JVY
Active Member
Does anyone have a good proven guide on how to setup carbs on a 2200TC please?
Each year since I got my car, I have managed to balance my carb's and set the mixture OK using x2 Gunsons Colourtune plugs and a carb balancer.
Though my car was off the road for a year, every week I started her up and thoroughly warmed the engine and let it idle for about 20 minutes. Each time, she started OK and idled nice and smoothly at 600-700rpm. When I got back on the road I noticed two things:-
1. After driving only a few miles, the engine hesitated or stuttered under harder acceleration at about 3000-4000rpm. This happened 2 or 3 times going uphill and then went away. I have since clocked up about 200 miles and the problem has gone away - engine feels powerful and accelerates just fine.
2. Slowly but surely over last 200 miles, the engine at idle has become very erratic. Going by my rev counter, the rev's go between 500-750rpm and sometimes the engine stalls. As this has got worse, I started to notice that the engine is running less smoothly while driving at 1000-2000rpm.
I put problem 1 down to maybe stale fuel or muck in the tank or fuel lines as the car had been sitting for about a year.
With problem 2, I thought the car just needed her annual ignition points check/set, timing check/set and carb check/set. However, after 3-4 hours spent going over these checks, I cannot get the car to idle properly at anything below about 1200rpm!
One thing I did notice is that the problem might be with the front (cyl 1 & 2) carb when idling. With the colourtune plugs in cyl 2 & 3, I can see that cyl 3 has healthy looking constant combustion. However, looking at cyl 2, I can see that combustion is erratic. It looks like I maybe get a few good cycles with healthy mixture, then little or no combustion for a few cycles, then ignition comes back but is very rich for a few cycles. It then goes back to healthy and repeats this cycle. No matter how much I adjust the idle mixture or idle speed on the front carb it just won’t run properly like the rear one. As soon as I apply a bit of accelerator and both carb pistons lift a little, they both run fine (i.e. healthy mixture and combustion). When I return to idle, the pistons drop, idle is OK for several seconds, then the erratic front carb thing starts up again. If I set the idle speed at about 1200rpm or above the problem goes away.
I haven’t ruled out things like the fuel pump (air bubble in glass bowl of my mechanical pumps looks suspiciously large and close to the filter at idle and seems to fill up a bit with increased rev’s)? Also, perhaps, an air leak on inlet manifold for front carb? Could even be an ignition problem. I still also need to check valve clearances (though they were fine a few hundred miles ago).
Given that it only seems too affect cyl 1 & 2 and the problem only starts several seconds after return to idle, I keep thinking it is a fuel or carb problem. Or, maybe I am just not setting the carbs properly – hence the request for a good HIF6 setup guide. Of course, any thoughts or suggestions most welcome please.
Each year since I got my car, I have managed to balance my carb's and set the mixture OK using x2 Gunsons Colourtune plugs and a carb balancer.
Though my car was off the road for a year, every week I started her up and thoroughly warmed the engine and let it idle for about 20 minutes. Each time, she started OK and idled nice and smoothly at 600-700rpm. When I got back on the road I noticed two things:-
1. After driving only a few miles, the engine hesitated or stuttered under harder acceleration at about 3000-4000rpm. This happened 2 or 3 times going uphill and then went away. I have since clocked up about 200 miles and the problem has gone away - engine feels powerful and accelerates just fine.
2. Slowly but surely over last 200 miles, the engine at idle has become very erratic. Going by my rev counter, the rev's go between 500-750rpm and sometimes the engine stalls. As this has got worse, I started to notice that the engine is running less smoothly while driving at 1000-2000rpm.
I put problem 1 down to maybe stale fuel or muck in the tank or fuel lines as the car had been sitting for about a year.
With problem 2, I thought the car just needed her annual ignition points check/set, timing check/set and carb check/set. However, after 3-4 hours spent going over these checks, I cannot get the car to idle properly at anything below about 1200rpm!
One thing I did notice is that the problem might be with the front (cyl 1 & 2) carb when idling. With the colourtune plugs in cyl 2 & 3, I can see that cyl 3 has healthy looking constant combustion. However, looking at cyl 2, I can see that combustion is erratic. It looks like I maybe get a few good cycles with healthy mixture, then little or no combustion for a few cycles, then ignition comes back but is very rich for a few cycles. It then goes back to healthy and repeats this cycle. No matter how much I adjust the idle mixture or idle speed on the front carb it just won’t run properly like the rear one. As soon as I apply a bit of accelerator and both carb pistons lift a little, they both run fine (i.e. healthy mixture and combustion). When I return to idle, the pistons drop, idle is OK for several seconds, then the erratic front carb thing starts up again. If I set the idle speed at about 1200rpm or above the problem goes away.
I haven’t ruled out things like the fuel pump (air bubble in glass bowl of my mechanical pumps looks suspiciously large and close to the filter at idle and seems to fill up a bit with increased rev’s)? Also, perhaps, an air leak on inlet manifold for front carb? Could even be an ignition problem. I still also need to check valve clearances (though they were fine a few hundred miles ago).
Given that it only seems too affect cyl 1 & 2 and the problem only starts several seconds after return to idle, I keep thinking it is a fuel or carb problem. Or, maybe I am just not setting the carbs properly – hence the request for a good HIF6 setup guide. Of course, any thoughts or suggestions most welcome please.
