My H22A4 > H22A swap went flawlessly.

The engine runs perfectly... except I got 1 code the other day after about 140 miles of driving.

I got a code 70 or 71 - Misfire Detected Cylinder #1

I've got new wires, new plugs (gapped correctly), and everything, I mean everything, was checked and cleaned during assembly.

However, I think that I may have been about 2mm off with the alignment of the cams when I set them to TDC for the lash adjustment on #1.

I'm assuming that I may have adjusted #1 a little to tight.

Would that cause an occational misfire code?

I have been having issues with the OEM distributor, but I've got another ignitor on the way... I plan on swapping that out just to be safe.

Gerhard

PS Yes, I'm using 92+ octane gas.

 

How are your injectors? What did you use? OBD1 or OBD2?

Keith

 

AS far as I know my injectors are fine.

I used the OBD-II setup from the old motor. So the entire car is OBD-II with the P5M ECU.

I'm not getting this all the time... just once so far.... but I don't want a lean codition and a misfire to happen to much...

 

For jokes, why not mark and swap the injectors from cylinder to cylinder to see if the miss fire follows it...

Keith

 

Ok... that's an interesting idea....

They were fine before the swap... but I guess it's possible that the H22A is a little more fuel hungry?

I'm going to re-adjust the valve on #1... and then put in the new ignitor and see what happens.

 

Well,

I was able to do the valves this afternoon. I can tell you that they were all a little tight. Especially - Cylinder #1.

So I replaced the ignitor (using some heat sink grease on the back) and put everything back together.

Started the car... no codes.

So... time will tell.

The valve train was certainly a little less noisey. Honestly, I think the problem was the very slight difference between the cam gears in the H22A and the H22A4. I can't put my finger on it exactly... but my old motor looked different when I had the cam gears aligned.