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Join Date: Jul 2010
Location: Cape Girardeau, MO
Posts: 1,087
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Hard start - 71 2.2 project with Zenith carbs

I'm continuing to try to accomplish at least one thing every day on my project. I found the steering wheel/horn parts I needed at EASY in SF, thanks Jim!

Meanwhile I received the female pin I need for my 14 pin connector to the engine harness so that I could connect my Intermediate Unit up to the + side of the coil and generate the proper Tach signal. After wiring it in I went to start the car to check the Tach. No luck. Hmm, it's always started before since the engine was installed in late winter/early spring. It cranked well and seemed like it was on the verge of over taking the starter and firing off, but would never go.

I read cold start threads and tried different techniques over the last 3 days and couldn't get it to go. I will note that the weather here in the midwest has finally gotten hot and humid as we normally expect in late June. Finally last night I resorted to some starter fluid and that did the trick. But it was popping and back firing at lower RPM's and if I didn't hold it over 2000 it would die. Once it got a little warm it would restart, but wasn't happy to idle. Popping and back fires says lean to me, but I thought if the air was warmer and more humid that would make it run richer? It ran OK and started pretty easy when the weather was cooler, but I haven't really driven it except around the block.

Another data point is that after we shut it off I heard gurgling and hissing in the carbs. I looked in the carb for cyl 1 and there was fluid in there and it was dripping from the linkage pivot on the outside of the carb (back of car). I'm not sure if it was my buddy over zealous with the starter fluid or what, but I figured it shouldn't be dripping out, so maybe I have an air leak there?

My friend that's about 3 hours away set up and installed the carbs and he said he ran stock 2.2 jetting in it. The motor has E pistons and cams on a T 2.2 block and heads.

I embedded a link to video of the carb. Only the number 1 cyl was doing this. None of the other's had fluid standing in them or looked to be leaking.
http://vid592.photobucket.com/albums/tt7/TommyV9/White%201971%20911%20T%20Coupe%20Roller/0DCFBD4A-8689-411F-BB4B-72713257AAC8_zpss2hdpiss.mp4

Then I went home at lunch (after getting it to start last night) today and it started up pretty easily, but is popping and backfiring a lot more than it every has. I'll try to figure out exactly what "stock jetting" is and post it here.

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1971 Light Ivory 911T - Gretchen - sold

Looking for Engine # 6114097

2010 Cayman
Old 06-26-2015, 11:55 AM
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