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Old 08-18-2003, 07:02 PM
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Fire in carb (take 2)

I have re-double checked the timing so many times that im certain it is correct.
Now, i had my brother crank the engine as i turned the dist. The engine ran for a few seconds and another explosion in the carb occurred.
It only turns over when the carb is at full throttle and primed with a couple squirts of fluid from the jets. The carb is a Holley 750 Double Pumper. (brand new)
Could my problem be that the carb needs adjustment??

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Old 08-18-2003, 07:21 PM
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Sounds like it is flooded. Easy to do with a double pumper.
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Old 08-18-2003, 07:36 PM
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now that your certain the timing is set, go over the spark plug wires one at a time and make sure you don`t have any cross wired, as it`s very easy to do. if it is, it`ll pop thru the carb and run real rough.
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Old 08-18-2003, 07:40 PM
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The engine sounded great til' the explosion in my face...lol. Im certain the wires are straight as well.
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Old 08-18-2003, 07:52 PM
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I agree with DoubleVision, at least you can check your wire's out.
You stated you checked the timing not the wires. Please do it.
I dont know of anyone that holds the carb WOT to start it,
half way will do it with that DP, thats alot of gas.
Hows the float level?
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Old 08-18-2003, 07:56 PM
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I have no idea of how i would check the float level.
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Old 08-18-2003, 08:11 PM
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You said it yourself, "holley double pumper" I think the problem lies there. Buy a Q-jet!

So tired of hearing stories of holleys blowing up, cause it's so common its rediculious.
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Old 08-18-2003, 09:07 PM
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Quote:
Originally posted by 87442lover
You said it yourself, "holley double pumper" I think the problem lies there. Buy a Q-jet!

So tired of hearing stories of holleys blowing up, cause it's so common its rediculious.
Exactly!! Can't go wrong with a QJet.
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Old 08-18-2003, 09:45 PM
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Tech help please.
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Old 08-18-2003, 09:57 PM
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Seriously I have no idea, and seriously I have also blown up a holley that burnt a good deal of my hand, but it was pretty flames

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Old 08-18-2003, 10:02 PM
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How much does a Q-jet cost and what faults do they have?? How does a Edelbrock 750 compare as well as any other decent carb?? Im ready to scrap the holley if it doesnt have a sure fix.
Scratch this reply, ill follow lilbandits thread on carbs.
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Old 08-18-2003, 10:07 PM
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Only Q-jet faults are that it bogs any car down if you mash the peddle down. I've heard this is cause by the carb dumping gas into the intake and bogging the engine for a sec. but I honestly dont know. Once you know a Q-jet thought its hard to go back to anyhting else cause you know how hard to press the gas, its almost like you have to ease the pedal down with the sound of the engine until the secondaries open up and you get an amazing rush hearing that odd sound they make and it pushing you back into your seat.

The only good holley is the TBFI system they make, I'd trade a Q-jet for that anyday, plus it can be turbo charged with-out any mods.

EDIT: BTW There is also another company called www.predatorcarb.com that makes the predator. It doesnt follow any traditional carb rules at all. It is just a huge open box that has some nozzles in it. It's not a TBFI, but its not a carb ether. Heard nothing but great reviews about it.
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Old 08-19-2003, 12:03 AM
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You said the holly is a new one so it`s got warranty. Holly also has a very good tech. dept. They are very good carburetors so don`t give up on it yet.

The firring or valves are not just right or it would not backfire.
sometimes these things are not simple fixes, so don`t give up on it. Good Luck And Have A Nice Day.

Troy,
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Old 08-19-2003, 12:13 AM
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as troy said... its something else wrong with the engine... you can have a carb thats giving a TON of fuel to the engine and it will never backfire (lean is a different story, even then it's different from what you are describing) there has to be something to start that fire and a path for it to follow to the carb. If your ignition is firing at the proper time then a valve is allowing that fire to travel up to the intake. If the vavles are in time then the spark is coming too early... allowing the fire to travel up the intake
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Old 08-19-2003, 12:59 AM
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There was absolutly nothing wrong with the timing on that mustang I was working on and it still blew up! I just dont trust em. but too each his own, so let me shut-up
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