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Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Before everyone says one is N.O. and the other is N.C. respectively, I was wondering if the 1997173 is vented like the 1997171? Per the shop manual (see attached) it visually shows a non-vented for the 73 whereas the 71 is vented.
If I recall correctly the one I have is vented and is N.C.
Is this simply a miss interpretation in the manual or am I on the something or should I not be worried?
And, because I am experiencing a random Code 32 while running a Negative back Pressure EGR valve I'm also wondering if I should be running a positive? I'm running a L05 5.7 TBI with stock heads with TBI mods, shorty headers, high flow Cat. with 3" exhaust with an 89 5.7 Caprice ECM. Shop manual/parts list indicate needing a positive pressure for the L03 5.0 TBI but based on my mods, what do you think I should be running?
I've bought the positive backpressure EGR Valve PN: 19209971 241107. Based on online reviews... this also carries the PN: 17113496, 19210666, 2145575. I have a small stumble during cruise condition the moment that I apply gas under a load. Not knowing what valve I had from the factory and currently running a negative backpressure with mods, I'll give this a go.
