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hard to start when warm

tarheel

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hey guys. i did a search but couldn't come up with anything useful. /forums/images/graemlins/crazy.gif any how, my bone stock 350 starts great when it is cool even in cold weather, but it takes a few trys before it will start if the engine is still warm/hot. i'm runnin' a 4mv quadrajet. could it be a problem w/ the choke? HELP!!! /forums/images/graemlins/ears.gif
 
[ QUOTE ]
is it a will not turn over or will not fire type of thing /forums/images/graemlins/dunno.gif

[/ QUOTE ]
Ditto. /forums/images/graemlins/thinking.gif
 
I agree...is it hard to turn over when warm? I would definatley check the timing. We really need to know if its spinning over fast and not catching or if its just spinning over slowly.
 
SORRY... ITS TURNING, BUT IT WONT CRANK. STARTER IS WORKING LIKE A CHAMP, BUT THE DAD GUM ENGINE WONT FIRE UNLESS I FLOOR IT AND THEN ONLY AFTER 2-3 SECONDS OF TURNING. AFTER IT DOES START, IT BILLOWS SMOKR FROM THE TAILPIPE AND RUNS ROUGH LIKE IT IS ALMOST FLOODED. WTF!!!??? /forums/images/graemlins/confused.gif
 
OH YEAH... I ALREADY ADJUSTED THE TIMING AND PUT NEW SPARK PLUGS IN. STILL DOIN' IT. /forums/images/graemlins/thinking.gif
 
Mine does kind of the same thing. If it sits for like 45 minutes, it doesn't want to start and when it does, it blows a puff of black. If it sits a long time or a really short time, everything is fine.

I think it has to be one of two things:
1) The choke wants to engage because the carb has cooled, but the engine is still warm
2) The engine heat makes some gas spill over into the intake while it sits. If I waited longer, it would evaporate. I have been meaning to look in the carb sometime while it sits hot.
 
I had that problem in a couple trucks. Both times it was the starter getting too hot to spin fast enough. One on truck I had manifolds w/ duals. On the other it was headers with duals. On both rigs, I had to wrap the starter in the heat sheild stuff. After that, they worked like a champ. May not be the case here, but that is what it was for me.

On this blazer, when I had the exhaust put in, I asked him to run it as close to the frame and as far away from the starter as possible. No issues with this one.
 
It could be that the carb has leaky metering wells,allowing fuel to drain into the intake.They had a kit to fix that problem years ago,a little foam dewhickey you stuffed under the bottom of the carb.I think you can use epoxy too.There is probably some info on how to do this on this site somewhere. /forums/images/graemlins/grin.gif
 

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