0
Your 1974 small block Chevy starts to backfire 3000rpm and above?
Wiki User
∙ 15y ago
It's lean.
ANOTHER ANSWER:
Or possibly it's valve float.
Try to find an exhaust gas analyzer to see if you're running too lean, if that's not it you may have some valve springs that have become weak.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
Why does my 1979 350 Chevy engine backfire through the carburetor above 3000 rpm?
The valve timing is offAnswersounds like a possible worn camshaft lobe. a fairly common problem on late 70's Chevy small blocks
What would make a 350 chev carby backfire at 3000rpm but only while in gear?
The most common reason for backfire in an engine is the timing is not set correctly. The bad timing could also be caused by the timing chain beingworn out or a camshaft that is worn out. Get a timing light and check to see what the timing is set to. It should be around 8 to 12 degrees before top dead center at idle(800-1100 RPM) with the distributor's vacuum advance disconnected for most Chevy small blocks. There should be a sticker in the engine compartment that gives the idle speed and timing spec. for that model. If there is not sticker, the spec. above should correct your problem if the parts mentioned are in good condition (not worn out).
Is there a fuel pump fuse for a 1994 Chevy Blazer and if so where is it located and could this be why it starts but dies out?
under the hood on the fire wall above master cylinder it is a fuel pump relay
1998 dodge 1500 it will not get above 3000rpm The tranny slips in and out of gear during acceleration you have replaced the plugsrotorcap and wires Check engine light comes on and will flash Code read?
multiple cylinder misfire, in cylinders 5,6,7.
What is a preposition that starts with a?
At is a preposition that starts with "a". Around, among, about, above, and amid are prepositions that start with "a", as well.
What is propositional phrases?
a preposition starts like ( to, from, at, above, below) EX: above the counter
What is the compression for a 1988 Chevy Celebrity?
100 lb or above
What are the symptoms of a bad mass airflow sensor?
If it will start it will lope up and down and act like its running outta gas. I had one backfire and barely run above an idle.
What raises high above the ground and starts with 'm'?
mountain
What is a word that means above ground that starts with sur?
surface
Where is the gas tank on a 77 Chevy Corvette?
Above the spare tire.
Where is the factory amp located on a 1997 Chevy Suburban?
i have a 97 Chevy Tahoe the amp. was above the gas accelerate mounted on a slant
