73 2.0 running *really* rich |
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73 2.0 running *really* rich |
rpc |
Jul 7 2017, 03:14 PM
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#1
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Member Group: Members Posts: 50 Joined: 18-May 11 From: Reston, VA Member No.: 13,084 Region Association: MidAtlantic Region |
History: We bought this '73 2.0 last summer. It ran ok at the time, though on cold start-up it would choke if we gave it throttle before it had a chance to warm up for a few minutes. We dropped the drivetrain in the fall to do a bunch of general cleanup on the engine and trans, including:
Today: We finally got everything back together and started the car but it was running really rich, so much so that we could barely keep it running. After we shut it off it wouldn't start again. It would spin fine, but not even a hint of firing. Things we've done:
So first, I think it's so badly flooded that we need to wait a day and/or pull the plugs so that the cylinders dry out. Second, I'm guessing that replacing the hoses fixed a bunch of air leaks, which some PO had compensated for by richening the mixture. I could very well be wrong, just a guess. I've read a good amount and have a basic understanding of the D-jet system, but I'm looking for pointers about where I should start in fixing this. If I'm right about the flooding we should be able to get it started. Then what do we need to start checking to address the rich running? |
rpc |
Jul 7 2017, 05:47 PM
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#2
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Member Group: Members Posts: 50 Joined: 18-May 11 From: Reston, VA Member No.: 13,084 Region Association: MidAtlantic Region |
Guys,
Thanks, great info. I'd read the car won't run without the CHT sensor connected and working, so I'd measured the resistance. It was 1034 ohms between the pigtail and the negative battery terminal at 85F ambient. The engine had run for a couple of minutes within the previous hour, as well. That seems to be in the right ballpark per Brad's info, right? If there's more I need to do there let me know. I've not checked the connection from the CHT sensor to the ECU (Rob, we're confident we got the same wire plugged onto the CHT sensor that we took off some months ago. And no worries -- my evening filled up, as it turns out.) We'll check the vacuum on the MPS per Brad's page. Might take a couple of days to get it done. My co-owner (the car's at his house) pulled all the plugs and said all of them were wet with gas. That means it's something systemic rather than injectors. Could be the CSV, though, so that will be on the to-be-checked list. So, MPS vacuum test and CSV leakage are the first two things to check. I'll be back as we get results. |
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