Hi there guys....I've gone thru some of the archived threads and I need more help....first off...the cel. I just swapped an H22 into my 92 prelude si...found that the code is 12 (EGR valve lift sensor)...but before anything...I need to explain something...when I did the swap...I didnt have a downpipe to go with the header.....so I did what i could...and that led to me modyfying my h23 dc sport downpipe to fit the h22 header (will plan on buying a different downpipe soon)...it involved a lot of grinding and welding to allign the holes...so my question is....could this be the cause for the CEL to go on? And I noticed that when the light goes on (after driving a while), I dont have Vtec...Is this normal?...but when the CEL is not on the vtec works good. (CEL dont turn on when I drive hard).

Next item is the ABS...I've had this problem a while now...after driving for a bit...the ABS light turns on.....found out the code is 4 and 8....Dont have a manual so I dont know what these codes stand for...If anyone can give me some insight on where to find these codes (searched the thread but could not find anything)..I would be very grateful.

Thanks in advance to all for ur time and assistance....I really appreciate it.

Aidiz