1990 Burban w/ issues
April 18th, 2010, 7:44 AM
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1990 Burban w/ issues
1. Takes about 10 secs to crank then hi idle
2. Once warm it runs fine and cranks up immediately
3. after ~50 miles of driving Check Engine light on
4. once stopped at red light, miss idle but not overly rough idle...
Question: Would a badd O2 sensor be a possible suspect? Its never been replaced.
5.7L TBI
215K miles
2. Once warm it runs fine and cranks up immediately
3. after ~50 miles of driving Check Engine light on
4. once stopped at red light, miss idle but not overly rough idle...
Question: Would a badd O2 sensor be a possible suspect? Its never been replaced.
5.7L TBI
215K miles
April 18th, 2010, 9:29 AM
#2
it could. i suspect bad/dirty idle air control valve as well, possibly dirty egr. timing could be off. vacuum leak(s) how long since cap/rotor/plugs/wires/filters been changed?
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