Bad miss

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Alan river
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Bad miss

Post by Alan river »

I have a 2004 2wd with the 3RW petrol engine. Have a bad miss it’s ok at idle not good as soon as I increase the revs. It is also pulsing through the air cleaner. Have checked vacuum hoses and replace plugs, plug leads and coil packs. Not sure what to do next
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Re: Bad miss

Post by dd6 »

Pulsing through the air cleaner almost sounds like a timing issue?
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pietpetoors
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Re: Bad miss

Post by pietpetoors »

Did the problem appear after you worked on the vehicle or did it just start by itself?
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pietpetoors
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Re: Bad miss

Post by pietpetoors »

What is a 3RW engine?
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Re: Bad miss

Post by Mars »

Or it could be an inlet valve.
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Re: Bad miss

Post by Mud Dog »

I think he means a 3RZ motor.
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Alan river
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Re: Bad miss

Post by Alan river »

Yes I mean 3RZ and it just started while driving around town . Have not been working on at all
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Re: Bad miss

Post by Alan river »

Have had compression test done and was told it is all good
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Re: Bad miss

Post by Mud Dog »

If the compression test was genuinely good, then the chances of a valve problem are slim. Generally these are hardy motors that can take some abuse and don't give many problems.

Without the blow-back and considering what you have already replaced (including the compression test), I would perhaps be thinking along the lines of a dirty / partially blocked injector.

The fact that you are getting some bl;ow-back through the intake is puzzling and as mentioned could be a timing issue, but it would have to be badly out of spec. Then why would the timing go out of it's own. I'm not convinced even though it is a possibility.
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Re: Bad miss

Post by LouisZ »

Check the idle control valve on the throttle body. It become stuck and needs a good cleaning.
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