Re: 1988 350 TBI idles funny, stalls when put in gear, and accels rough...
Quote:
Originally Posted by irongun324
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That is what is known as EGR vacuum solenoid (there are other names) - it is controlled by ECM. ECM pulse width modulates (PWM) ON-OFF amount of vacuum applied to EGR valve. When this valve is OFF the EGR connected side is vented to atmosphere (so that vacuum is removed from EGR valve diaphragm). In normal operation this valve is vibrating - ON -OFF determines how much vacuum is being applied to EGR valve. Expensive to replace when they go bad.
//RF
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"The Beast"
1975 Chevrolet C20 longbed
350/ 700R4! with 3inch body lift
Dual Flowmasters Super 40's!
TBI retrofit completed (2007-07-29)
New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)
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