blue94sc
Registered User
Recently I have been getting an intermittent CEL light at partial throttle.
I don't get any KOEO or KOER codes but i do get three codes from continuous memory of 181, 185 and 189 stating both banks running lean and the Mass Air Flow lower than expected. I have replaced the fuel pump recently with a Walbro 255lph. I have also replaced the TPS with another one to see if my old one had a dead spot in it. Sometimes it hesitates during the transition between vacuum and boost. And sometimes it falls on it's face when I stomp on it. It used to burn the tires but it lags until aroung 2500 rpms then takes off. I also used to get a little spark knock but that has disappeared. (weird)
This weekend I plan on installing a new fuel pressure regulator and possibly an older style blower pulley and raised top. The center catalytic converter has been gutted and seemed to make a little difference. I am currently in the market for an aftermarket exhaust and plan on a tune as well.
Does anyone have any ideas of where to check?
My vacuum looks good and I have tested the prone areas with no signs of a vacuum leak. Autolite plugs and Taylor wires were in stalled this past winter also.
Stumped..
I don't get any KOEO or KOER codes but i do get three codes from continuous memory of 181, 185 and 189 stating both banks running lean and the Mass Air Flow lower than expected. I have replaced the fuel pump recently with a Walbro 255lph. I have also replaced the TPS with another one to see if my old one had a dead spot in it. Sometimes it hesitates during the transition between vacuum and boost. And sometimes it falls on it's face when I stomp on it. It used to burn the tires but it lags until aroung 2500 rpms then takes off. I also used to get a little spark knock but that has disappeared. (weird)
This weekend I plan on installing a new fuel pressure regulator and possibly an older style blower pulley and raised top. The center catalytic converter has been gutted and seemed to make a little difference. I am currently in the market for an aftermarket exhaust and plan on a tune as well.
Does anyone have any ideas of where to check?
My vacuum looks good and I have tested the prone areas with no signs of a vacuum leak. Autolite plugs and Taylor wires were in stalled this past winter also.
Stumped..