Okay so I recently threw in a JDM Z6 into my 93 Sol. Everything's been going great until recently. My car seems to have some issues when under a load. Accelerations under 2500 rpms feels like the car is bogging or misfiring. After it passes, it runs pretty smooth. I noticed oil leaking underneath the dizzy so I replaced gaskets, O-rings and replaced the cap and rotor because I saw oil resin that had seeped into the cap. After installing I ran it for a few miles only to see the leak still occurs.

A few options come to play
Is it possible I need to re-torque my cylinder head bolts?
Fuel pump going out? I replaced Fuel pressure regulator
MAP sensor? I cleaned out the entire throttle body
Check fuel injectors? I wiped off some black crap but maybe I should try gumout. Any other suggestion would be great!

 

Try cleaning out your IACV.

Did you install the gaskets, and o ring correctly? Did you apply any type of sealant to them? If not, that's your problem

 

Oil leak under dizzy=leaking distributor o-ring.
Check mechanical timing with a timing light.

 

This has nothing to do with his problem. Stop shotgunning.

He already changed the O-Ring.

If it's still bad, either he used the wrong size O-Ring, or the shaft/bearing is going bad and he needs a new housing.

OP, the things you mentioned:
Cylinder head bolts. Did you touch them at all? And no, you would not retorque them. There would be a much bigger problem if the head was not properly torqued.
The others are possibles, but I'd troubleshoot ignition first. Start with the easy/free stuff

When is the last time you've changed your spark plugs and wires?

You said you changed out the cap and rotor already. That only leaves the ICM/Ignition Coil, plugs and wires.

You can buy a spark tester and test the spark to make sure it is good.

How do your plugs look?

 

Question would be, why would you need to re-torque them. If you touched it, meaning replaced the headgasket, than the head should've been checked for warpage.

 

I asked because he didn't explicitly state "distributor o-ring"

Better to re-iterate than go on a wild goose chase only to find he hadn't replaced the gasket.

 

Internal distributor shaft seal is likely worn. Tear down distributor, inspect shaft where the oil seal seats, if the groove catches a fingernail, you likely would only slow down the oil leak with a new seal, if its smooth, install a new seal, close that bitch up and run it. Keep an eye on it for a while to ensure the seal does it's job.

 

So for starters, a "JDM Z6" you say, eh? Considering the Z6 was used in the American and European markets, whoever told you it was a "JDM" engine lied to you.

Check your spark, tell us what color it is on all four plugs.