Sudden Leaning Out.

[JOLTY TacoMan]

So installed 1000cc injectors, tuned the global and dead time, all was good for about two weeks. Then suddenly anytime I used anything that used electric power it would lean way out. Now about 2 weeks after that I cant apply any load to the engine without it leaning out completely. Can't even drive it down the street. Someone suggested alternator so I replaced it and no change.

 

[Kokomoguy30]

Have you checked your fuel pump? Also what happens to your battrry voltage when you use anything electric?

 

[benstian]

Does your car feel like it is lean also? If it feels normal, but only WB shows lean it can be your o2 sensor that is broken.

 

[CleverDSMusername]

Does your car feel like it is lean also? If it feels normal, but only WB shows lean it can be your o2 sensor that is broken.

+1 on what benstian said.

be sure to check the wiring too, naked wires could ground out to the chassis & other metal parts or jump electricity to other naked wires, making them "crossed" each time it happens.

 

[Lou98GSX]

my car started doing that when i went from 264 cams to 264 272 . what happend was the idle got lower and caused this condition. i noticed anytime i put a load on the engine the wide band would show lean for a second then go back up . what i did to make it a little better was to raise the idle to 1000 rpm