about 1.5 moth ago i put in some bosh platum pluges the 2 prong ones it runes fine but recently i only seem to get 15 mpg and i was getting about 19-20 i dont understand why now its dropping off be for these i was running auto lights i got better mpg any ideas whats wrong
BAIN15
May be you purchased oxygenating winter gas.This might make you loose one or two mpg but not as much as you are loosing. Could be you knocked off a vacuum line or crimped a spark plug wire. Make sure all plugs are firing. Good luck.
Do you live in a cold climate? It's not unusual for mileage to drop by 4 or 5 mpg during the winter.
Qdan baker wrote:
Your reduction in mileage could be due to many factors as others have posted. My first thought would be the bosh plugs. Bosh plugs are junk. They can and will cause all sorts of driveability problems. I would replace the bosh plugs with some NGK or DENSO plugs and see if that helps.
Agree on the Botched (Bosch) plugs --- Toyotas just don't like them. Go back to NGK/Nippondenso. Install them with antiseize.
ok ty for your help ill let u know wht happends and i an northern cal
530 are i run 87 in itBAIN15
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