[Blood]

my 99 integra ls is misfiring and i can’t figure out why i’ve replaced plugs, wires, distributor cap and rotor, fuel filter, map sensor, and crank sensor and still nothing it has a rough idle and loss of power also strong smell of gas it’s throwing codes p0301, p0302, p0303, p0304, p0300, and p1399 can someone please help i’ve been stuck on this for like 4 days

 

[jjkz24]

Have you checked valve lash?

 

[Blood]

Have you checked valve lash?

how do u check that

 

[jjkz24]

how do u check that

Valve lash should always be one of the items checked when misfiring is occuring

Search: Valve Lash Adjustment

 

[nsxtech]

Time to start with basic diagnosis instead of the parts cannon. Check commpression, valve timing, valve lash (clearance) and injector operation.

 

[dfddfd2]

P1399 is a Honda/Acura specific code. Diagnostic info here: P1399 causes-fixes