Thread: bbchevy 454 won't start-help

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hello people im pretty new around ,, but i got a problem with my 454 , it wont start i dont why , its got gas and spark , i checked the firing order and its all right i dont why it wont start please somebody help...

I hope somebody can tell him what's wrong. I got the same problem with my Jeep. It ran fine last summer but when I put the battery in today it wouldn't start. It doesn't have a 454 but it sounds like exactly the same problem. I don't have time to diddle with it so I'm hoping some automotive genius will solve my problem while I take a nap.

Hey! By past experience I can tell you, if there is current to the spark plugs and gasoline in the carburator/ injectors, your timing is ok, no back fire or carburator explotions change to a new set of spark plugs, AC Delco, preffered, that will take care of your starting problems. or even better just thing last time you changed the plugs........... Hope that will help.....

Can I ask an honest question ? "how much experience have you had on cars ?

I'm not trying to josh ya, but we are all basicly asking, did you work on it before having this problem ? Did the car sit for a While ? If you worked on it , what did you do ? We need the information, we're not mind readers (yet). Thankyou

How long has this thing been sitting or do you drive it a lot?

Hello. I am new to this forum as well and am having the same problem: my 454 will not start and then idle. It'll turn over fine, but it will not start. Just a brief history, I replaced the fuel pump with a Holley electric pump from the original old purolator that I had on it. I also placed a bigger carb on it from a 625 cfm Carter carb and some new Bosch spark plugs. Due to my upgrades, now the engine will not purr like it used to; it runs like crap (when I can get it started). When I can get it started, it'll have to crank over many times, but it'll just die after a few seconds. Even if it does run for a period of time, it will not allow me to press on the gas pedal because it'll die even then. Sometimes it will spit out fuel and then die. Sometimes the carb even caught on fire.

Before I had it timed at 4 degrees BTDC with the fuel pressure at 4 psi; that is when it ran and had no trouble.

So far I've checked the float levels and they are adjusted correctly, checked the firing order sequence and that is correct. All of this trouble makes me want to take all of the new upgrades on it and put the old stuff back on.

Any thoughts?