Misfiring on all cylinders

2004 HONDA ODYSSEY
140,000 MILES • 3.5L • 6 CYL • 4WD • AUTOMATIC
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JVREPAIR
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Hey hows it going? a bout a week ago this van started with a misfire in all cylinders. Some people say that it could be the EGR valve. Some other people say i need to adjust the valve. Other say that the intake could be clogged. So knowing that you guys have more experience i was wondering if you guys could shoot me some tips on what the problem could be? Thanks, John
Nov 18, 2016 at 5:39 PM
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HMAC300
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misfires are very hard to diagnose and cheapest option is to have amechanic fix it because it can be any sensor, injector or basic engine problem. you can start by checking for a vacuum leak, fuel pressure , and scanning for codes. auto parts rent gauge see link. also, check compression.and clean EGR and passages.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Nov 19, 2016 at 6:55 AM