hmm lets see
you really need to specify, in regard to engines
because certain engines have problems that others dont

i am only well versed on 4th gen ludes
because i have owned 3 in the last 10 months
The power steering rack has a TSB (bad spool valve) on it for 92-93 Si, i believe problem was corrected by 94.
The S uses the f22a1 (aka the Accord Lx engine)
The Si uses the h23a1 (the least powerful H series engine)
The VTEC uses the h22a1 (hondas SCCA breadwinner)

[EDIT]
FEATURE!
f22a1 is prone to being uncontrollably slow
[EDIT]

h23a1 is prone to failure on #2 connecting rod bearing (around 150K)

h22a1 has FRM cylinder walls which tend to burn oil (if the car is not taken car of properly (oil change) and simultaneously beaten on)

the interior (especially dash and moonroof) are prone to rattle (age)

the clutch pedal is prone to creaking when car is cold, (age)

h22a1 clutch can go pretty fast if you cant drive it right (mine has 35k, and i beat the piss outta it, aint slippin yet)

h22a1 / 4 timing belt auto-tensioner has a TSB and can fail if not filled with oil correctly (or age sets in)

h23a1 and h22a1 have a knock sensor that seems to break after 100k sometime, (ive changed 2 so far on 2 of my cars)

all 4th gen doors seals, sometimes the glue lets go and its time to break out the GE silicone II and re-seal the rubber lip in the door frame


thats all for now, theres more but thats off the top of my head

also, the h22a1 is a VERY strong engine...
put it this way - TONIGHT, coincidentally i missed 4th gear and hit 2nd gear instead...i was at about 95MPH topping out 3rd gear when this happened and i saw the tach go to somewhere around the 0 Mph mark on the speedo

all you 4th gen lude owners check out what i mean and you will see that is at least 10K RPM.
:jawdrop:

engine is running fine, btw thats the only time that has ever happened to me, but i did almost faint.

that is all
~boomer