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Can I install Bosch Model 4428 spark plugs in my truck

Tiny
JACK DAVIDSON
  • MEMBER
  • 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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Thursday, May 31st, 2012 AT 12:14 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
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
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Thursday, May 31st, 2012 AT 1:14 PM

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