Triple Black 73
Well-Known Member
Last night I drove from north Alabama to Atlanta, about 120 miles. The trip started out well enough. I did the normal stop for gas and a drink before hitting the road. The first sign of trouble was just after leaving town with a big backfire and partial cut out going up a big hill. Then lot more backfire. And bucking. Then whole lot of back fire and a lot more bucking. It was bad, real bad.
I almost called for a towed truck at 1:30 am just 30 miles from home, but I pushed on because I had good compression, plenty of oil pressure, and the water temp looked good. I manage to get home in the last 30 miles by driving it a bit, letting it cool, then driving it every 8 miles or so.
This morning? Well, I went out to cranked the 'ol girl up to move her into the garage and she was like "Rough night, eh? Everything fine now." Like nothing happen. WTH?
I noticed the following:
I almost called for a towed truck at 1:30 am just 30 miles from home, but I pushed on because I had good compression, plenty of oil pressure, and the water temp looked good. I manage to get home in the last 30 miles by driving it a bit, letting it cool, then driving it every 8 miles or so.
This morning? Well, I went out to cranked the 'ol girl up to move her into the garage and she was like "Rough night, eh? Everything fine now." Like nothing happen. WTH?
I noticed the following:
- The ignition coil was very hot
- Coil measured 1.9 ohms on primary side, 10.9 kilo ohms on secondary, which is within spec for this stock style replacement coil.
- Ran good at 55 mph / 1600-1800 rpm. Anything else was backfire city.
- It would run fine for a little bit, then started acting up, then would run ok again.
- Higher RPM made it run better when it acted up.
- I pull off when it got real bad.
- No engine noise beside the EFI injectors.
- Volts were 12.7 at idle, 13.2 when going down the round.
- The ballast resistor went bad before upgrading the carb to EFI
- The car has progressively gotten worst over the last year or so