Final tune, Need help |
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Final tune, Need help |
Morph914 |
Mar 23 2022, 12:34 PM
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#1
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Member Group: Members Posts: 435 Joined: 22-August 16 From: St Augustine, FL Member No.: 20,326 Region Association: South East States |
Ok , so I have the engine running but it needs tuning. A little background, rebuilt stock 2.0 with D Jet, running a 123 dizzy. It fires right up and idles a little rough at first then smooths out. It revs fairly well and sounds good. The problem starts under load, it starts to stutter a bit.
I have not messed with the adjustment screw on the ECU or tried adjusting the throttle position sensor, or been able to check my fuel pressure. I’m hoping to rally any troops in the north Florida area to help me get these final details ironed out. Thanks in advance, John |
BeatNavy |
Mar 23 2022, 02:40 PM
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#2
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region |
There could be a number of things going on, but JamesM is always a great source on FI knowledge and troubleshooting.
Having said that, it won't run right until you get the proper tune selected for your 123 based on your specific FI setup (ECU, throttle body, etc.) AND get the timing dialed in. When I was running my 123 I was using curve "B" and retard only as my FI components were basically correct for a '74. I can't remember when curve "1" is correct, but you need to verify if that's correct for you. 123's are great once you navigate a couple of initial installation challenges. There are a couple of good threads out there on this, including this one: http://www.914world.com/bbs2/index.php?showtopic=324473 That engine and engine bay are beautiful (IMG:style_emoticons/default/beer.gif) |
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