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High EGT's

5667 Views 49 Replies 11 Participants Last post by  smcinrox
I have an early 99 F-350. The EGT's are running higher than they used to with no modifications being done to the truck. I checked to make sure my boot connections are tight but haven't had time to do a pressure test yet. I'm going to verify the EBPV isn't stuck in a slightly closed position (hopefully tonight). If the leak test turns out good and the EBPV is not stuck closed, I was thinking about purchasing a cat delete pipe for testing to see if the cat is causing a restriction. Does anyone have a suggested place to buy a cat delete pipe? Do the experts out there think I'm on the right track? Any additional suggestions would be appreciated.
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My early 99 had higher than normal EGTs from a pre-turbo exhaust leak. After fixing the leaks and adding a 6.0 intercooler it still runs hotter than some of the guys with the later trucks, but it is much better.

I'd check for up-pipe leaks before blaming the cat.
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