Question about 1992 Buick LeSabre

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I have 73 MGB that hesitates on acceleration after its warmed up

I had the distributor and carburetors rebuilt, what else could be the problem

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Hello, Ok this can be several things but they do not have to be difficult. I would change your spark plugs and wires. I would change your fuel, oil, air, filters. I would check your EGR vavle and systems. This could possibly as well be a slipping clutch in your transmission is this between shifts or no? I would check your vaccum lines and hoses and also your throttle body. I would pretty much assume one of your vaccum lines on your careburator has a small pin hole in it or is connected wrong. I hope this helps you!

Posted on May 20, 2009

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I believe this year had a temprature compensator on the side of each carb, these can cause hesatation, also all these carbs, and stromberg cv carbs benefit in being set a little rich at tickover. Finally what oil are you using in the damper? the oil needs to be quite thin (sadly this tends to leak out quickly, top up often)

Posted on Nov 12, 2009

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Hello,
First, you need to check fuel delivery and spark, or spark and fuel integrity. You can check spark by running the car with one wire off at a time and listen for running change,or lack thereof, if you see no change upon pulling a particular wire, possibly that is the faulty ignition lead or bad spark plug. you can also run the car at night and look for high tension leaks on the wires and distributor cap in the dark--- they show up very well. If your ignition seems to be o.k. then look at fuel delivery. Pull the supply line off the carbs and have someone turn the key on and watch for steady flow. Then repeat the test with the tube immersed in the can and look for bubbles in the fuel; if there are bubbles then there is a leak in the fuel supply line somewhere from the pump to the carbs which you must remedy. If it is neither of these, then look at yo. ur fuel filter and possibly change it---put on the clear type, not the steel canister style that you cannot visually check.  also consider looking at spraying some carb cleaner through the throats of the carbs to clean the workings. But don't go buying things willy nilly until you perform some simple checks. If the car has points (still) then check the condition of the contacts, the rotor, and also the condenser, sometimes condensers fail, and everything else can be fine.  Many engine malfunction checks like this are in your Haynes manual.   Matt J

Posted on Oct 11, 2009

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Hesitation or stumble during acceleration


take your car for a tune up
if they are carburetor type motors you may need your carbie cleaned and a tune up
if you clean it your self with carbie cleaner it may increase in idle speed this is nothing to worries about it is a simple adjustment
with a carburetor type motor they tend to idle higher when their cold this is the automatic choke kicking in and normally it should happen till the car is a bit warmer and the accelerator has been depresses
although a car should idle at 800 rpm my paddok car dose when it is cold it idles at 1200rpm i like it this way as the car warms up quicker as i will not drive a car while it is cold
hope this helps
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