I recently put a new head on my 60, runs great but has a somewhat shacky idle, today I went out and went thru everything- compression is good, retorqued the manifold, and went to re-adjust the valves-they were all fine, did the lean drop on the carb( as best as I could), and went thru the FSM on the emisions systems,( EGR system disconnected too), it's like I said a little shacky and inconsistant-not like the typical vacume leak that has that oscilating rpm change, i'm stumped, it's not real bad but something just doesn't seem rite to me, Just how smooth should it be?
How smooth is your idle? (1 Viewer)
- Thread starter RHON
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John McVicker
SILVER Star
How is your seal on the carb to intake manifold? Same thing on your exaust manifold.
John
John
- Thread starter
- #3
All fresh gaskets , carb & plenum- everything nice and tight, sprayed carb cleaner around wtth no result- I can't nail this one down.
Mine isn't very smooth. I think I have a vac leak somewhere.
mine's smooth as butter---- but then again I just had the engine rebuilt. (balance and blueprinted). Good luck
John McVicker
SILVER Star
It's always a good idea to set your timing when you adjust valves.
John
John
- Thread starter
- #7
Set the timing as well, been thru everything I can think of.
how are the fuel pump and fuel filter looking? how fresh are the ingnition parts and are they OEM?
Mine is smooth with a SOR cam and Header...
- Thread starter
- #10
Fuel pump has about 20,000 miles on it, the filter has about half that, seems to be pretty clean. It's got new plugs (NGK ), new wires and cap & rotor, I checked for the "return" on the distributer, , when the rotor is twisted that's ok other than that I have not checked the coil or igniter though the spark is pretty strong, the thing runs like a top except at idle. Do you suppose it could be the igniter, or maybe something inside the distributer?
Mines smooth also with headers.Once it wasn't and I looked for the easiest.It sounds like you're a real good wrench so I can't tell you.Someone told me that if the distributor gets worn it can idle a little rough.
from what I understand the igniter either works or it doesnt. so i think you can cancel that one off your list.
I'm in the same boat. I just had the head rebuilt (valve job) and after reinstalling the head, I have a slight miss at idle. The funny thing is, it runs perfect when I first start it and then within a couple of minutes it starts the irregular idle. It's less noticeable with the A/C on, probably because the idle is higher. I can't find a vacuum leak and the valves are adjusted. The only thing I haven't changed is the fuel filter and the plug wires, so they're next. I've had people suggest looking at the TPS , throtle possition sensor, which I haven't done, so if you get to the bottom of it, let us know and I'll do the same.
macneill
Rollin’ on 33s
Purrrrrrrrrrrsssssssss... then again, my 2F crate motor only has about 12K on it...
I burn oil at the rate of a qurt every 1000 miles.
But as long as I keep the plugs clean she runs and idles just fine.
The oil ring might be shot but the compression is still good so I guess it will be at least 350000 before I pull her down.
But as long as I keep the plugs clean she runs and idles just fine.
The oil ring might be shot but the compression is still good so I guess it will be at least 350000 before I pull her down.
- Thread starter
- #17
Yes, my idle is smooth until I drive around for about ten or so minutes, then gets a little rough, so it's got to be temperature related somehow, I went thru all the emission connections again today-they were all in order. One thing that is kind of strnge is I did drive around for a half hour or so with the wierd idle, I parked and stated it back up, it idled fairly smooth but at around 500 RPM, ( usualy idles about 850 as that's the smoothest I could dial it in at), and about ten minutes of driving later it returned to it's shakey yet higher idle. I don't know-but when ( if ) I get this figured out I'll let you know.-meanwhile any input would still be appriciated.
HAHAHA!!! yea mine too!!!!!
idle... the 60 series is supposed to idle on its own? News to me.
mine is that with the choke out a lil bit.
