I just went through this.

I have an H22A1 engine which sat unused for several years. When I finally started it, it was only running on three cylinders. Taking out the injector showed it had become "glued shut" by old gas, so I sent them to RC Engineering for cleaning. Guess what, same problem, it still ran on three. Checked spark, which was fine. Pulled off injector electrical plug and plugged it back it... it all started working fine. Moving wires around and it continued to run fine. Talked to a mechanic who says he sees this surprisingly often, that due to corrosion on the injector electrical pins, it can keep an injector from working.

Something to watch for if suddenly your ride starts running on three...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kb58 &raquo;</TD></TR><TR><TD CLASS="quote">Pulled off injector electrical plug and plugged it back it... it all started working fine. Moving wires around and it continued to run fine. Talked to a mechanic who says he sees this surprisingly often, that due to corrosion on the injector electrical pins, it can keep an injector from working.

Something to watch for if suddenly your ride starts running on three...</TD></TR></TABLE>

so you didnt replaced the injector?
hmmm interesting

 

Nope, same injector. The place I sent them to, RC Engineeering, does a before and after test, which showed a clear improvement. After cleaning flow was within about 0.1%. So I know the injector itself is good, and apparently the trouble is the electrical connector.

 

What did they flow anyways? THere's been an outstanding question as the how much 4g injectors flow. Other JDM injectors flowed to 345cc! But USDM were generally thought to be morelike 330.

 

This is for a USDM 1995 H22A1:
Inj1: 340.0cc/min
Inj2: 340.0
Inj3: 341.0
Inj4: 342.0

So I guess I lied... they're not within 0.1%, more like 0.6% Still pretty good.