Oxygen Sensor??

FORD MUSTANG
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RONSMUSTANG
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I have a 1990 Mustang 5.0 with about 75,000 miles on it.

When I start it, it won't continue to run unless I play with the accelerator. then after it's warmed up a bit it runs, but roughly. It also sometimes pops like a carburator on acceleration.

Codes 91 and 41 on bank 2 come up on an analysis. I am guessing an oxygen sensor?

Ron

I did donate through paypal. Hope you got it!
Apr 24, 2007 at 11:43 AM
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2CARPRO JACK
  • ✓Experienced Mechanic
  • 11,533 POSTS
Yes, those are both o2 sensor codes. If there arent any mechanical problems with the engine, I would start there
Apr 25, 2007 at 12:51 AM
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SERVICE WRITER
  • ✓Experienced Mechanic
  • 9,123 POSTS
For what it matters, I ran through to trouble tree on it, not that is always the answer to a problem :roll:

But it starts with checking the fuel pressure to make sure it's in spec. and holds for 60 seconds with key on engine off. I think the spec is 35-45 psi?, but don't recall.
Apr 25, 2007 at 2:29 PM
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