid to EGR valve to apply vacuum (not hand pump avail) and there was good vacuum but no reaction but push on diapham got re-action. This action should have gotten a re-action applying the vacuum correct?
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 20, 2009, 10:04 AM
Post #2 of 5
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Re: 1995 5.7L TBI EGR QUESTION
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If your saying that when you pushed the diaphragm with your finger, the engine tried to stall but nothing happend when you applied vacuum to the valve (engine running), then you likely have a bad valve. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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deanblough
New User
Aug 20, 2009, 10:07 AM
Post #3 of 5
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Re: 1995 5.7L TBI EGR QUESTION
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Thank you I will start with EGR Valve replacement on the 1st
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Loren Champlain Sr
Veteran
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Aug 20, 2009, 10:33 AM
Post #4 of 5
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Re: 1995 5.7L TBI EGR QUESTION
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Dean; A lot of these EGR valves are the backpressure type, meaning they won't open with a vacuum source unless they have backpressure. Might want to check that prior to replacing it. Ooops. Just checked. This is a negative backpressure type. It should open and hold vacuum with engine off. Loren SW Washington
(This post was edited by Loren Champlain Sr on Aug 20, 2009, 10:39 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 20, 2009, 11:06 AM
Post #5 of 5
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Re: 1995 5.7L TBI EGR QUESTION
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I did specify that the engine needed to be running when the vacuum was applied. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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