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Username Post: 1966 283 stalls when idling and warm        (Topic#291217)
1belair1954 
Contributor
Posts: 100

Reg: 12-24-12
12-24-12 11:02 PM - Post#2300848    

Hi all new to this forum but been reading for a while, wanted some suggestions from the knowledgable people here.
I have a completely stock 66 nova with 283 2bbl carb and powergide trans. my problem started a few weeks ago when the car is warm and comes to a stop it stalls.
I rebuilt carb a couple of months ago and car was running fine after installation. Ive gone through ignition system replaced plugs & leads, set dwell and experimented with ignition timing currently at 6 btdc no change.
After car stalls if i remove aircleaner and manually depress throttle, accelerator pump shoots fuel into throttle body(it does this several times) so fuel is getting to the carb. I double checked my float level when i rebuilt my carb as i know this can be a problem with the 2gv carb.
My car has the original AIR reactor system (smog pump) but i also disconnected this, still no change to stalling.
Car runs great with heaps of power when driving only problem is at idle when warm when cold it runs good also.
Could problem be obscure such as a faulty coil or condensor? Ive been around cars for a while it definetly sounds like engine dies from a lack of fuel but carb having fuel in it probaly dismisses this theory. Car is hard to start car again after stalling and need to give it a few pumps of fuel and keep the revs up.
Any suggestions appreciated thanks in advance



 
Ecklers AutoMotive
Allan In NE 
Frequent Contributor
Posts: 1990

Reg: 12-27-11
12-25-12 03:16 AM - Post#2300869    
    In response to 1belair1954

Check for a vacuum leak.

Allan

Lifelong GM automatic transmission specialist


 
dadstoy 
Frequent Contributor
Posts: 1426
dadstoy
Age: 66
Loc: Lewisburg Ohio
Reg: 04-01-07
12-25-12 07:27 AM - Post#2300899    
    In response to Allan In NE

Make sure the choke is fully open when the engine is warmed up.

Larry.

1965 Impala convertible 396
1965 Impala 9 pass wagon 283


 
62chevy427 
"12th Year" Silver Supporting Member
Posts: 2165
62chevy427
Loc: laurens sc
Reg: 04-13-06
12-25-12 09:59 AM - Post#2300927    
    In response to 1belair1954

i would check all idle air and fuel passages. take a small drill or wire and stick it in the holes/transfer slotts etc. clean with more spray carb cleaner. blow out with air.

56 bel air ((since 2002)
62 impala ss (since 1965)
65 el camino (since 1969)
66 nova (since 1987)
67 malibu convertible (since 1981)
72 el camino ss454 (since 1985)
83 gmc 4wd (since 1991)
95 impala (new)
15 chevy equinox



 
FINMAN 
Frequent Contributor
Posts: 1326

Loc: Burlington , Mass
Reg: 03-01-05
12-25-12 12:46 PM - Post#2300952    
    In response to 62chevy427

Stuck heat riser on pass side exhaust manifold.



 
1belair1954 
Contributor
Posts: 100

Reg: 12-24-12
12-25-12 04:43 PM - Post#2300987    
    In response to FINMAN

thanks for replys
choke fully opens when warm
Ive checked for vacuum leaks also couldnt find anything
Will check heat riser valve today this could be the issue, i will probaly remove carb next and clean as mentioned but i have my doubts its this as it idles fine for about 10 mins during warm up i seem to have this stalling problem when engine is hot.
Will get back with my findings thanks again



 
1belair1954 
Contributor
Posts: 100

Reg: 12-24-12
12-25-12 06:36 PM - Post#2301012    
    In response to 1belair1954

Hi Finman i think you could be right heat riser valve spring dislodged itself from mounting pin so valve was moving around freely. Paint on manifold around heat riser passage burnt off so it was running hot havent taken it for a drive but i think this is the problem.
thanks again



 
novice66 
Frequent Contributor
Posts: 1173
novice66
Age: 35
Loc: san antonio,tx
Reg: 05-06-07
12-25-12 10:46 PM - Post#2301056    
    In response to 1belair1954

I can't remember too well since I have not seen that area in a while but wouldn't that rod being dislodged not actuate the fast idle cam as well thus causing more improper idle fuel mixture? Kinda a two fold problem.

<a href="http://www.picturetrail.com/uid9870823" target="_blank"><B& gt;Visit My Trail</B></a>


 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-05-19 10:51 AM - Post#2769987    
    In response to 1belair1954

Hello !

Have you found the issue?
I do have the same issue, please help!!!





 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-05-19 10:53 AM - Post#2769988    
    In response to FINMAN

  • FINMAN Said:
Stuck heat riser on pass side exhaust manifold.



I do have the same issue, is this riser on the INTAKE manifold, or EXHAUST manifold? Could not find anything on the exhaust manifold...

Any pics?




 
Oshawa65SS 
Contributor
Posts: 919

Age: 59
Loc: Burnaby BC Canada
Reg: 09-22-14
07-05-19 10:27 PM - Post#2770022    
    In response to gornati

Here's a typical example that happens to be from a 70 Chevelle.
Check that the lever moves back and forth freely is all.


