What is the standard valve clearance and ignition timing of my honda civic 1991 carburator type car ...... engr. joey of science city of munoz

Cold misfire could be due to the following reasons:
- Ignition timing too late.
- Spark plugs gap too wide.
- Faulty spark plug wires or distributor assembly.
- Weak engine compression, or valve clearance too low.
- Leakage in the vacuum hose or intake manifold.
- PCV valve faulty.

Reasons for popping noise:
Popping noise could occur due to the malfunction in the ignition system, leaky valves, weak cylinder compression, carbon accumulation in the combustion chamber or lean fuel.
1. Ignition system malfunction (Misfire).
Check:
- The ignition timing.
- Spark plug gaps.
- Use colder type spark plugs.
- Ignition module and ignition coil.
- Distributor cap and rotor.
- Spark plug high tension cords.
2. Cylinder compression:
- Check valves clearance.
- Perform cylinder compression test.
3. Fuel system (For lean state).
- Check fuel filter for clogged.
- Check fuel injectors.
- Check fuel pump pressure.
- Check fuel regulator.

posted 102 times.
here is 103
http://hondatech.info/downloads/Auto/Manuals/Civic/

there are huge numbers of engines used.
the first job is to learn what yours is.
do the cam belt before you bend the valves (hint)
lash is a side order dish to belt swap... fact.! at 60kmiles

This problem can arise due to the following reasons:
- Air leak in the intake manifold.
- Vacuum hose leak.
- Throttle body gasket leak.
- Idle speed control valve stuck open due to the carbon deposits.
- Valve clearance too less.
- Ignition system faulty. (shorted spark plugs, spark plug wires, ignition timing too late or too early).
- Fuel injectors faulty.

hi
What the valve clearance for a big boy 200cc flame bike
And do i have to do 360 rotate doing one and then another 360 for the other or both on the same tdc

Thanks alot

intake .007 exhaust .009

its hard to tell, sometimes they would..... but easy to check before hand, take the valve cover off and check valve clearance as if you were going to adjust the valves, if any valves have way too much clearance the valve is bent.. The valve spec is on a decal under the hood.

sometimes ur carburator valve gets stuck,if not, well,is ur belt still on?

Several causes possible.
Carburattor or injection type?
Carburator >> auto choke faulty.
Carburator >> mixture very wrong adjusted
Drawning carburator (needle/floater)
Distributor weights cannot move (dirt/rust spring broken)
Very dirty airfilter, or clogged airfilter
Faulty ignition cap. Check contacts, especially middle one if oldfashioned and nonelectronical.
Ignition timing set incorrectly.
Fuel pump broken.
Fuel filter blocked almost.
Vacuum line damaged.
Exhaust internally clogged by loose plate (corrossion) (potato in tailpipe effect).
And very seldom, water or diesel.

And a list of a lot of other things.

Its the electrical part of the ignition switch.. thats pretty common for a 91 Honda