Hi,
My '87 GN has been fine this summer but it started cutting out / sputtering for a minute when I was getting back to work one day. It's been fine for several short runs but the cutting out is back and getting worse / more consistent. I took a short powerlogger file with it just idling, and another one with idling then a short easy drive where it sputtered a bit. When on the gauges screen in PL, the cutting out makes the gauges jump around for a split second, which would lean toward an electrical issue right? If my Walbro 340 fuel pump was dying for example, I doubt most of the gauges would jump around when a fuel component cuts out. When the car is acting up, any load on it seems to make it occur. If I just idle along it's okay but when you need to speed up it makes it worse. And it wasn't doing it at idle at all but I believe it's starting to now.
From what I know, the readings from PL look normal at idle, other than when it goes closed loop I expected it to stay there. At idle closed loop would uncheck, and if I rev up to 1500 rpm or so closed loop would return and BLM learning would start. The car has low miles on the fuel system upgrades, plugs, Turbo Tune chip, battery is maybe 3 years old, new stage I tranny from last summer. Plug wires aren't super fresh but maybe 10k miles on them. PL files are attached. No trouble codes listed on that screen, no 'svc engine soon' checked off. Any help would be greatly appreciated!
My '87 GN has been fine this summer but it started cutting out / sputtering for a minute when I was getting back to work one day. It's been fine for several short runs but the cutting out is back and getting worse / more consistent. I took a short powerlogger file with it just idling, and another one with idling then a short easy drive where it sputtered a bit. When on the gauges screen in PL, the cutting out makes the gauges jump around for a split second, which would lean toward an electrical issue right? If my Walbro 340 fuel pump was dying for example, I doubt most of the gauges would jump around when a fuel component cuts out. When the car is acting up, any load on it seems to make it occur. If I just idle along it's okay but when you need to speed up it makes it worse. And it wasn't doing it at idle at all but I believe it's starting to now.
From what I know, the readings from PL look normal at idle, other than when it goes closed loop I expected it to stay there. At idle closed loop would uncheck, and if I rev up to 1500 rpm or so closed loop would return and BLM learning would start. The car has low miles on the fuel system upgrades, plugs, Turbo Tune chip, battery is maybe 3 years old, new stage I tranny from last summer. Plug wires aren't super fresh but maybe 10k miles on them. PL files are attached. No trouble codes listed on that screen, no 'svc engine soon' checked off. Any help would be greatly appreciated!
