I'm having a bit of an issue tuning my Holley to get a good idle with smooth transition from off the gas to on, the pedal is more like a switch either on or off! which doesn't make it much fun around town, trying to trickle along it feels rich but on the gas it pulls like a train. Could it be the float level?
Having to take off the air cleaner to access the idle mixture screws possibly doesn't help or wouldn't it make much difference at idle?
I've got a rebuild kit for the carb but work keeps getting in the way to tinker and weekends I just want to get in and drive it!
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
Does it have a "bog", or hesitation when you first give it gas to accelerate? If so, I would first look at the accelerator pump and cam for proper operation/calibration. Check your ignition timing also. From there I would have to say the thing needs to be cleaned/rebuilt.
____________________________________ Joel Adams C3VR Lifetime Member #56 My Link
Not so much a bog but if I press gently on the pedal nothing happens at first then the power comes on in a rush making it very difficult to drive slowly like when in traffic around town. I'm doing a parade today in a local carnival so that should be fun (not!) but I promised so I can't let them down! Thanks Graham PS Its a List 6619-1 Holley which I believe is an emmissions carb from the 70's whatever that means!
Not really sure of the difference, it's on a performer inlet, any way my last tweaking a seem to have been more successful as she behaved very well yesterday in the carnival procession covering a few miles at a snails pace with a celebrity guest in the car with me, pulled steadily at 500-750 rpm even up hill and idled happily when stopped.
I had an issue recently when checking timing with my dial back timing light which showed the timing badly retarded but after stripping off the pulleys to check the damper all seemed to be in order so my timing light must have been playing tricks on me!
I will rebuild the carb as its weeping a bit of fuel from a couple of places, nothing too serious but needs doing.
Thanks for your help
Spent yesterday rebuilding my Holley, the diaphragm was porous on the accelerator pump which explained the weeping leak, everything else looked OK, quite clean inside which I was a little surprised about so the filter must be doing its job!
Just got to fit it back in place, set the float levels and see how it performs, the jets etc. were all standard to original for that carb, the only thing I did find was that the secondary float level was set low so hope the float is OK.
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