spirograph
New Member
- Joined
- Sep 23, 2015
- Messages
- 10
- Reaction score
- 1
- Points
- 3
- Vehicle Year
- 1993
- Make / Model
- Ford
- Transmission
- Manual
Edit: Just took the OBD-1 codes.
KOEO readings were:
157 - (R,M) Mass Air Flow signal is/was low or grounded - MAF [Understandable, had the MAFS disconnected to get it started]
543 - (O) Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits
KOER readings were:
173 - (R,M) Oxygen sensor not switching - system is or was rich - Single, Right or Rear HO2S - Fuel control
(R) Oxygen sensor not switching/system rich Left or Front HO2S - Fuel control
Halp.
___
Hi guys,
First post (translation: I am suuuuuuper stumped.):
I've got a 1993 Ranger with 95k miles on her (thank god for retirees), and over the last month she's become harder and harder to keep running upon starting. The engine turns over OK and fires, but unless I'm riding the gas for the first ten seconds or so (and it's become worse over time, taking more and more to keep it running - at this stage I'm all the way to the floor and it'll still die on occasion), the engine slips into the 100s on the tach, burbles, and dies. If I can keep it going for more than about ten seconds, it idles just fine and is totally driveable.
So for attempted solutions I have:
-Cleaned the old IAC, and then replaced it outright
-Checked the intake for obstructions
-Blasted the MAFS with the appropriate cleaner
-Swapped in a new fuel filter
I have a coolant temp sensor that I'm going to put in as soon as I can find a 25mm crescent wrench (anyone in Seattle wanna let me borrow one? ), but I don't think that's it; disconnecting the MAFS entirely has it starting and running perfectly fine (although at that nice high idle). Thoughts? I'm down to bad MAFS or vacuum leak, but I'm honestly a little intimidated by the prospect of tracking that one down.
(Disclaimers: I don't think it's related, but I need to replace the valve cover gaskets; driver side cylinder closest to the firewall is leaking.)
KOEO readings were:
157 - (R,M) Mass Air Flow signal is/was low or grounded - MAF [Understandable, had the MAFS disconnected to get it started]
543 - (O) Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits
KOER readings were:
173 - (R,M) Oxygen sensor not switching - system is or was rich - Single, Right or Rear HO2S - Fuel control
(R) Oxygen sensor not switching/system rich Left or Front HO2S - Fuel control
Halp.
___
Hi guys,
First post (translation: I am suuuuuuper stumped.):
I've got a 1993 Ranger with 95k miles on her (thank god for retirees), and over the last month she's become harder and harder to keep running upon starting. The engine turns over OK and fires, but unless I'm riding the gas for the first ten seconds or so (and it's become worse over time, taking more and more to keep it running - at this stage I'm all the way to the floor and it'll still die on occasion), the engine slips into the 100s on the tach, burbles, and dies. If I can keep it going for more than about ten seconds, it idles just fine and is totally driveable.
So for attempted solutions I have:
-Cleaned the old IAC, and then replaced it outright
-Checked the intake for obstructions
-Blasted the MAFS with the appropriate cleaner
-Swapped in a new fuel filter
I have a coolant temp sensor that I'm going to put in as soon as I can find a 25mm crescent wrench (anyone in Seattle wanna let me borrow one? ), but I don't think that's it; disconnecting the MAFS entirely has it starting and running perfectly fine (although at that nice high idle). Thoughts? I'm down to bad MAFS or vacuum leak, but I'm honestly a little intimidated by the prospect of tracking that one down.
(Disclaimers: I don't think it's related, but I need to replace the valve cover gaskets; driver side cylinder closest to the firewall is leaking.)
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