CK5
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Crew cab. Use it or lose it.

So was the trim chrome and you painted it all? I plan on doing the same to my stuff the same as yours but wasn't sure how good it'd stick :dunno:

I watched him take sand paper to perfect new chrome pieces :doah::doah:

I think he did it just to spite me:haha:
 
That's kinda sarcastic since I have some of it on The Blazer.
 
So I've run into a snag. Kinda different symptoms than what I'm used to.

Fuel starvation.

Crank the engine over and it pops and then nothing. I can keep it running if I pump the heck out of the throttle. Definitely not a good smooth run though.

I have fuel pressure. Serviced the filter after the tank. Cracked the pump bleed port. Cracked the line at the pressure regulator and also replaced the filter at the carb as well as cracked the line with the pump running to verify fuel at the carb. All good. Only thing else is something inside the carb.

I have had needle and seat get plugged before, which causes the exact opposite. Total flooding. I've never had it this way.
 
did your idle screw get turned down?
If its getting fuel by pumping the throttle it should have fuel in the bowl, but maybe the idle circuit is not opening or plugged.
Did you get the timing set to TDC after it being off a tooth?
 
Idk if it would make a difference but if theres a gasket that is sucking air wouldit cause this? :confused: I really don't know. Just an idea possibly.
 
did your idle screw get turned down?
If its getting fuel by pumping the throttle it should have fuel in the bowl, but maybe the idle circuit is not opening or plugged.
Did you get the timing set to TDC after it being off a tooth?

Actually, i turned the idle up a bit just after I got it timed.

Yep, everything got set to TDC. Set the timing gun to advance the timing 10 degrees and walked it in. Ran smooth for a bit. Backed it out of the shop and went to go around the block and to the gas station. Very low on fuel. Got half way around the block and it died. Hasn't run since. That was Sunday night.

Tonight I did all the fuel system checks and got nowhere. :dunno:
 
Idk if it would make a difference but if theres a gasket that is sucking air wouldit cause this? :confused: I really don't know. Just an idea possibly.


Possibly. Haven't messed with any gasket seals on the carb, intake or anywhere else for that matter. Not to say that it couldn't be a massive vaccum leak. I have checked all the hoses to make sure nothing was knocked off. All looks good. I don't hear any sucking noise when it fires, admittedly a very short time span to listen.
 
Did you pull the fuel line to see if it was pumping ?

What kind of carb?

Is the float stuck down some how?

Yep, pulled the line in several spots along the way to check the flow. All good. I know the carb is getting fuel.

Quadrajet. 850 cfm factory from a cadillac 500, rebuilt by jet performance last year some time. They did an excellent job and it ran well for quite some time.

Wouldn't the float have to be stuck up for it to starve for fuel?

I'm thinkin' its just gummed up inside or something. I did sit for a while. Two fuel pumps died and could well have sent debris down stream. I was forced to run without a filter at the carb for a very short time over the BB2010 trip.
 
So it won't even start now right?

Sounds like some junk in the carb to me. ( I know I know I am a HUGE help)

I typically go to that when I can't figure out anything else for a carb problem. Float could be stuck up, not sure really.

It sounds like something was in there or got sucked up from the bottom of the tank and somehow made it past the filters, or its something that has been in there since you ran without filters and is now causing the problems.

Will it rev up at all?

Do you have to pump it all the time to keep it running or will it run at say 2500 rpms?
 
So the carb is getting fuel, isn't it easy to remove the air cleaner and see if the carb is supplying fuel to the engine? Or just pour some in the engine, shouldn't take long to confirm/eliminate that variable. You probably know to go back to the basics. Air, fuel, spark.

Also, did it start doing this right after you changed the timing? Are you sure the tinig marks are correct, etc? You might want to use a piston stop through the spark plug hole and double check TDC if all else fails.
 
Another possibly useless shot in the dark but what the heck.

You have a carb and I assume HEI type ignition or caddy version and you have been doing some wiring. Do you still have full 12 volts going to dizzy after vehicle starts and ignition switch is released or does the voltage drop.

Had this problem after swapping to HEI from points and once after putting an hei motor into a NON HEI rig. :dunno::popcorn:
 
His truck was HEI from the factory. The problem you ran into was installing an HEI into a vehicle originally equipped with points, and not removing the ballast resistor.

Martin
 
So it won't even start now right? Nope, well, it fires and dies immediately.

Sounds like some junk in the carb to me. ( I know I know I am a HUGE help)

I typically go to that when I can't figure out anything else for a carb problem. Float could be stuck up, not sure really.

It sounds like something was in there or got sucked up from the bottom of the tank and somehow made it past the filters, or its something that has been in there since you ran without filters and is now causing the problems.

Will it rev up at all? No revs.

Do you have to pump it all the time to keep it running or will it run at say 2500 rpms?
Can't get it up to 500 rpm's. Just sputtering if you pump the pedal like a mad man.

So the carb is getting fuel, isn't it easy to remove the air cleaner and see if the carb is supplying fuel to the engine? Or just pour some in the engine, shouldn't take long to confirm/eliminate that variable. You probably know to go back to the basics. Air, fuel, spark.

Went back to the basics right away and trouble shot everything I could.

Also, did it start doing this right after you changed the timing? Are you sure the tinig marks are correct, etc? You might want to use a piston stop through the spark plug hole and double check TDC if all else fails.

The stupid part is, after adjusting timing, starting from TDC, it sat in the shop and idled smooth for a couple minutes while some things were moved out of the way to get it out of the shop. Backed it out carefully (read slowly) and then goosed it out in the alley, thinking it feels good to have my truck back. Drive around the block and dead. I think this sort of eliminates alot of stuff right off the bat. Not saying I didn't go back and check things.

I pulled the carb tonight. I didn't have time to pull it apart though. I'll get into that sometime tomorrow.
 

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