Hey
I have a 1995 Integra GS-R with a hybrid motor
B18C1 - ARP Rod Bolts, CTR Pistons, Balanced, B18C Rods and Crank
B16A1 - Full ITR Internals (Valves, Springs, Cams, ect) Milled .03
B&M Oil Cooler and Filter Relocate

Car was in good running order, burnt 1 qt every 500 miles
Driving it to a resturant, and was driving nice, only hit vtec twice whole drive.
When i pulled into the parking lot, car made a loud noise (hard to describe), and began to run incredible rough (rattling, banging, ect), and lost oil pressure (dummy light came on). So i shut her off and let her coast for 10 sec or so.
Once i started her back up, oil pressure came back up, but she wouldn't idle. She was bouncing from 1000rpm to 2300rpm. In gear, even with proper pedal modulation, i still con't keep it from stuttering at low rpms in all gears.
I limped her back home, and proceded to check over the engine more throughly than in the parking lot. All vaccum line good, Fuel press good, Compression good (285, 290, 275, 285), Oil full, Coolant full, alt plug in, and belt tight, timing tension felt good.

Any ideas? If you need more info please post here and i will respond asap.
Thanks in advance

 

Check out the oil pump.

 

FYI:

New problem began once she got home. Would not get spark. Code 15 (Ignition Output Signal)
3 parts to problem
1. Somehow my ignition output wire harness (Green plug on back of fusebox) came unclipped
2. Engine harness carrying ign out signal was loose

3. PCV hose blew off, causing rough idle due to vaccum leak