engine replacement
 

my gf has a 91 hatch and it started to knock this past weekend. i just found a motor online out 0f a 94 auto. will it hook up to her 91 auto? if so what else do i need?

Yes it will work. I'm assuming the new engine is a D15B7, that's what I put in my '91. The simplest thing to do is to put the DPFI intake on the new engine, true MPFI is better but on a daily driver stay DPFI and then you don't have to rewire the ECU, etc.

There are slight differences in the cooling system. The radiator hoses will need to be contorted and cut a little. Putting the DPFI on, you will end up with an extra little hose port on the pipe behind the engine, it needs to be stopped up. The switch that turns on the radiator fan is in a different place (the thermostat housing instead of the back of the block). You'll need to run the 2 wires from the old sensor location over to the thermostat housing.

You will need to swap the brackets for the motor mounts off of the engine. The top one requires removing the timing cover. Of course put a new timing belt, water pump, etc. on the new engine before installing it.

If there's any difference in the flywheel mating with the transmission, take the flywheel off of the bad engine and put it on the new one. I know the housing of the transmission will mate with the engine no problem. The only difference between manual and auto is the flywheel, which simply bolts on (a lot of times when buying a used engine it won't include the flywheel). The engine block is exactly the same either way.

i got the trans off my d16 blown block bolted it up to block i got from used auto. and just realized the different pressure plate on the auto how do i swap the two

Take out the 6 bolts holding the flex plate to the crankshaft. They look like funky bolt heads, but they are designed to be turned with an ordinary 12-point 17 mm socket. Swap over the bolts and plate from your original engine. If the "new" engine was used in a manual, take the pilot bearing out of the end of the crankshaft as well.

I'm sure it'd be better and a whole lot easier to just find the same type motor for your car. Swapping a motor from a different generation takes a little more effort and will probably cost a good bit more.

Thanks I got it figured out I wrote that post before I attempted the obviouse.. now I got the new (used) engine in starts up no problem but when I punch the throttle the auto trans doesn't shift and its like I'm hitting some sort of rev limiter at 3500rpm??? What could that be ????

Is the timing set properly? Are there any codes in the ECU?