So i just bought this beautiful lark. I payed $3,000 for It. I'm about to turn 17 and this is basically my first car. The car is almost all original excluding the wheels and the interior has been redone. It has 79,000 original miles on it. Under the hood is a 350 with a 2bbl carb I believe to be a Rochester? Or whatever comes stock on them. The car runs good but It needs a good tune up. First thing is the car will bog when given to much gas to quick. I'm pretty sure its because of a lack of air. I also checked the spark plugs and they were pretty black which I'm pretty sure is a sign its running to rich? It seems to idle perfectly normal and when sitting if you give it gas it doesn't really bog. I need to figure out how to solve this problem so I can start driving her. Would It just be easier to buy a new holley 2bbl carb for about a $150? I plan on doing an oil change, new plugs, belts, hoses, etc... Please leave me your thoughts on how to solve this problem and any other things i should consider doing to her before hitting the road.
Base plate may be part of the carb kit, ask the parts guy,,,
Well you asked about timing, the bogg issue could be related to that but hard to say if this is the cure, most boggs are carb/fuel delivery from my perspective but maybe you just think it is a dog lacking power and refer to this as bogg? getting the timing right will improve performance
To get timing right you first need TDC to be verified. This involves setting the balancer/dampner 0 mark to line up to the timing pointer exactly when piston #1 is at top dead center.
You would be best advised to use a piston stop along the way which is the only specialty tool needed to do this first part. You can make one with an old plug and a bolt & nut
Seach the crankshaft coalition data base, i dont have the link to the TDC proceedure right now.
Got a timing light and a vacuum gage? these are needed
My method would involve finding out were you are at first as far as base timing at idle, mechanical advance through an RPM range from idle to 3500 rpm and vacuum advance if so equiped, these are the three common aspects of setting up the timing. Before you really dig in a clean fully functional distributor is a good place to start, if the thing is worn out then your wasting time and effort, if it is all dirty then it wont perform either.
Read up on the TDC verification, there are many threads as well that detail timing methods. See what you think of doing the TDC portion and let us know.
Theres no way Its a dog lacking power issue. There is something wrong. Would It be a good idea for me to maybe just replace the timing chain and do all the timing then? And maybe look into an HEI to put on once i did all that.
back up..
your bog.. can be from simple stuff.. from float level being wrong. to the vac. advance can being junk or stuck from lack of use..
start with the basics.. the carb adjusted wrong could be all thats needed to fix your problems..
get a motors manual for your years and start with basic tune up stuff first
I don't see that we've determined it's actual bog rather thn a simple hesitation upon tip-in. A bog is s serious dead spot where the motor refuses to accelerate when the throttle is opened and the vehicle actually slows. A hsitation, however, is a quick blip that cures itself in a second and shows no symptoms again until the throttle is taken from idle to open. I think we should learn more about the symptom before throwing out a million cures for what we have yet to determine.
Ok so let me try and explain a little bit better what happens. When you push down the accelerator If you push It down a tad to much It bogs down and seems like the motors about to die. The car slows down a lot! You have to let off and slowly push It down to keep going. It seems to do It no matter what speed your going.
Are you able to cruise at hiway speeds okay, but not accelerate? Can you reach hiway speed easily if you don't give it too much throttle, or does it not want to really go that fast?
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