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Balder
New User
Jul 9, 2020, 1:51 AM
Post #1 of 4
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Misfire cylinder 4
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Hello. I have a Toyota Rav4. 2002-2003 model 2.0L petrol. 230000km (142000miles) According to my newly bought bluetooth diagnostic tool the car misfire on cylinder 4. The symptoms are: -Hesitation when accelerating, particularly uphill. -It's worse when engine is warm. -Worse with ac on. -Worse after a hot restart. -Fluctuating idle when warm. -High rpm idle when coldstart, othervise seem to run mostly fine when cold. Not sure this last point has any to do with anything. I have tried to switch around; -spark plugs -ignition coils -Injectors This didn't change anything except I found that the ohm on injector number 4 was (0.3-4) higher than the others. But switching them up didn't make a difference on the diagnistic tool, or from what I could observe from the engine. Any suggestion on how to proceed?
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Hammer Time
Ultimate Carjunky
/ Moderator
Jul 9, 2020, 5:11 PM
Post #2 of 4
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Re: Misfire cylinder 4
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What do you mean by "didn't change anything"? Did you clear the codes and see if they set to a different cylinder? Did you do a compression test? ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jul 10, 2020, 3:37 AM
Post #3 of 4
(1349 views)
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Re: Misfire cylinder 4
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Exactly? Did "misfire" move to another cylinder? If not go for testing that one's compression vs another or the whole test. Gasoline (so it's called-ha) has lousy power for "warmer/hot" weather vs cold just density of air brings out the weak items first. Hunch: Restricted exhaust or low fuel pressure for this just keep those in mind till you get it, T
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Balder
New User
Jul 11, 2020, 11:08 AM
Post #4 of 4
(1317 views)
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Re: Misfire cylinder 4
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Thank you both for answers. Yes I have cleared the codes, still misfire on 4. After switching around injectors the gasket and o-rings needs replacement so i will wait with a compression test until I get those new. I will update when I know more.
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