I've had the HillbillySUV sidelined for a few months, although I have used it around my property, started it every couple of weeks to run for a few minutes.
Yesterday was the first time I'd driven very far in months. I noticed right away it wasn't running as it should, but chocked it up to old fuel and sitting too long.
Even with fresh fuel it continued to run worse, eventually stalling out multiple times as I pulled up to a stop light.
By the time I got home it was surging pretty noticeably and had a bit of a miss. Also it smelled as if it were running too rich. My first thought was that I the one of the stock O2 sensors had crapped out. On a whim I thought I'd unplug the injectors one by one to see if that made a difference.
To make a long story short, the thing idles better with all 4 injectors on the drivers side unplugged. Removing the vacuum line from the fuel pressure regulator and it doesn't seem to make any difference.
After turning the engine off for a few minutes I still have pressure at the test port so I don't have an injector stuck open.
I ran the codes and it came up with a bunch of emmissions codes (stripped off the engine years ago). The lone stand out was a 42 indicating a rich condition at the O2 sensors. (duh)
I'm left wondering if the O2 sensors are shot, or if the rich condition is the result of something like a bad fuel pressure regulator feeding too much pressure to the injectors.
Any ideas?
Yesterday was the first time I'd driven very far in months. I noticed right away it wasn't running as it should, but chocked it up to old fuel and sitting too long.
Even with fresh fuel it continued to run worse, eventually stalling out multiple times as I pulled up to a stop light.
By the time I got home it was surging pretty noticeably and had a bit of a miss. Also it smelled as if it were running too rich. My first thought was that I the one of the stock O2 sensors had crapped out. On a whim I thought I'd unplug the injectors one by one to see if that made a difference.
To make a long story short, the thing idles better with all 4 injectors on the drivers side unplugged. Removing the vacuum line from the fuel pressure regulator and it doesn't seem to make any difference.
After turning the engine off for a few minutes I still have pressure at the test port so I don't have an injector stuck open.
I ran the codes and it came up with a bunch of emmissions codes (stripped off the engine years ago). The lone stand out was a 42 indicating a rich condition at the O2 sensors. (duh)
I'm left wondering if the O2 sensors are shot, or if the rich condition is the result of something like a bad fuel pressure regulator feeding too much pressure to the injectors.
Any ideas?
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