Ryan

65 Impala SS convertible 283 2V with Powerglide and 10 bolt 3.08 open
Build date Dec. 21 '64 Oshawa


 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-06-19 07:37 AM - Post#2770038    
    In response to 1belair1954

  • 1belair1954 Said:
Hi all new to this forum but been reading for a while, wanted some suggestions from the knowledgable people here.
I have a completely stock 66 nova with 283 2bbl carb and powergide trans. my problem started a few weeks ago when the car is warm and comes to a stop it stalls.
I rebuilt carb a couple of months ago and car was running fine after installation. Ive gone through ignition system replaced plugs & leads, set dwell and experimented with ignition timing currently at 6 btdc no change.
After car stalls if i remove aircleaner and manually depress throttle, accelerator pump shoots fuel into throttle body(it does this several times) so fuel is getting to the carb. I double checked my float level when i rebuilt my carb as i know this can be a problem with the 2gv carb.
My car has the original AIR reactor system (smog pump) but i also disconnected this, still no change to stalling.
Car runs great with heaps of power when driving only problem is at idle when warm when cold it runs good also.
Could problem be obscure such as a faulty coil or condensor? Ive been around cars for a while it definetly sounds like engine dies from a lack of fuel but carb having fuel in it probaly dismisses this theory. Car is hard to start car again after stalling and need to give it a few pumps of fuel and keep the revs up.
Any suggestions appreciated thanks in advance


Have you found a solution for this??

I already replaced the following:

-condenser/capacitor;
-ignition breaker points;
-fuel pump;
-fuel filter
-rebuilt carburetor;
-removed the exhaust vale;
-tuned engine with -13 degrees;
-checked for vacuum leaks;
-rebuilt alternator;
-distributor rotor

The few things that havenĀ“t been done is replace spark plug wires and spark plugs, which will be done next wednesday!


Any other ideas?
what about the distributor cap? i dont think this could be the issue but...




Edited by gornati on 07-06-19 07:39 AM. Reason for edit: No reason given.

 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-06-19 07:38 AM - Post#2770039    
    In response to Oshawa65SS

  • Oshawa65SS Said:
Here's a typical example that happens to be from a 70 Chevelle.
Check that the lever moves back and forth freely is all.




This one it was already removed! thanks for the pic!




 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-06-19 07:41 AM - Post#2770040    
    In response to dadstoy

  • dadstoy Said:
Make sure the choke is fully open when the engine is warmed up.


what is the correct position for the choke when it is fully open??





 
6T5 
"2nd Year Gold Supporting Member
Posts: 215
6T5
Age: 67
Loc: Asheville, NC
Reg: 07-22-17
07-06-19 07:56 AM - Post#2770041    
    In response to gornati

Carb choke butterfly will be straight up and down will fully warmed up...

...Ed

1965 Impala SS


 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-06-19 08:39 AM - Post#2770044    
    In response to 6T5

  • 6T5 Said:
Carb choke butterfly will be straight up and down will fully warmed up...


will let the car heat and check, but i DO believe my choke is disabled...



 
6T5 
"2nd Year Gold Supporting Member
Posts: 215
6T5
Age: 67
Loc: Asheville, NC
Reg: 07-22-17
07-06-19 10:16 AM - Post#2770051    
    In response to gornati

With the engine cold, take off the breather and look at the position of the carb butterfly. Next move the throttle linkage as if giving it gas, if the butterfly was straight up and didn't close after moving linkage then it is disabled in the open position. If it did close, warm up the engine to be sure that the choke opens up completely. If it does open all the way then your problem is somewhere else. Let us know...

...Ed

1965 Impala SS


 
A White Sport Coupe 
"9th Year" Silver Supporting Member
Posts: 399
A White Sport Coupe
Reg: 08-19-10
07-06-19 04:35 PM - Post#2770070    
    In response to 1belair1954

You didn't mention the mixture setting. Turn the mixture screws in until seated and retract them 1 and 1/2 turns. This is the starting point for fuel mixture adjustments and rarely needs changing.

Bob


 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-06-19 05:23 PM - Post#2770073    
    In response to 6T5

  • 6T5 Said:
With the engine cold, take off the breather and look at the position of the carb butterfly. Next move the throttle linkage as if giving it gas, if the butterfly was straight up and didn't close after moving linkage then it is disabled in the open position. If it did close, warm up the engine to be sure that the choke opens up completely. If it does open all the way then your problem is somewhere else. Let us know...




Will do it tomorrow, with pictureS!!!!




 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-06-19 05:24 PM - Post#2770074    
    In response to A White Sport Coupe

  • A White Sport Coupe Said:
You didn't mention the mixture setting. Turn the mixture screws in until seated and retract them 1 and 1/2 turns. This is the starting point for fuel mixture adjustments and rarely needs changing.



Carb has been rebuilt.

can i post videos here?




 
impala 
Frequent Contributor
Posts: 1277
impala
Loc: Pittsburgh, PA USA
Reg: 07-13-00
07-09-19 04:38 PM - Post#2770316    
    In response to gornati

  • gornati Said:
  • A White Sport Coupe Said:
You didn't mention the mixture setting. Turn the mixture screws in until seated and retract them 1 and 1/2 turns. This is the starting point for fuel mixture adjustments and rarely needs changing.



Carb has been rebuilt.

can i post videos here?



Rebuilt carb doesn't mean mixture screws are where they should be. I bought my kit from Carbking (nice kit, leather pump) and he was very adamant about setting the screws at 1 1/2 turns with no further adjustment. I can't remember his exact reason for doing this but I followed his instructions and my 283 runs and idles perfectly.
impala


61 Impala Convertible, AACA Senior Grand National
99 Jaguar, XK8
13 Avalanche LTZ
18 Equinox


 
gornati 
Poster
Posts: 9

Reg: 07-05-19
07-12-19 02:25 PM - Post#2770546    
    In response to impala

Guys, replaced the spark plug wire and distributor cap, problem is gone!
Spark plug cables were all dried out and hard.

Will run the car for a couple of days and i will let you guys know again!

Thanks for the help!




 
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