Series 1 2000TC Tuning nightmare.

Cam2002

Cam2002

New Member
Hello all. I have been having such difficulty getting the car to idle correctly and to drive nice at the same time.

Set the dwell angle to 60° which is bang in the middle of the factory specified 57°- 63° then I set up the timing to 8° btdc (with the vacuum advance disconnected ofcourse) then went about tuning the carbs. Set the idle to what sounds like 750rpm but reads 1500 on the gauge (voltage stabiliser issue I'm thinking... although the temp and fuel gauges aren't erratic at all). I then set the slack in the lost motion link to .008" as per the manual and backed the mixture screws right off until just touching the pad then turned them in 3 & 1/2 turns each as per the manual then I used a hose pipe to my ear to balance the carbs and then fine tuned the mox from there then double checked the timing once I was happy with the carbs, made some minor adjustments to the timing but the idle would not smooth out it would stay at the rpm for 10 seconds but then it would start idling lumpy and then the revs would slow and it would idle lumpy again. So I increased the idle speed of both carbs a fraction and waited and it seemed okay so I took it a run it was spluttering at every now and then at low rpm and high gentle and hard it didn't seem to matter. And then when I came back 5 minutes later soon as I pulled in the drive I rechecked everything the engine was dancing around the 2 timing marks 8° and the TDC mark were bouncing up and down constantly so rechecked everything adjusted it all from the beginning and it did it again so please has anyone had this same issue ?

Also to note all of this was done after the specified 6 mile drive to warm up the engine thoroughly. Ahh yes plus when you let off the throttle at slower speeds the car buffets quite badly sometimes too. I am totally out of ideas so if anyone has any I'd really appreciate them thanks,
Cameron.
 
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Fluctuating timing can because of a distributor fault, something worn or broken inside, or a worn timing chain .
FYI book timing for a 2000TC is 6 degrees BTDC.
 
AFAIK voltage stabilizer is not relevant to the tacho. It just counts sparks. Agree with Harvey - check all is well inside the dizzy.
 
What @harveyp6 said. I’d also check for air leaks around the carb spindles. If the spindles and spindle bearings are worn you’ll be chasing ghosts forever.

With it idling spray some brake/carb cleaner or starting fluid (whatever you have to hand) at the points where the spindles exit their carb bodies. If you find it affects idle speed (up or down) then you have a vacuum leak around the spindles and will need to address that.
 
harveyp6 said:
Fluctuating timing can because of a distributor fault, something worn or broken inside, or a worn timing chain .
FYI book timing for a 2000TC is 6 degrees BTDC.
Click to expand...
Yes sorry 6° is what I meant I'd been at it for hours and was angry
 
Don't forget the fuel used in the 60s is not the same as what's available today, so you may have to adjust settings until the engine is happy. The book settings are a start, remember the engine can't read. ;)
 
^ what he said. I’ve found a little richer on fuel and a little more advance on E5 fuel. But yours might vary.
 
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