69 350 Running rough in gear - Chevelle Tech
Troubleshooting Diagnosing problems done here.

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post #1 of 13 (permalink) Old May 30th, 19, 8:36 PM Thread Starter
Daniel
 
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Location: Klamath Falls, OR
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69 350 Running rough in gear

So I have 69 Malibu 350 2 Barrel that Iím
Having issues with. It runs just fine in park but when I put it into gear it runs terrible and dies sometimes. Iíve had to turn the idle up to keep it from dying immediately in gear.

It has new wires and plugs, rotor and cap though itís been a few years since they were actually installed (the car is never driven). The fuel filter is new and the carburetor is also a new.

When in park the vacuum pressure reads just fine but drops in gear.

I am still fairly new to older engines and I have exhausted all of my knowledge. Anyone know whatís going on or what to try?

I have a video but it wonít t let me upload it for some reason

1969 Chevelle Malibu, Frost Green, Dark Green Vinyl Top, Green Interior. 255hp 350. Father Was Original Owner.
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post #2 of 13 (permalink) Old May 30th, 19, 8:37 PM Thread Starter
Daniel
 
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69 350 Running rough in gear

Nn

1969 Chevelle Malibu, Frost Green, Dark Green Vinyl Top, Green Interior. 255hp 350. Father Was Original Owner.
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post #3 of 13 (permalink) Old May 30th, 19, 8:47 PM
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Eric
 
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Re: 69 350 Running rough in gear

Does it still have points? Have you gone over your tune settings.

Your just jealous because you can't hear the voices!

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1963 Plymouth Fury 440/Torqueflite
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post #4 of 13 (permalink) Old May 30th, 19, 8:49 PM Thread Starter
Daniel
 
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Re: 69 350 Running rough in gear

Quote:
Originally Posted by oldcutlass View Post
Does it still have points? Have you gone over your tune settings.


Yea it still has points

1969 Chevelle Malibu, Frost Green, Dark Green Vinyl Top, Green Interior. 255hp 350. Father Was Original Owner.
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post #5 of 13 (permalink) Old May 31st, 19, 12:09 AM
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Re: 69 350 Running rough in gear

How old is the gasoline??

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post #6 of 13 (permalink) Old May 31st, 19, 12:15 AM Thread Starter
Daniel
 
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Re: 69 350 Running rough in gear

Quote:
Originally Posted by LeoP View Post
How old is the gasoline??

Itís from October. I know that could be an issue but it was running bad before and itís just getting worse

1969 Chevelle Malibu, Frost Green, Dark Green Vinyl Top, Green Interior. 255hp 350. Father Was Original Owner.
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post #7 of 13 (permalink) Old May 31st, 19, 11:53 PM
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leo
 
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Re: 69 350 Running rough in gear

Gasoline loses about 1 octane point per month after dispensing into a gas tank, try some Sta-Bil in the tank!

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post #8 of 13 (permalink) Old Jun 2nd, 19, 9:54 AM
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Re: 69 350 Running rough in gear

Try plugging the vacuum advance hose into manifold vacuum if it's not already connected to that. (Of course, cap off any hose nipple left unused when doing this.) Also, check carefully for vacuum leaks. Check all hoses, make sure the carburetor baseplate gasket is not leaking, etc. A good way to do this is to spray carburetor cleaner around the base of the carburetor while the engine is running. Try to ensure the spray doesn't get sucked into the air intake snorkel on the air cleaner housing, and see if the engine speed changes when you spray. If it does, you've found a vacuum leak.

'71 chevelle, 468, TH400, 12 bolt posi w/3.08's, drinks a lot of 87 octane.
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post #9 of 13 (permalink) Old Jun 3rd, 19, 1:44 PM
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tom
 
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Re: 69 350 Running rough in gear

it's too late for the Stabil to work. Stabil keeps new gas fresh longer than it's shelf life (60-90 days). It does not make "stale" gas fresh or usable.
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post #10 of 13 (permalink) Old Jun 3rd, 19, 11:54 PM
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leo
 
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Re: 69 350 Running rough in gear

Quote:
Originally Posted by tm66 View Post
it's too late for the Stabil to work. Stabil keeps new gas fresh longer than it's shelf life (60-90 days). It does not make "stale" gas fresh or usable.



I disagree, I was fixing up an S-10 truck for a neighbor with at least two year old gas in it, it would idle ok, but driving is just putted along, poured some Sta-Bil in the tank and took it for a drive and it was fine, your mileage/results may vary!!
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post #11 of 13 (permalink) Old Jun 12th, 19, 1:20 PM Thread Starter
Daniel
 
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Re: 69 350 Running rough in gear

Well after working on the car for days and days and not being able to figure it out, I ended up taking it to a mechanic.

Turns out it was some pretty simple things. The points were bad (did not look like it to me), and the condenser in the distributor was bad. They replaced those and tuned the carb a little bit, timed it and it purrs like a kitten
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1969 Chevelle Malibu, Frost Green, Dark Green Vinyl Top, Green Interior. 255hp 350. Father Was Original Owner.
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post #12 of 13 (permalink) Old Jun 12th, 19, 3:03 PM
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Re: 69 350 Running rough in gear

Quote:
Originally Posted by Diggerdan11 View Post
Well after working on the car for days and days and not being able to figure it out, I ended up taking it to a mechanic.

Turns out it was some pretty simple things. The points were bad (did not look like it to me), and the condenser in the distributor was bad. They replaced those and tuned the carb a little bit, timed it and it purrs like a kitten
In the future you are going to need a tool called a Tach & Dwell meter if you are going to keep using your points distributor.A basic dwell meter will read the dwell reading plus High & Low RPM.
OR you can replace your points with an electronic set that converts your points distributor into an electronic ignition.

https://www.summitracing.com/parts/pnx-91284/overview/
and The Pertronics conversiion comes in three (I - II & III) versions

OR

https://www.summitracing.com/parts/f...1720/overview/
I think the Fast used to be the Crane Electronic conversion kit but I'm not sure about that.The search feature is your friend on this subject.Whatever you choose you will still need a Tach for tune-up purposes.

John
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406 SBC M21 3.31 12 bolt
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post #13 of 13 (permalink) Old Jun 12th, 19, 3:30 PM Thread Starter
Daniel
 
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Re: 69 350 Running rough in gear

Quote:
Originally Posted by 71350SS View Post
In the future you are going to need a tool called a Tach & Dwell meter if you are going to keep using your points distributor.A basic dwell meter will read the dwell reading plus High & Low RPM.

OR you can replace your points with an electronic set that converts your points distributor into an electronic ignition.



https://www.summitracing.com/parts/pnx-91284/overview/

and The Pertronics conversiion comes in three (I - II & III) versions



OR



https://www.summitracing.com/parts/f...1720/overview/

I think the Fast used to be the Crane Electronic conversion kit but I'm not sure about that.The search feature is your friend on this subject.Whatever you choose you will still need a Tach for tune-up purposes.


I do have a Tach and Dwell meter. I have also been researching the Pertronics conversions. I want to keep the Chevelle to as close to original as possible so it look like that might not be a bad option
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1969 Chevelle Malibu, Frost Green, Dark Green Vinyl Top, Green Interior. 255hp 350. Father Was Original Owner.
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