Oldest known version of this page was edited on 2008-05-30 15:33:45 by HowWhat []
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Diagnosis and Part Selection Advice:
How did you know this part needed replacement? Why did you choose a certain brand/part number?
On this buick regalGS 3.8supercharged (2000) this symptom has occurred once before at about 75K miles, now 100K miles. Symptom is a consistent "fuel starvation" miss with no OBDII or serviceenginesoon code. It is enough of a safety problem that it has to be dealt with instead of waiting for a code to show. The miss occurs under light to moderate load and gets worse with time. It is not as bad as a crank sensor miss, which feels about the same, but will stop the vehicle "dead." Have had the crank sensor miss, intermittently stopping the engine dead 3 times over about a 6 week period with no code shown except "#2 cylinder miss." Plug on #2 was cracked and replaced, but crank sensor OBD code never showed up using scanner at local auto parts store. (Maybe a more expensive professional scanner would have pulled all the codes, don't know). Anyway, the "fuel starvation" miss can be easily fixed with a new or reman mass air flow sensor (2 screws and a 4-wire plug) located after air-cleaner elbow. No need to wait for a code pull. New better than reman.
Part Comments
What came in the box? Were additional nuts, bolts, sealant, etc. needed for the repair?
Easy - no sealant needed.
Repair / Installation tips:
Special tools needed? Have to remove other parts to reach this one? Any left-hand threads, sharp edges, messy fluids or other pitfalls to avoid?
I ground 2 screw slots with a dremel tool and cutting wheel instead of looking for a tamper-proof torx bit. Used these same screws to reassemble. Remove old sensor with plug attached first, then unlock plug. Clean all contacts with electrical contact cleaner. REMAN PART only lasted 25K miles, so this time ordered a new AC Delco maf sensor from
RockAuto.
