Mean Green Posted September 3, 2021 Share Posted September 3, 2021 (edited) Hello all have a question and hoping I can get some answers I have a 673 that is natural aspirated I just added a turbo to .With the extra air it lacks in powe the truck never smoked before and I want to turn the pump up a bit to make it run a little better I have looked for a good pic of what to adjust but not exactly sure I know I should have changed the inj pump but don't have the one for a turbo I have a picture from the manual I'm including should I adj the screws marked 1 or the ones marked 2 and witch direction the manual really don't say I don't want to remove the pump to remove the screw from the front and I understand the adjustment is limited with the front screw left in any help or suggestions are welcome thanks Kevin Edited September 3, 2021 by Mean Green incorrect title Quote If your going to be a bear be a grizzly Link to comment https://www.bigmacktrucks.com/topic/67963-673-injection-pump-help/ Share on other sites More sharing options...
theakerstwo Posted September 3, 2021 Share Posted September 3, 2021 To give it more fuel you need to adjust the top stop screw.It needs to be set forward to let the rack go more into the pump.Not over two turns on the screw.It is a 7/16 nut on the screw. 1 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/67963-673-injection-pump-help/#findComment-479351 Share on other sites More sharing options...
Mean Green Posted September 3, 2021 Author Share Posted September 3, 2021 ok thank you hopefully I'll get into the pump this weekend and see what hapens Quote If your going to be a bear be a grizzly Link to comment https://www.bigmacktrucks.com/topic/67963-673-injection-pump-help/#findComment-479352 Share on other sites More sharing options...
Big R Posted September 25, 2021 Share Posted September 25, 2021 Curious if you got a chance to adjust your pump. Wondering how it worked out Quote Link to comment https://www.bigmacktrucks.com/topic/67963-673-injection-pump-help/#findComment-480430 Share on other sites More sharing options...
Mean Green Posted September 26, 2021 Author Share Posted September 26, 2021 worked out good I gave it a turn and a half and runs good I only bobtail so I don't pull any weight put a pryo on it and don't run hot Quote If your going to be a bear be a grizzly Link to comment https://www.bigmacktrucks.com/topic/67963-673-injection-pump-help/#findComment-480454 Share on other sites More sharing options...
Big R Posted September 26, 2021 Share Posted September 26, 2021 Nice. Goood to know Quote Link to comment https://www.bigmacktrucks.com/topic/67963-673-injection-pump-help/#findComment-480459 Share on other sites More sharing options...
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