The popping on decel is normal if you have a nice crisp lean idle mixture. Because your decelerating and your off the gas, its running on the idle circuit so there isn't enough fuel at the given speed and load, so you'll get the lean popping/burbling. (sounds awesome with headers)
Thanks, I figured this out after I posted that. Should have followed up on that post too...Anyways, it started to happen more when I turned my screws in to 1.25 turns out from 2.0, and as you said when you lay off the gas your running on the lean mixture of the idle circuit.
Two point conv is that I went to a smog guy that knows his stuff about carbed wheeling rigs. He asked me how I tuned it and before he even put the probes in the exhaust, he turned my idles 1/3 turn in, and then he probed it and it passed smog! He said the vac tuning makes it too "fat" (see! He knows his terminology).
After the test he ran it on diagnose so he could see my numbers in real time, and he said I'm a jet lean on my mains. Good to know.
Then we BS'd about carbs for a sec. He asked me how I like the Holley off camber to which I replied about its painful weaknesses. You'll like this one Matt, he then recommended a Qjet and told me some shocking stories about what he's seen Qjets do offroad.
As if I wasn't sold before, I'm really sold on a qjet now!
As I understand it, the color change on the ground strap is an indication of heat range and timing, with heat range having the greatest effect.
To me, your plugs appear to have the correct heat range, your mixture looks good, and you could use slightly more timing.
Do you really think fuel was flowing thru the vent, causing flooding, on an incline? I'll be interested to see if your extension fixes that problem.
Hey guys, it's been a while for this thread, but...
there wasn't an issue with fuel coming out of my float bowl vent after all. Remember that crazy fuel tube contraption thing I made? I'll repost the pic soon. My lean back stumble is something else. Probably a lack of a Qjet
Not sure about Steve's tune, but I've been happily married for just over a year now!
As a random update, since I'm here, the best tuning things I've done for the jeep:
1. Ditched the summit dizzy for a DUI dizzy
2. Ditched the Holley for a Motorcraft 2150 from an AMC 360
Thanks! I was wondering if stock carb was the way to go on my 360. I don't know if the Edelbrock intake would accept a 2150. I am having a hard time getting the Edelbrock Performer 1400 to run right. I took it apart yesterday and I am thinking I need a new carb or different carb. I am not very car carb experienced.
The DUI dizzy removes the coil and motorcraft box from the system?
The Edelbrock intake is a standard square bore bolt pattern. The 2150 is a Holley bolt pattern. You would need an adapter.
Is your 1400 relatively new? What problems are you having with it? FWIW, I've been happy with my Q-jet on my 360 with a Eddy intake.
Not new. It is a 1400 which seems to have been built over 20 yrs ago.
Problems: Rough idle, hesitation during acceleration, not sure if electric choke is working, main jet on one side. But so many I am not wanting to fix it. It takes a lot of time to troubleshoot all these and I would like to drive soon and not be in the shop all this fall. I still need to re-route my fuel line from fuel pump.
In all I have many issues and no manual to work from. I have a vacuum switch on the intake with a brown wire going somewhere, I have vacuum switches with no lines, I had a vacuum line taped up. Being trying to fix all these just a little overwhelming at times. I am not usually a parts changer. I don't mind troubleshooting. But it builds up and I get a lot from this forum but still some questions are unanswered.