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. Iām hoping to rally any troops in the north Florida area to help me get these final details ironed out. Thanks in advance, John |
emerygt350 |
Mar 23 2022, 02:08 PM
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#2
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Advanced Member Group: Members Posts: 2,145 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
No kidding. Looks like new. Maybe better.
1 should be fine as long as the port on the distributor isn't going anywhere. Is there a vacuum line on the dizzy? It may not have a port, depends on the model of 123. |
Morph914 |
Mar 24 2022, 06:33 AM
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#3
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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 |
No kidding. Looks like new. Maybe better. 1 should be fine as long as the port on the distributor isn't going anywhere. Is there a vacuum line on the dizzy? It may not have a port, depends on the model of 123. There is a port on the dizzy, I have been experimenting with it on and off, seems to run better with it off. The engine is an early ā73 2.0, it originally had a 1.7 |
emerygt350 |
Mar 24 2022, 07:56 AM
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#4
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Advanced Member Group: Members Posts: 2,145 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
No kidding. Looks like new. Maybe better. 1 should be fine as long as the port on the distributor isn't going anywhere. Is there a vacuum line on the dizzy? It may not have a port, depends on the model of 123. There is a port on the dizzy, I have been experimenting with it on and off, seems to run better with it off. The engine is an early ā73 2.0, it originally had a 1.7 Ahh! That explains the advance port on the TB. My 73 has the same dizzy and it really likes the advance port attached (to the correct port on the TB) but you do need to make sure the timing is good. I do it by feel, idle, and performance, then double check with a light. Mine is on #1 with advance connected, very happy. Is it a big difference between advance and not? No, but I like it. I am running about 36-37 all in currently. Engine is running cool and AFR looks good. Idles at 900 (well, at least that is what the gauge says). No stumbles anywhere. This is a 9/72 build date GA engine. I tried running the retard setting, and it worked fine, but no real point in doing that. 29 psi on the fuel pressure gauge. |
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