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what do cyl 1 2 4 have in common They show a mifire on the scantool 99 odyssey v6

Customer (name blocked for privacy)

Status: Closed Value: $15

Hi,

They do not share anything directly. Multiple misfire is generally a sign of needing a tune up. On your vehicle, it has individual coils over plugs. A tune-up woulb be the plugs, coil tubes that connect coil to plug, and possibly the coils themselves. IF you suspect coil problem and not tune-up, swap your cols and see if mis-fire travels with them. If they do, then you need to replace the three coils. If not, do the tune-up.

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Ive already swappped ncoils Ive cleared the codes and after a redstart the same codes return p0301 2 4 I removed the plugs and they appear to be fine they are not fuel laden they are dry. The only commonality I see is they are the first three cyl in the firing order- I wonder if thats tells you anything

Hi,

What condition were the coil tubes in? Also, at idle is there any noticable mis-fire?

Yes there ios amisfire at idle I have not begun a total physical check to see if I can determin if the injector are clicking or if there is power at he coils. If I close your website can I get back to you with out haveing to register all over again. Or should I leave your wqebsite open for now

yes, this question will remain open for 24 hours.

IF you have voltmeter check for 12v at the coils, also with a noid light check for injector pulse.

Keep me apprised of your findings

Hi,

Another Honda tech brought up a couple of good points.

Did the timing belt ever break - you could have some bent valves.

The EGR port could be clogged, common problem, and althoug it usually sets an EGR code, it can cause misfires and rough running. The port has to be drilled out and a tube installed.

I dont have a noid lite so I used a length of rubber tubing and stuck it on the injectors all 6 seem to be working. Is that sufficient or do I have to go get a noid lite

the timing belt is original and is in god shape tho probably ready for a new one. the coils all have 12 volts but while running I disconnected one at a time so I will see if the coil or tube or plugs is any good. Get back to you soon. cyl #4 was the only coil I got no reaction from.

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