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1998 4Runner Misfire 3.4

Discussion in '3rd Gen 4Runners (1996-2002)' started by LandonFox, Dec 4, 2017.

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Dec 4, 2017 at 8:49 PM

#1

#1
LandonFox [OP] New Member

Joined:

Dec 4, 2017

Member:

#5122

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2

Been chasing a mysterious multiple misfire.

replaced:
plugs
wires
coils
injectors
fuel pump and filter were also replaced in the past year

still runs very rough and flashing CEL. codes P0300 P0304 P0306.
any suggestions? I think my next step is compression check or possible fuel pressure regulator?

LandonFox, Dec 4, 2017

#1

Dec 5, 2017 at 4:21 AM

#2

#2
RonT4R New Member

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640

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First Name:

Ron

Virginia Beach

Vehicle:

2007 4runner SR5 4WD

How did the plugs look after you removed them?

RonT4R, Dec 5, 2017

#2

Dec 5, 2017 at 12:56 PM

#3

#3
LandonFox [OP] New Member

Joined:

Dec 4, 2017

Member:

#5122

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The plugs didn't look too bad, normal carbon buildup and normal ware, none looked especially worse than the others. And none were too wet.

LandonFox, Dec 5, 2017

#3

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