There is a thread here about a tpc install. Front what I understand, there were various iterations of the kit with different controllers (or lack thereof). Typically, control was very simple: fuel delivery to the seventh injector was based on (a) rpm, and (b) vacuum. This is the only info sent to the controller. So, perhaps you have a vacuum leak. Otherwise, perhaps the controller is ****************ered. I think tpc will replace/reprogram if asked. Finally, this may just be how the beast operates - I've read in a variety of places that their seveth injector approad Twithout remap or timing revisions) was imperfect at the best of times).
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