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Rough idle |
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Markb73gtorino 
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Joined: 23-September-2018 Location: Corpus Christi Status: Offline Points: 78 |
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 Topic: Rough idlePosted: 07-October-2019 at 11:27PM |
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Hello all,
My 73 Torino with a 351C is idling great in park but rough in gear. I replaced the EGR with a 1 inch spacer under the 2bl. No signs of a vacuum leak there but I suspect there is one due to the rough idle. Any advice would be great. Mark
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aquartlow
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Joined: 19-December-2011 Location: Summerfield, Fl Status: Offline Points: 2271 |
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Posted: 08-October-2019 at 6:34AM |
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May want to try opening the idle mixture screws about an 1/8-1/4 turn for a slightly richer mixture. If you have a vacuum gauge, once the engine is up to operating temp, adjust the idle mixture screws evenly for highest manifold vacuum reading(usually has a higher idle RPM as well) then open them about an 1/8 turn more. This setting "should" get you real close. What is your ignition's initial timing set at?
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www.supermotors.net/22468
Yeah, It's a Hybrid...It burns gas and tires. No matter how good she looks, somebody, somewhere, is tired of her sh*t. Beauty is skin deep, ugliness goes clear to the bone. |
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Markb73gtorino
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Joined: 23-September-2018 Location: Corpus Christi Status: Offline Points: 78 |
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Posted: 08-October-2019 at 7:04AM |
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the balancer is hard to read but around 11 past TDC, I will try what you are suggesting. Which vacuum connection should I attach my vacuum gauge too? Not sure, I am getting better at car knowledge but I am still a Grammer school level student
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aquartlow
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Joined: 19-December-2011 Location: Summerfield, Fl Status: Offline Points: 2271 |
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Posted: 08-October-2019 at 8:05AM |
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Just about any vacuum port below the carburetor's throttle blades would be a good source, I would look for one near/under the carb that would allow all cylinders to contribute as compared to using a vacuum source that ties into only one cylinder port. In reality there wouldn't be a huge difference between either source(combined versus single port), just something I choose to do when needing a confident vacuum reading.
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www.supermotors.net/22468
Yeah, It's a Hybrid...It burns gas and tires. No matter how good she looks, somebody, somewhere, is tired of her sh*t. Beauty is skin deep, ugliness goes clear to the bone. |
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Markb73gtorino
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Joined: 23-September-2018 Location: Corpus Christi Status: Offline Points: 78 |
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Posted: 08-October-2019 at 10:24AM |
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thanks for the guidance. Ibwill ker you know how it works out.
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californiajohnny
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Joined: 05-October-2013 Location: winlock, wa Status: Offline Points: 14608 |
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Posted: 08-October-2019 at 3:38PM |
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double check all areas and hoses for a vacuum leak, also check your PCV for a leak? if all checks good then you may need a little more adjusting on the carb and maybe some timing advance too???
unless you have a pretty big cam in it, then...... |
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JOHN
74 GRAN TORINO S&H CLONE 74 VETTE CUSTOM 90 S10 BLAZER 4X4 LIFTED 77 CELICA CUSTOM 75 V8 MONZA SUPERCHARGED 79 COURIER VERT. SLAMMED 75 VEGA V6 5 SPD 70 CHEV C10 P/U 68 MUSTANG FB CONVERSION |
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