Help with HPT on Start up
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From: Shelby Twp. Mich
Help with HPT on Start up Ok after 408 install ,The puter was rescaled for the 42# injectors.Now it is Dumping Fuel,I have to throttle it big time for a while to keep it running.So I tried to start a couple of times and pulled a Plug and sure enough it was soaked with gas....Where do I start????
Thanks for your Help....
Thanks for your Help....
Did you rescale for the 408 displacement? Recheck the
injector flow table values for sanity?
Open loop fuel air commands a lot of enrichment on
cold starts and high idle MAP both aggravates, and
maybe feeds back on overenrichment. VE table errors
in that direction are also commonplace on cam upsizes
(or in this case maybe just a part of the new combo
up against an old motor's tune).
If you get the values being commanded then hit the
OLFA table. If you're getting more fuel than the PCM is
telling you then rework the low speed end of the VE
table.
injector flow table values for sanity?
Open loop fuel air commands a lot of enrichment on
cold starts and high idle MAP both aggravates, and
maybe feeds back on overenrichment. VE table errors
in that direction are also commonplace on cam upsizes
(or in this case maybe just a part of the new combo
up against an old motor's tune).
If you get the values being commanded then hit the
OLFA table. If you're getting more fuel than the PCM is
telling you then rework the low speed end of the VE
table.
