Cascade Crew

'92 camaro boss · Posted: Sat Nov 15, 2008 1:38 am Post subject: Engine misses

Ok, well once again another question about my el camino

i got it all back together, IT IS TIMED CORRECT, and everything sounds great at idle..

if you go to give it gas or get it into higher rpm's it will backfire.. is it my carberator or is it somthing else?.. i have a brand new just out of box edelbrock intake.. and a suposibly rebuilt carb.. the carb is going to get replaced if i can ever afford a brand new one or if someone has a used one laying around for a ok price that they know works, if so please let me know Smile

the carb's a 750 cfm.. bit too beefy for my (as far as i know) stock motor..

any help is much apperciated

batcave · Posted: Sat Nov 15, 2008 10:19 am Post subject:

sounds like a bad intake or exhst valve if its a holley carb bad power valve

Twilightoptics · Posted: Sat Nov 15, 2008 1:26 pm Post subject:

That carb is WAY too big for a 305 or 350 in stock form.

Unless it's a Q-jet.

By backfire... do you mean out the exhaust or through the intake?

Through the intake is usually an indication of valve train, too much timing, or a lean condition.

'92 camaro boss · Posted: Sat Nov 15, 2008 5:00 pm Post subject:

it's a carter.. and it goes "pop!" then spits out flames outta the carb..

didn't know it was possible to have a bad intake... this one's out of the box new... and the heads are rebuilt.. maybe i need to adjust the rocker arm's?

it's a 400 block i know that much..

Twilightoptics · Posted: Sat Nov 15, 2008 5:15 pm Post subject:

Sounds like timing/firing order to me.

Or an intake valve is stuck open.

Rechecking timing and firing order. And adjust the rockers.

'92 camaro boss · Posted: Sat Nov 15, 2008 5:17 pm Post subject:

will do, thanks alot tomarrow morning i'll get out there and hopfully have a finished product

Twilightoptics · Posted: Sat Nov 15, 2008 5:18 pm Post subject:

Make sure you've set timing up on the #1 TDC COMPRESSION stroke. And not TDC on the exhaust stroke.

1-8-4-3-6-5-7-2!

Numbers to live by. Very Happy

And don't set the rockers by the book.

Exhaust Open - Set the Intake Valve
Intake Closed - Set the Exhaust Valve

If it's a hydro, set it to 1/4turn past zero lash. No farther.

'92 camaro boss · Posted: Sun Nov 16, 2008 2:11 pm Post subject:

Alright, well it ended up being the carb, i bought an adpter plate and put the stock 2 barrel on and it run's like a champ now..

if i get a 4 barrel by dyno i might see about bringing that car and a friend come with in the camaro..

Twilightoptics · Posted: Sun Nov 16, 2008 2:27 pm Post subject:

Don't know about your area, but there are some Carbuerator shops in town here that do well with trade ins and can help setup a carb to your particular application.

You might see if there is a place like that around your area.