94 civic stalling problem

My friend has a 94 civic that what she says feels like it loses power and then dies.

The only thing about it that I know is that it has a new main relay and new plugs.

Any suggestions before I jump in to the ignition and fuel?

Anybody? I'm suppose to go look at it this weekend.

Check for vacuum leaks, check that the IACV is clean and working properly. Does it happen intermittently or consistently?

Unfortunately there isn't a lot of information to go on. Your friend did to you what some of my favorite Service Advisors used to do to me, she gave you a R.O. reading "Customer states car stalls" with no details.

When does it die? At speed? High speed? Low Speed? At idle? Under load? On deceleration?

Can she keep it from dying by giving it throttle or does it shut off like somebody turned the key?

Does it restart immediately?

Does it happen when cold? hot? both?

Does it stall regularly or intermittently?

When were the new parts installed? Why were they installed? Was it to fix the stall or for other reasons?

Are the plugs NGK and the main relay OEM?

Is the car maintained or is a rolling shell of neglect?

Any DTCs?

Does it have an aftermarket remote start or alarm? (I have fixed many stalls and no-starts by removing the 99 buck scotch lock specials)

First you have to duplicate it and go from there. In my experience the Main relay usually causes a crank/no start. If I had to pick something to look at without any information I would pull the cap and see if there is red death. Outside of that, I would need more info.

Idle air control valve. Had it happen in my `97 civic. Super annoying.

Reminds me of my old 1.5 Civic started stalling from a steady speed whenever I pushed the clutch in, usually approaching a stop sign or light. It did this in dry weather plenty of times so humidity/moisture in the air played no role (unlike an old Ford I use to have). At first it started up right away so although it was still a concern, I at least could get from A to B without too much worry. In my sad attempt at trouble shooting, I replaced spark plugs, wires, cap/rotor, air filter, and finally the IACV. After all that the stalling continued under the same exact conditions, except it would no longer re-start after it died. Even with a new alternator and battery. That was the end of the line for Phantom 309.

Maybe it was a fuel delivery issue however initial start-up and acceleration was always normal.