Welcome Visitor! Please take a few seconds and strat37
New Member
- Joined
- Jun 1, 2008
- Messages
- 2
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1994
- Make / Model
- Ranger
- Transmission
- Automatic
Hello
The truck was running fine, went to the store, started it up. Rough idle to the point of stalling and blowing black smoke (raw fuel). The CEL would come on and off. When I got home I let it sit for a while cleaned the MAF, started it and let it idle, eventually it stalled again. I started it again and when it started to rough idle I pulled the MAF connection, from then on it runs fine. I pulled the codes KOEO, received 157, 158 (due to unplugging the MAF). I also got code 159 (Mass Air flow sensor fault). I also tested the electrical connection (terminals A,B,C and D), results for these were A&B= 14.42, C=5.93 and D=.18.
As I stated the truck runs fine with the MAF unplugged, so from the readings of the code and the disconnecting of the MAF, it tells me that the MAF is bad. I forgot to mention that when I plugged the MAF back in, the engine started to rough idle and blow black smoke again. Any feedback or thoughts are appreciated. One last thing, is it safe to run the truck with the MAF disconnected? From what I understand it will set itself to default for the fuel mixture but run lean.
Thanks
The truck was running fine, went to the store, started it up. Rough idle to the point of stalling and blowing black smoke (raw fuel). The CEL would come on and off. When I got home I let it sit for a while cleaned the MAF, started it and let it idle, eventually it stalled again. I started it again and when it started to rough idle I pulled the MAF connection, from then on it runs fine. I pulled the codes KOEO, received 157, 158 (due to unplugging the MAF). I also got code 159 (Mass Air flow sensor fault). I also tested the electrical connection (terminals A,B,C and D), results for these were A&B= 14.42, C=5.93 and D=.18.
As I stated the truck runs fine with the MAF unplugged, so from the readings of the code and the disconnecting of the MAF, it tells me that the MAF is bad. I forgot to mention that when I plugged the MAF back in, the engine started to rough idle and blow black smoke again. Any feedback or thoughts are appreciated. One last thing, is it safe to run the truck with the MAF disconnected? From what I understand it will set itself to default for the fuel mixture but run lean.
Thanks
