2nd Gen Dakota Tech 1997 - 2004 Dodge Dakota Tech - The ultimate forum for technical help on the 2nd Gen Dakota.

4.7l misfire in Cyl. #5

  #21  
Old 12-20-2018, 08:54 PM
Lifteddakotasport01
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Originally Posted by Dodgevity View Post
That might be your radiator cap malfunctioning. When the pressure drops in the radiator, a valve in the cap should open and allow reverse flow back into rad. On the topic of HG, try starting the truck cold with the rad cap off. If the coolant becomes turbulent in the neck, or shoots out, you've got a HG issue. You can also rent a block tester to sniff coolant for gases.
It's possible that the radiator cap is malfunctioning but I replaced the original cap with the one from my 02 Dakota which about 100k less miles than this truck.
In reference to the HG, I have run the truck cold with the cap off in the past. The coolant isn't very turbulent, but there are intermittent bubbles that keep rising up. No matter how long I run the truck, the bubbles keep slowly coming.
 
  #22  
Old 12-21-2018, 01:03 AM
Lifteddakotasport01
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Unplugged the O2 sensor above the cat on the side of the misfire, then the one behind the cat. No change. But I did notice something that sounded like a slight exhuast leak from that side. Upon closer inspection, the noise is coming from what seems like the valve cover, near cylinder 5.
 
  #23  
Old 12-21-2018, 09:24 AM
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Wonder if you have a collapsed lifter..... Compression test?
 
  #24  
Old 12-21-2018, 10:23 AM
Lifteddakotasport01
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Originally Posted by HeyYou View Post
Wonder if you have a collapsed lifter..... Compression test?
Oil filter? It's nowhere near cylinder 5. I was unable to compression test due to the spark plug adapter piece being too wide. I could get it in the hole, but absolutely no way to slip a socket over it to screw it in
 

Last edited by Lifteddakotasport01; 12-21-2018 at 10:25 AM.
  #25  
Old 12-21-2018, 11:17 AM
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Not filter, lifter, as in, part of the valve train. Yours is overhead cam though, so, the lifters will actually be under the 'valve covers'.

Get a different adapter. My gauge has a sparkplug-looking end, a short length of rubber hose, and then a quick connector. I just screw the hose in by hand, hook up the gauge, and go.
 

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