tachometer
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Mountain Pass
Joined: Dec 2007
Posts: 124
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tachometer
Hey guys,
When i turn my key on, engine not running, the tach goes straight to 3500 rpm. Then when i crank up it stays at 3500 rpm. Of course the engine isn't turning that fast it's just the tach reads 3500. What's the problem? I'm also getting code 172 (always lean). I just replaced the 02 sensor two weeks ago. egr is stock. Could it be stuck open to cause this always lean code.
91 f150 126,000 miles
When i turn my key on, engine not running, the tach goes straight to 3500 rpm. Then when i crank up it stays at 3500 rpm. Of course the engine isn't turning that fast it's just the tach reads 3500. What's the problem? I'm also getting code 172 (always lean). I just replaced the 02 sensor two weeks ago. egr is stock. Could it be stuck open to cause this always lean code.
91 f150 126,000 miles
