My Toyota Cressida has about 130K miles, spark plugs were changed about 5 years ago and has less than 20K mlies on them. Recently, When I give gas during acceleration I very strong vibration with pop and around the 40 and 50 mpg it hesitates.
SOURCE: 1989 tOYOTA CRESSIDA sAPRK PLUGS WELLS. OIL IN THE SPARK WELL
The 7MGE has 2 separate valve covers/gaskets with 8 screws holding each cover that will loosen over time.
Find the phillips screws holding on the covers and retighten snugly by hand do not overtighten!
Pull plug boots/wires by the boot not the wire and use paper towels or rags on a long screwdriver etc to absorb the oil from the wells.
Carefully clean plug boots with spray brake cleaner (avoid spraying anything but the boot) and let dry.
Apply 100% silicone grease to inner boot before reinstalling to allow future removal without damage.
If your engine is particularly dirty you may need to remove the covers first and clean all mating surfaces then reinstall.
SOURCE: My 1991 Toyota has acceleration hesitation
check rom the air fiter box there a air hose that goes to engine check if that air duck hose is not crack or broken repair with electric tape if broken or crack if everything goes fine after the repair change that hose or leave it like that with a few layer of tape its a cheap repaIR THANKS PIERRE
SOURCE: 1991 Toyota Pickup with 293,000 miles on it. I
change your sparkplugs same thing happen to me.
SOURCE: toyota rav4 2.0 d4d, hesitates on acceleration
Look at this thread -seems to be a cure for this problem.
http://www.toyotaownersclub.com/forums/index.php?showtopic=87986
Under hood, passenger side, lower engine area, front of oil filter, mounted in engine block
David
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