idle/fuel?? problem
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Junior User
Joined: Aug 2012
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From: Kingsville, TX
idle/fuel?? problem
been having some troubles with my 94 f150 5.0 its been running real ruff at i replaced the iac it started to run better but has acceleration and occasional miss. i ran some codes and came back with this 172(runnning lean) 538(insufficiant rpm change) 632 (overdrive cancel switch)
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Joined: Mar 2004
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Your fuel pressure should be between 30 - 34 lbs at idle.
Speaking from experience, the first place I would check when dealing with drivability problems, especially low RPM problems, would be looking for a vacuum leaks on the plastic vacuum lines coming from the vacuum tree on the intake. The leak can cause a lean code, that or thermactor tubes (on the back of the heads on a V8) being rusted out.
Speaking from experience, the first place I would check when dealing with drivability problems, especially low RPM problems, would be looking for a vacuum leaks on the plastic vacuum lines coming from the vacuum tree on the intake. The leak can cause a lean code, that or thermactor tubes (on the back of the heads on a V8) being rusted out.
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