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DeltaAir423
Jedi Trainee
Offline
Well I was working on the Spit this morning, and it has always idled really rough. In doing some looking, I took the IR thermometer to the exhaust header, and I came away with these readings at 2000 rpm stable.
#1 593 deg F
#2 475 deg F
#3 320 deg F
#4 575 deg F
Granted, I didn't get a chance to pull the plugs before I had to leave for work, but it looks to me that I have a major ignition or A/F problem.
I'll probably get at it tomrrow and change the plugs, wires, cap, and rotor. One thing that I noticed on the carb and intake, my primary throat sits over the portion of the intake that feeds #1 and #4. The secondary sits over the portion that feeds #2 and #3, which doesn't even move till about 70% throttle travel. I can see the fuel spray in the primary, but I can't see any fuel spray in the secondary.
Now if I mash the thottle from idle to WOT quickly, I can hear it lean out, hesitate, backfire, then pick back up. Sometimes, it just dies.
I'm hoping the plugs and wires fix it, but if it doesn't, is the carb shot? I will be picking up a UK spec manifold and SU's from a member here as soon as I pool the extra money together.
ETA: Currently there is a Weber DGV manual choke carb on it right now.
#1 593 deg F
#2 475 deg F
#3 320 deg F
#4 575 deg F
Granted, I didn't get a chance to pull the plugs before I had to leave for work, but it looks to me that I have a major ignition or A/F problem.
I'll probably get at it tomrrow and change the plugs, wires, cap, and rotor. One thing that I noticed on the carb and intake, my primary throat sits over the portion of the intake that feeds #1 and #4. The secondary sits over the portion that feeds #2 and #3, which doesn't even move till about 70% throttle travel. I can see the fuel spray in the primary, but I can't see any fuel spray in the secondary.
Now if I mash the thottle from idle to WOT quickly, I can hear it lean out, hesitate, backfire, then pick back up. Sometimes, it just dies.
I'm hoping the plugs and wires fix it, but if it doesn't, is the carb shot? I will be picking up a UK spec manifold and SU's from a member here as soon as I pool the extra money together.
ETA: Currently there is a Weber DGV manual choke carb on it right now.
