Nickgb55
Recruit
- Joined
- Jul 9, 2020
- Messages
- 2
I have a 1985 Supra sunsport with. 3.5l Ford Windsor.
My current issue is that the boat will not get to above 3k RPMs and has a top end speed of about 20 mph with no one on board. With these low RPMs, the secondaries in the Holly carb are not opening. The engine idles fine but under load opening the throttle it backfires and you can hear the engine start to miss. After that point these is no more power to be had.
Here is what I have completed so far;
Plugs/wires (old plugs where badly carbon fouled)
New coil
Checked timing
Gapped points
New ignition coil
Carb was put in new last year from previous owner (he was having the same issue with low top end power)
Checked throttle cable/linkage at carb assembly
Have been all over the forums, keep thinking I got the problem kicked but still no improvement.
What y'all think?
My current issue is that the boat will not get to above 3k RPMs and has a top end speed of about 20 mph with no one on board. With these low RPMs, the secondaries in the Holly carb are not opening. The engine idles fine but under load opening the throttle it backfires and you can hear the engine start to miss. After that point these is no more power to be had.
Here is what I have completed so far;
Plugs/wires (old plugs where badly carbon fouled)
New coil
Checked timing
Gapped points
New ignition coil
Carb was put in new last year from previous owner (he was having the same issue with low top end power)
Checked throttle cable/linkage at carb assembly
Have been all over the forums, keep thinking I got the problem kicked but still no improvement.
What y'all think?