Intermittent bog/stall problems at cruising speeds

[tramp_drift240]

Been a long time since I posted on Nico, especially in the technical section trying to figure out a problem, but currently I have no idea what to check or how to check.

I've got a 1992 SE coupe with an SR swap and whatever whatever. Walbro fuel pump, run of the mill harness splicing for any average SR swap. Over the past few days, I've been having extremely intermittent bogging problems, normally starting when I'm on the highway cruising around 70 or so. Out of nowhere (no sharp turn, bump, or sudden change in operation) the engine dies, almost as if i hit the speed governor, so basically a fuel cut.

Three or four times now it's done this and won't come back by dropping the clutch to "clutch-start" or "push-start", so I'll coast in neutral to the shoulder and stop completely. Also, three or four times now, after messing with fuses (that aren't blown) and moving wires that, as far as I know, are good connections between everything, it still wont start, but will turn over. Then, again randomly, will turn over and actually fire up and stay running. Then it'll die out again after a couple minutes. Intermittent as hell, I know.

The one thing that DOES help to narrow things down, I can tell that the fuel pump isn't priming when it doesn't start. Then randomly it WILL prime and it'll be good to go til it dies again.

All I can think of is some wiring contacts somewhere are going bad, causing a ground or a short, or maybe an existing ground is bad and not staying grounded as it should?

Any feedback or advice, actual in-depth assistance is appreciated. Don't respond with the regular "use the search button" or the other commonly said "check timing, spark etc etc etc"

Pretty sure its fuel pump power related. My cars running fine right now, but I have no way of telling when it'll decide to stop working again, so I can't really go out and start testing connections, since right now everything works. I have to make it stop working again and THEN start testing things to figure out what's deciding to stop working intermittently.

Apologies for the wall of text, I tried to break it up as best as I could for ease of reading. HELP OUT AN OG.

[moso]

sounds like a bad ground, most likely in the engine bay. check the grounds on the head and intake manifold. Chances are the ecu is actually shutting down and its turning off the fuel pump relay.

[tramp_drift240]

ive been seeing some stuff about checking the grounds in the engine bay, and even adding in an extra one and it might solve it. worth a shot.

[compactfean]

I would say the same,.... Ground issue. Also look into the eccs relay., maybe get a new one and if problem persists, than obviously it's not that. I've seen that stupid relay cause havoc when it comes to diagnosing.

[hudy]

Sounds like power/ground issue to me too. Had a similar experience with a friends B18 CRX. The guy who installed it didn't tighten the ECM ground on the back ok the block, was loosing ignition and fuel randomly. Got that ground tightened up and ran great. After that the the transmission lost a mainshaft bearing due to not being filled with oil. He is no longer friends with the installer.