On this 90 Civic DX the motor has taken to very hard starting and rough running when cold. Before it warms up it sputters and chugs like it's missing under acceleration.

 

i had a 94 dx that did the same.. it wuld sputter accelerated and i changed the plugs, wires, and distrbuter cap.. and it still did it. turns out it was the rotor button.. hope this helps

 

was not the plugs and wires. 6 months agao I replaced the Igniter and the cap and rotor. It seems like an ignition prolem. What should I try next?

 

Does it run perfectly when warmed up?

If it was a sudden (i.e. instantaneous) decrease in performance you should consider a skipped timing belt, check the cam timing.

Don't assume that 6 month old wires are still good if they're aftermarket.

 

Naww, It used to be my car. I replaced the cap and rotor among - Oreilly 's - else. Months later it turns out it cuts out and is hard to start, Didn't change after new wires and plugs yesterday injectos or ignition..?

 

here's the bump update on this problem. New plugs and wires and it does the same thing: cuts out/misses under acceleration when cold only.

I don't know the right cylinder numbers but the cylinder farthest to the drivers side, to the best of my recollection, gives a whitish blue spark. The other three cylinders' spark plugs produce a dim orange spark. What is causing this?