76 rough idle
Racer
Joined: Mar 2006
Posts: 366
Likes: 1
From: Houston Texas
Could be lots of things, but here are the easiest to check:
Fire - check the condition of the spark plugs and plug wires. Unless all 8 cylinders are firing it will run rough.
Filters - check the fuel and air filters. If they have trapped a bunch of stuff flow is restricted and the engine can run rough.
A bit more difficult to check but not too bad:
Fuel - make sure you are getting plenty of gas to the engine. A dirty carb or fuel pump that isn't getting enough gas to the engine can cause it to run rough. A bad tank of gas can also cause a rough idle.
Compression - make sure you have good compression on all cylinders. Low compression can act like a bad plug or wire.
Fire - check the condition of the spark plugs and plug wires. Unless all 8 cylinders are firing it will run rough.
Filters - check the fuel and air filters. If they have trapped a bunch of stuff flow is restricted and the engine can run rough.
A bit more difficult to check but not too bad:
Fuel - make sure you are getting plenty of gas to the engine. A dirty carb or fuel pump that isn't getting enough gas to the engine can cause it to run rough. A bad tank of gas can also cause a rough idle.
Compression - make sure you have good compression on all cylinders. Low compression can act like a bad plug or wire.
Burning Brakes
Joined: Oct 2006
Posts: 1,006
Likes: 28
From: Lutz Florida
Check for a vacuum leak somewhere too. Maybe a hose has a crack in it or one popped off. Check all the vacuum lines including the one that runs down to the vacuum modulator on the transmission if your car is automatic.
Drifting
Joined: May 2006
Posts: 1,480
Likes: 2
From: Circleville Ohio
Vader vette
I had a 350 in A del . truck I owned and once in a while it would spitter and sput on Idle I took the Jets out blew them out and down the raod Id go something Like suger in my tank and it would lidge up in the jets for some reason. Clean out the jets.
