rcolosi

Figured I'd just run this by you guys and see if there are more things to consider: (2000 Civic DX)

- CEL Codes for random misfire cyl 1 & 2
- Car is fine, but ONLY stumbles under load/acceleration and only at cruising speeds. Idles perfect, starts perfect
* replaced:
- distributor/Ign module/coil
- Wires & plugs
- Fuel pump & filter
- swapper injectors 1/2 to 3/4...same codes for cyl 1 & 2 persist
- Timing belt was swapped a while ago for routine maintenence

any other obvious things?
Thanks!

davidpaustin

One thought would be to check your IACV. I know it sounds odd, considering your idle is fine, but I had an issue with how my car was driving and after I pulled the IACV I cam to the realization that the guy I bought the car from, was probably running water instead of coolant. There was a large piece of rust flapping back and forth inside the IACV causing major issues, particularly when in low rpms.

rcolosi

Thanks!!

01hxcivic

Had a similar problem with 01 civic, cleaned injectors problem went away.

rcolosi

Just got it back.. my guy found the fuel pressure regulator vacuum hose kinked badly and the valves were all very tight .001" -.002" Runs perfectly now. Not what i expected, but it works!