[69datsun510]

I have some good injectors, as you know, so you can switch them out. Nobody posted a common cause for uneven idle can be a bad pressure regulator, but I put a new one on for ya, so it's not that. We had to replace the fuel pressure regulator cause the car wouldn't start, it was flooding out from a bad regulator. If its a vacuum leak, use the brake cleaner spray can, solution. Check the brake canister hose as ryguy suggested, it came off easy and seemed old, I had to remove it to put on the pressure regulator. lmk if you get it solved.