Mechanics

CAN I INSTALL BOSCH MODEL 4428 SPARK PLUGS IN MY TRUCK

1989 Toyota Pickup • 100 miles

I asked this question during a different discussion on the inoperative blower motor switch but I think our discussion got crossed up so I'm asking this again?

I have a new set of Bosch +4 plugs (Model 4428) and wondered if I could put them in this truck. Alldata. Diy says operating temp is 392 @ 10 mph to 1479 @ 80 (I think.) I actually drive around 63 consistently but I'm noticing skipping under load (accelerating). I should buy #4478, but I have these 4428(s) already.

My pickup has the 22R w/ 5-speed drivetrain.
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Jack Davidson
May 31, 2012.



These may be to cold of a heat range or to hot. Withot actually seeing one I can't tell you. You should normally only go 1 heat range below or above what is suggested to prevent engine damage. I wold say no, but I don't know heat ranges of Bosch

Hmac300
May 31, 2012.