3406b exhaust temps too high - Page 2 - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by Vindicator240, this thread has received 12 replies and been viewed 1634 times.

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post #11 of 13 (permalink) Old 07-06-2018, 04:21 PM
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Vindicator, I am curious if you found the cause of this?
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post #12 of 13 (permalink) Old 06-07-2019, 04:59 PM Thread Starter
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Sorry it’s been so long, the cause was that the fuel was turned up too high previously and with the bigger nozzles it made it that much worse

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post #13 of 13 (permalink) Old 06-15-2019, 11:08 AM
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Originally Posted by Vindicator240 View Post
Sorry itís been so long, the cause was that the fuel was turned up too high previously and with the bigger nozzles it made it that much worse
Unless structeral failure or bowl quench is reached in fuel delivery, which for a DITA mechanical Cat is around 2200HP unmodified for flow, there is no such thing as too much fuel. It's timing. The original nozzle number, 0R3424, is really only used in early PEEC engines. Converting a PEEC to mechanical it is easy to miss something on, plus timing needs compensated for a different rise rate in the advance and a slower valve cam. 19* @ 1000rpm with the start screw at 1260rpm and no stop screw. Also your replacement nozzle is a 3423 not a 3421. 3421's are for 14.5 piston bowls and 3423's are for 15.2's. Most likely the advance spool is'nt coming up so you're not getting actual advance. That's the only way you can move timing all around and have no change. If the advance is working right there's kinda no way you didn't get real close one of the times.
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