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This stands for Small Block Chevrolet. The engine debuted in 1955 and remained largely unchanged until 1986. The initials are still used today to d...
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Re: Failed Smog....

Subject: Re: Failed Smog....
by Schrade on 2014/10/15 12:39:00

Quote:

bogus wrote:
ok... checked lotsa stuff, still one more thing to check.

However, the various vacuum lines that feed to the EGR were compromised.

The hard line was fitted to a rubber line, and the rubber line was just big enough to not allow a seal to occur. If I was losing vacuum around that connection, well, gee, by all means, I had a problem!



Are you sure that EGR vac supply was 'broken'?

Seems to me that ECM looks for vacuum to hold for x seconds (with EGR solenoid valve closed (or open?) ), and if it doesn't hold for x seconds, then you get a 32 DTC SES, or it comes up as H DTC...

Isn't that how it operates?
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