Thedriftbadger
05-27-2015, 12:12 PM
Didn't think id need to post on here but im running out of ideas. Just a simple n/a ka in a 93. Everything stock. What its doing is lean popping like crazy any time i give it throttle. It will pop and spit a few times then hesitate, then slowly gain power again until around 3800rpm when it falls flat on its face. Im getting a speed sensor, injector leak, and knock sensor code. Its not a California car so i have no clue why im getting that injector code, especially since none of them are even leaking. Speed sensor isnt hooked up but that shouldn't affect anything, it was fine without it for a long time. The knock sensor code i have fixed before by installing a new sensor but now its back. Sensor looks fine. It did the same thing falling on its face around 4k then was fine after i changed it. Now that problem is back along with the other problem a stated.
What I've done so far:
New maf, no change.
New tps set according to fsm, no change.
Reset ign timing to 20btdc with tps unplugged, no change.
Cleaned throttle body, iacv, maf. No change.
New ecu, no change.
The engine has maybe 7000 miles on it since it was rebuilt. And was fine until about two months ago.
The last thins i can think of is the mechanical timing having jumped. But with only 7000 miles and no chain noise why would that even happen? Or my fuel pump or wiring to the pump is dying, leaving me with low fuel pressure which would result in a lean condition which could lead to detonation. Its a walbro 255 that was keeping up fine with the old ka-t that was in the car.
Im open to suggestions. Thanks.
What I've done so far:
New maf, no change.
New tps set according to fsm, no change.
Reset ign timing to 20btdc with tps unplugged, no change.
Cleaned throttle body, iacv, maf. No change.
New ecu, no change.
The engine has maybe 7000 miles on it since it was rebuilt. And was fine until about two months ago.
The last thins i can think of is the mechanical timing having jumped. But with only 7000 miles and no chain noise why would that even happen? Or my fuel pump or wiring to the pump is dying, leaving me with low fuel pressure which would result in a lean condition which could lead to detonation. Its a walbro 255 that was keeping up fine with the old ka-t that was in the car.
Im open to suggestions. Thanks.