Join Date: Dec 2010
My Ride: 1992 Dodge Shadow
Engine: 2.2 Turbo 1
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Backpressure EGR cause 0 vaccum?
Ok my vacuum at idle use to be at 9-11 HG but something changed and now I can't boost past 4psi and have ZERO vacuum at idle. I hear a huge boost leak but all hoses are still on tight, no holes on my FMCI and when I try to do a boost leak test all psi leaks out my EGR. I used a mighty vacuum pump to close the EGR and I could still hear psi leaking out of it.... And at no time the psi gauge holds steady, leaks all out.
Main question, can the dumb backpressure EGR cause 0 vaccum at idle? Over time my HG vacuum at idle has slowly decreased....Highest it's ever ever been is 12hg and my timing is verified twice to be good, same with ignition timing. Any help will be appreciated because I'm at the giving up point until I get rid of this 1988 engine to my 1993 fully built motor
1992 Dodge Shadow (1988)2.2 turbo 1 FMIC-TE04H-Stage 1SBEC-2.5 exhaust-Walbro 255-Vacuum block,non-turbo valve cover. Computer boost to 11 psi