Any Weber guys here?

[craig3x]

Originally Posted by FerociousP

Are you worried about the O2 sensors failing when one isn't being used (up to temperature)? or are they working and you are just not reading one of the outputs?

It's just annoying cuz I can only read 1 output at a time. I have to flick the switch to read the other one. This makes it hard to tune and read while driving

[craig3x]

Originally Posted by 730RWHP12A

what is the acc. bypass jet in the bottom of the float? it has to be a zero

Originally Posted by craig3x

I am having a similar problem. Choppy at cruising speeds. But on a long deceleration, it seems to "build up" or something, cuz when I get back on the throttle, it bogs and then farts a huge backfire out the exhaust and sometimes dies. Most of the time I have to pull over and wait a few minutes then fire back up. I do have a wideband, but it is digital and not sure how accurate. (question, i had to install a switch on my wideband guage to go back and forth from each rotor because I am using 2 0xy sensors. has anyone solved that problem?)
here are my jetting settings:
Weber 48 IDA on a 13b street port. (4 port)
250 MAIN ( I know this is big, but my problem is at lower RPMs. Ordered a 190 and 220)
70 Idle
50 Pump Jet
F-11 emulsion tubes
160 Air Corrector Jet

Please help if you can! Thanks

Ok, so I got some new jets. I just swapped in a 60 idle and 220 mains. And now my problem seems worse. And my wideband is reading richer than before at idle. The choppyness is worse too. How can it be richer with smaller jets? AARRGGHHH!!

[craig3x]

Also, I just measure and found out I have 47mm venturis. Seems huge, but thats what the carb came with on this car. Also, I am not running the airhorns. Is that bad? what do they...and the venturis do exactly. And what is affected by their size??

[craig3x]

also, I have been told to increase my pump jets from 50 to 90, which is only possible by drilling. I'm not gonna do that. But it's funny how so many opinions and advice can contradict others. Either way, I have learned a lot from everyone.
By the way, F#@k RX7club.com and their rules. This forum is 100x better

[PercentSevenC]

42mm venturis sound fine.

What exactly does your wideband do when it bogs? Does it go rich briefly and then go lean, or the opposite, or just lean, or what?

[craig3x]

I actually think my condition is lean. There is a huge "cutout" when gassing it from low rpm to midrange and higher. Plus my wideband is saying lean as well. But I don't know how that's possible with 70 idle jets and 250 mains. wtf???
I have heard about drilling out a 3rd progression hole. But I don't have the ballz to do that...and am unsure if that would solve anything anyway