I just have someone did a swap of a 2001 gsr into 2000 Lx civic. I use the 2000 si harness and 2001 gsr ecu. Random misfiring in 4 cylinder. Change the ignition wire. spark plug. distrubitor, and fuel regulator. Check the fuel pressure, injectors, map sensors, no problem with them. Then take it to the acura dealer and have valve adjustment. Still did not fix the problem. Don't know what to do. Need some serious help. Thanks

 

Under what conditions does it misfire?

Light load?
WOT?

 

Did you check compression?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by _Edge.ONE &raquo;</TD></TR><TR><TD CLASS="quote">Did you check compression?</TD></TR></TABLE>
i would start there then if thats low a cylinder differential pressure test. (leak down)

 

light load. I did a compression test and all 4 cylinders are fine. Thanks

 

what is a low a cylinder differential pressure test. (leak down). Thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dayaftertomorrow &raquo;</TD></TR><TR><TD CLASS="quote">light load. I did a compression test and all 4 cylinders are fine. Thanks</TD></TR></TABLE>

did you do a running compression? if it is isolated to one cylinder, check the plugs, and other parts related to cylinder that has the problem.

 

Since you pretty much replaced your whole ignition system,all that leaves is fuel and or/ mechanical problems...

Id try running some sort of intake system cleaner such as Seafoam or BG through the intake to clean any buildup on the valves...If that doesnt help,swap injectors from the affected cylinder w/ another and see if it follows it...

No other codes right?

 

don't the 2001 gsr ecu's have an immobilizer, how did you defeat this? Maybe it is your ecu?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dayaftertomorrow &raquo;</TD></TR><TR><TD CLASS="quote">what is a low a cylinder differential pressure test. (leak down). Thanks</TD></TR></TABLE>

anything more than 15% difference.

 

it a 2001 engine with 36,000 miles. The fuel pressure is fine and for the injectors, are all b series engine the same?

 

I got the igniton switch from the integra. The dealer programmed the key for the ecu.