Rochester QJet

[Shorty40]

Hey guys and gals

I have a prob with the carby now that the weather is cooling off abit.

My engine runs really cool (temperature wise ) Temp gauge barely moves over 1/3 and it seems the engine is not getting hot enough to cut out the choke It bogs down on intial throttle, stutters abit then clears its throat and then its fine. It does this whether the engine is just startde or after 3 hours of wheeling

Now here is my conundrum, I don't have a choke on the carb

Actually is has the heated choke but it has been disconnected. I was going to get an electric choke but never got around to it.

History - Rochester QJet and edelbrock performer manifold on a 253 Red pre-pollution V8.

Would it be temp/choke or something else ?

[-Mick-]

Quadrajet is a biggish carb for a 253, I used to have the same setup and it bogged down badly under acceleration

Doesn't help you though

[Shorty40]

Only started doing it in the last month or so Was working well before that.

Does it in all gears around 1500-1800 rpm.

It was a complete new carb about a year and a bit ago.

[planb]

dan

ive emailed you some shiat re; qjet tuning

let me know if theres any dramas

[Shorty40]

Thanks Rhys

[-Scott-]

Not an off-road application, but I have a similar problem with a twin-carb setup on a 2.6 Sigma. I believe it's flooding from too much accelerator pump, the carby guy who was tuning it doesn't agree, and I've already got smaller pump jets/less pump volume than was recommended for the combination I've got.

I was about to reduce the pump volume again, but if anybody has a different suggestion I'd love to hear it.

Thanks,

Scott