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Originally Posted by lietuviai
Sounds good. It looks like the egr is about to mysteriously fall off.
Isn't there an MAF on the '87 603?
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That's the unit I bypassed when trying to diagnose why my SDL wasn't seeing full boost fuel enrichment.
I figure by being rid of that, the cat in the downpipe, and hacking the air intake box you'd pick up at least 15rwhp... five for each one. That'd be at the minimum. But by dumping cats I've seen higher numbers than that alone... not to mention lower EGTs.