Probably
The 1986 Honda prelude 2.0 Si has a A20a3.
A 1994 Honda Prelude S would not have a VTEC engine in it (assuming it has the original engine in it). It should have the F22A1 in it which is SOHC and Non-VTEC.
possibly
Yes, All H and F series engines are interchangeable.
You could, but because the '94 Prelude is heavier than the '89 Prelude, it doesn't make sense to swap in a smaller powered motor.
Yes. The H22a and H23a motors can interchange transmissions.
Have the car taken to Authorised Repairer for the Honda Cars. They can find out what has happened to the engine.
How can I check the ENGINE COOLANT TEMPERATURE (ECT) sensor on my 1991 HONDA PRELUDE SI 2.1L
The starter on the 1989 Honda Prelude is located on the left side of the engine. It is under the radiator hose that is at the rear of the radiator.
The horn on a 1987 Honda Prelude is located behind the front bumper of the vehicle. It is mounted in front of the engine block.
Yes Honda made a Prelude in 1995 with a DOHC VTEC engine. VTECH makes cordless phones and toys.
H22A Honda engine it ready for a turbo