You need to program ecu to inject right amount of fuel elsewhere engine will run rich

You will need ecu with vtec controll and remap it to work with 1400cc engine

Do you think this has to do with a problem I face now and then that the car won't start and the key lamp stays on? If the green key lamp comes on about 2 seconds and after blinking always until you turn off the ignition and does not start engine then it is immobilizer issue. Immobilizer controls st...

just change the switch, nothing else need
you can see the part number on the picture, it is same for 96-00

It is somehow common problem for 98-99 civics. The ignition switch contacts (see photo: in the white cylinder) have problem sometimes http://i376.photobucket.com/albums/oo208/FISHERHONDA/35130-S04-3053.jpg?t=1356046046 here is the Honda bulletin for this issue http://www.tegger.com/hondafaq/tsb/civi...

OEM Honda ones are the best.
The aftermakert either unsticks from windows frame either add stress on electrical motors

Simply change gasket and you will gain immediately 15hp
viewtopic.php?f=15&t=724&hilit=parts+number

also read if didn't our member ilya topics he is pro in ecu swaps for auto transmissions

Yes, it will work with usdm ecu.
The ecu differences is for emissions regulations and fuel map differences.
In case of manual ecu then it will needed add clutch sensor in eudm car in order to work with usdm ecu.
Since it is auto there is no such problem

What can you find but I think now is selling MTF3,
maybe you found mtf2 from old stock so I say go for mtf3