Well i have a 55 ford crown victoria with a 292 Y-block the car runs fine...but lately i have been having a werid idling problem the car starts up fine runs beautiful but after it warms up the car idle's like it has a lopey cam...It will idle normal then idle choppy then normal then choppy..if i give it gas it runs great i take it out shift through the 3 gears awesome come down to and idle normal for a few minutes then choppy again what the hell can this be???????? I checked the normal stuff Vac leaks none , carb was just rebuilt it is a holley 2bbl ...so any ideas on what this can be.....the cap is new rotor is new plugs are new wires are older and points,cond,coil are also older.....too
What kind of Holley 2 barrel? Are you talking about an Autolite 2100? Rebuilt doesn't mean it is faultless. Kinda sounds like its "loading" up with fuel or something. Was this a case of just bolting it on or did you adjust it? Just trying to get a clearer picture of what you've already tried.
The carb is a 97 2bbl it was rebuilt and adjusted perfectly the car starts and drives fine just idles werid...almost like a new car when the thorttle postion sensor or EGR valve is acting crazy...its surging the only words i can think of....idle goes up then down ,up,down up,down......lol well trying to give you a good description....
head scratcher.... Possible lean condition somehow after it heats up causing a surging idle? That might lead back to a vacuum leak again though. Just some thoughts. Perhaps as something heats up, a vacuum leak appears? I dunno
Im confused to maybe it a float issue or a needle and seat ***y problem in stumped...Like i said it runs fine just idles up and down up and down....
I've got almost the same problem on my 62 caddy, interested to see what ideas you guys might have. I was just attributing it to an older worn engine but couldn't think of what it was because it's not consistant. I'm running a out of the box edelbrock 750cfm carb with elec. choke bryan
im thinkin float issue, possible pinhole crease lettin fuel in... will drive ok but not for long... you been on long trip since this problem? iwent down this road in my plymouth... gas gets hot, metal expands, crack lets in fuel, float no workie...
What do you call a long trip i drove it the other day on the highway for about 20 minutes around town for another 10-15 minutes today i ran it for 20 minutes on and off ....so yes i do drive it Just seems to have an idle issue ..i have never changed my points or condensor ,the coil is old ....never checked dwell so could it be an ignition problem weak spark???? I got this car last yr it was sitting for 10 yrs i mean not on the road for that long it was yard driven..It has a new gas tank,new fuel line,fule filter,plugs,cap,rotor...I didnt do the other stuff because im putting in the protronix with a new coil and wires soon...This does have a vac style fuel pump too...could that have anything to do with it.....
I don't know but I'm thinking carb. Could be float or maybe the choke is sticking.Check those out but updating the ignition system sure can't hurt!! Could even be to large a jet in the carb. causing it to load up. Good luck
if u did all taht just replace points, condensor, coil, that **** is CHEAP... i would spend $20 and do that, and tehn check out the fuel pump (although i doubt its the trouble)... drop the $20, spend a 1/2 hour and try that, gotta do it eventually anyways... youre drivin it toooo far for it to be a float issue, unless its just stuck..
I'd say fuel issue. My 292 sometimes gets the lopey cam idle when I fire it up after it's been sitting a while (days, not hours). It'll do that while it's cold, and sometimes die if I don't give it some gas. Did it do this before you rebuilt the carb? If not, the only thing changed was the carb, and I'd focus on that. See what happens when you fix stuff!!
No it didnt do this before the rebuild the rebuild was about 5 months ago the car ran great ...now it seems to be doing after the winter sit...I had filled the tank and put in the stabilzer stuff and started it once a month in the winter...ran good every time now i took it out started using it because the weather is nice and now this.............
This may have nothing to do with it, but is all the stabilizer **** gone? I have never used any type of stabilizer, even when I lived in Nebraska, and I've never had any problems. My buddy uses stabilizer in all of his stuff. Lawn mowers, chain saw, pressure washer, motorcycle, etc. And every year when he pulls them out to use them, they have all kinds of problems. Usually I'd have to go throught the carb/fuel intake for him to figure out what is wrong. Most of the time there was some type of blockage in the jets, and every time I've had to tear apart his carb and clean it out for him to get stuff to run right. I finally convinved him to stop using it, and the problems stopped. I'd check the carb, make sure it's clean and there's nothing blocking any of the jets causing it to go lean. Check for any type of build up/debri/shellac that may be coming off and causing the problem.
When the idle is lopey is there a set pattern up and down or is it random up and down. Y-blocks don't oil so well on the upper end. Oil pressure is less at idle and higher when cold. Maybe a valve is sticking. Good luck, 54chop
Well i guess its kinda the same type of up and down and it just started this if it was a stuck valve wouldnt it has a miss or a stumble and if it is a stuck valve how can i free it.......
I had to think that over it isnt random it does it when it feels like it not always the same time it might run fine for a few minutes then it does it...Also when it first did this i thought i was running out of gas that what it felt like when i turned the corner it kinda went to a low idle like it was getting ready to stall then it picked up and had a little faster idle then what it was sent at then leveled out then did it a few minutes later idled down then up.......could this be a valve?????
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