Adjusting Quadrajet, Dualjet FAST IDLE

[@that_thing_I_do]

I live vicariously through your Vette diary.

[@chrisguerra355]

Easy to see great camera work

[@76vette]

Thank you for watching! 😊👍🏻

[@juanantonioguerreroserrano1500]

Thanks from Spain

[@76vette]

Thank you for watching! 😊👍🏻

[@MM-fq3ys]

The ending was so appropriate to my experience. I hardly drive mine and as a result, I live to fix one thing, drive it, and then something else breaks; very frustrating!

[@musclecarmitch908]

Great tutorial!👍

[@76vette]

Thank you, Mitch! 😊👍🏻

[@billydee8051]

Hey, 76 vette. Great video with superb camera work. Shouldn't the Fast Idle step down to Curb Idle automatically when the choke is fully opened (@ 90 degree position)? Mine seems to work perfectly but you have to tap the throttle to get it to step down to the Curb Idle. Thanx and keep 'em coming.

[@76vette]

The fast idle is mechanical. 😊👍🏻

[@lindsey4416]

😂😂 I remember mum's Z28 doing that! She pulled into a petrol station to get petrol, great clouds of steam billowed out the front wheel arches & vents!!! Breakdown came out, sorted the hose so we could get to a garage. Got to the garage, parked him up, told them the problem, went back outside, green water in a lake under the front trickling down a drain. Anti freeze!!! The neck of the radiator split🙄🤣🤣. Being in Britain in the 80's, it was rather hard to get basic parts like exhausts etc, nevermind a massive radiator. So, he was patched up with good old Radweld until one could be found!!!!! You can't beat a Chevy for a quirky, & expensive, sense of humour!!!

[@76vette]

Gotta hand it to enthusiasts who own American cars in Europe and other countries. In the U.S. we take replacement parts for granted. Just go to one of the local auto part stores to get one or order online for (usually) next day delivery. Outside of the U.S. (and most-likely Canada), most of these parts qualify as unobtanium, and I’ve also heard about absurd shipping charges plus high custom’s fees, to add insult to injury. I sure hope it’s worth it. Lol 🤦🏻‍♂️😆👍🏻

[@skwermotors]

at 4:18 how the choke plate is opening. It was close then open without touching gaz pedal? Thank you

[@76vette]

Yes, that’s the recommended calibration so some air will mix with the gas as soon as the engine fires. And that’s just a partially opened choke plate. Remember that the ideal air-to-fuel ratio is 14.7 grams of air for 1 gram of fuel.

[@skwermotors]

@@76vette thanks but how the plate goes to close at partially open in split seconde? i don't understand that.

[@76vette]

@ There’s a small vacuum-operated valve called the choke pull-off that takes care of that. Without air, the engine would flood and it would not run.

[@skwermotors]

@@76vette i understand now. I've got an Edelbrock, there's no vacuum on my choke. I'll keep trying to figure it out. Thanks for the video!

[@76vette]

@@skwermotors You’re welcome. Thank you for watching! 😊👍🏻

[@inell6]

What is your rpm’s at first start up on a cold engine? Thanks

[@76vette]

Gosh, haven’t driven the 81 in weeks, but I think it’s around 1800 rpm on a cold engine, then down to about 1200 and 800 when at operating temp.

[@anthonycammaroto7013]

Not a carb guy … my 75 fast idle is about 1600 rpm’s per emission stick from factory . I think it’s a little high .. can I just turn the fast idle screw down or do I have to adjust fast idle cam as well thanks .. sorry about ur rad hose 😩

[@76vette]

1600 rpm sounds about right. And the moment you hit the gas pedal it should go down to anywhere between 1000 and 1200. Once temp gets high enough it should transition to curb idle when you hit the gas again. And yes, you can adjust the fast idle speed by turning the screw in small increments. 😊👍🏻

[@anthonycammaroto7013]

Thanks lou appreciate ya