Ok, I've been having this problem for a couple of months now and I need help diagnosing it. For some reason #2 cylinder is consistently running leaner than the other 3. I have tried to fix this by doing a number of things, first I used fuel injector cleaner, then I tried swapping out injectors. Neither worked, so right now I don't have a clue what it could be. What can be causing this problem, any ideas? Yack at p1auto is about to pull my the head off in a couple of weeks, is there anything I should look for? Here are the pics of my spark plugs.

 

Compression test all four cylynders and see what no 2 comes out as,
Are u runnin a stock ecu
and Fuel pressure Regulator?
if not check out your fuel pressure across your Rpm on the Dyno.
I had a similar problem but it was cylinder 4

 

Oh I forgot If none of the above yields any info check your intake and exhaust valves for correct tension or any undue wear on cylinder 2

 

My bad, Yeah i already did a compression check, valve adustment, and i switched out spark plugs too. My compression numbers were 235,230,235,225 #2 actually had one of the higher numbers. I have a b&m fpr and chipped p28 ecu on right now, but this problem was occuring months before i put those on. Oh and my car burns oil too, about 1/2 a quart every 1000 miles, hope this helps


Modified by VTHokie at 5:24 PM 5/14/2003

 

Anyone else?

 

valve guides - the compression numbers dont seem to say that your rings have crapped out on you...

Yack WILL find the answer

 

1. Distributor?
2. Plug wires?
3. Fuel rail?
4. carbon deposits in #2 cylinder?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Big Phat R &raquo;</TD></TR><TR><TD CLASS="quote">1. Distributor?
2. Plug wires?
3. Fuel rail?
4. carbon deposits in #2 cylinder?</TD></TR></TABLE>

Hmmm.... don't think its 1 or 2.


Maybe 3 cause im using a 00 si fuel rail right now, but I don't think it is.

I'm hoping its something as simple as carbon deposits.

 

Anyone else? I'm lost here

 

Im gonna say an issue w/ your fuel rail.

 

Try switching your injectors around and then looking at your plugs again after a few 100 miles.