I tried to find a previous post, but I couldn’t find an exact match. Hope its OK to start a new thread.
My 1964 3.8 OTS has been running a little weird lately. I’ve had the car for a couple months and I’ve put about 1500 miles on it without any problems. It’s getting to be a nice September weather here in VA, but nothing cold yet. But for the last few drives (usually I go out about 50 miles) it eventually starts after much prodding, i turn the choke off after about 5 minutes and it runs lumpy and rough (with the occasional “carb-backfire” and once warm it then runs absolutely great on the highway, but “lumpy” at slower speeds (engine lumpiness) and seemingly great on sweeping backroads. But after 40 minutes or so, I inevitably come to a stoplight and as soon as the RPM comes down it has died several times like this.
Today it quit once after 45 minutes the first instance where it returned to idle and I was able to restart, then 5 minutes later it quit again and it REALLY wouldn’t restart. I was still moving and I also tried popping the clutch in 2nd gear as I was rolling over to the shoulder with no luck.
I was stranded for 30 minutes with a very helpful MG owner offering advice and an even more-helpful police officer making sure we didn’t get hit. Plus a buddy of mine on the phone offering suggestions. There was plenty of fuel in the post-filter line, but we noticed all three dashpots were low on oil.
The way I “fixed it” was to just give it 30 minutes at which point it fired right up. I drove 10 minutes to the nearest NAPA with police escort and turned the car off whilst inside looking for a suitable dashpot oil. After 30 minutes, I restarted just fine and drove 30 minutes home. No problems whatsoever…
I haven’t looked at the plugs lately, the car has electronic ignition, a non-OEM fuel pump which I can hear working, there seems to be a small fuel leak (now for the first time) right at the glass fuel filter, slow dripping. There is also a strong fuel smell from back near the boot. The fuel filter element seems OK.
Sunday afternoon my big plan is to check the plugs for signs of rich/lean problems, perhaps regap and.or replace them, fill the dashpots, check the carb synch with my Unisyn tool, use my Joe Curto carb tools to check the idle piston movement and other maladies, see if anything is obviously out of whack on the carb adjustment, check the floats and the “needle and seat” (I think that’s what that’s called) in the float bowls, and figure out what the heck is going on with the fuel smell and the newly discovered dripping gas leak at the glass fuel filter.
Anything else I should look into for my initial investigation? I’m no expert, but I rebuilt my dual Strombergs in my TR250 using one of Joe’s kits and I think I have a general idea of how the SU’s work.