Enjoy 5% OFF at VEVOR Canada! and Support Canadian Poncho at the Same Time!
Members Login
Username 
 
Password 
    Remember Me  
Canadian Poncho Homepage -> Canadian Poncho -> Beaumont Power Train Tech Forum -> Spark plug fouling
Post Info TOPIC: Spark plug fouling
zak404


Addicted!

Status: Offline
Posts: 104
Date:
Spark plug fouling
Permalink  

Doing my compression test this winter,pulled all the plugs and number 5 is fouled really bad.  Ido a compression test and compression is actually 20 pds higher than the last time I tested. None of the other cylinders changed. Could this be a stuck valve?



__________________
Prefectca


Poncho Master!

Status: Offline
Posts: 1758
Date:
Sperk plug fouling
Permalink  

The higher compression is probably carbon build up from oil burning. Whats the history on the engine?

Paul

__________________
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
zak404


Addicted!

Status: Offline
Posts: 104
Date:
RE: Spark plug fouling
Permalink  

It was back firing awhile ago due to a vacuum leak and it was doing it on that engine side, it has about 50000 miles on engine.

__________________
oshawacliff


Poncho Master!

Status: Offline
Posts: 2252
Date:
Permalink  

Seafoam candidate?



__________________

Cliff

Done Hurryin

Like the larger type for my eyes. 

 

 
Prefectca


Poncho Master!

Status: Offline
Posts: 1758
Date:
Permalink  

How is your pcv routed? Could the pcv system be allowing oil to be drawn into the intake manifold and burned by #5 cylinder? I cant say for sure why #5 is burning oil, but I have seen oil from the lifter valley sucked l past the intake gasket. Usually caused by having the cylinder heads planed affecting the alignment of the intake and heads. Could be a valve guide or valve seal problem or a broken or sticking piston ring. If the engine works good other than the plug fouling it wouldnt hurt to try something like sea foam as Cliff suggested to try and clean the carbon out and maybe free up a sticking piston ring.

 



-- Edited by Prefectca on Friday 18th of November 2022 09:36:42 PM

__________________
zak404


Addicted!

Status: Offline
Posts: 104
Date:
Permalink  

Ok thanks that may help as I recently moved the PVC valve to that side of the engine. I will switch it back to the other side and see if it makes a difference. I take seafoam is something you pour through the carb to clean it out? The heads are only about 3 years old with maybe 3000 miles on them, Edelbrock street performer heads.

__________________
Prefectca


Poncho Master!

Status: Offline
Posts: 1758
Date:
Permalink  

I personally havent used sea foam but it has good reviews. Perhaps if you do a search on this forum you may find some information. Sea foam is available at Canadian Tire.

https://www.canadiantire.ca/en/pdp/sea-foam-motor-treatment-473-ml-0387800p.html?gbraid=0AAAAADojZpiSVD3uogh72zC-HzBdnJZxT&gclid=EAIaIQobChMInpzD46m5-wIVG_LjBx3kQQGDEAQYASABEgI7jfD_BwE&gclsrc=aw.ds#store=417



__________________
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
Nov 18 to Dec 2 Black Friday UP TO 50% OFF Plus Huge Coupons
4SPEED427


A Poncho Legend!

Status: Offline
Posts: 50202
Date:
Permalink  

zak404 wrote:

Ok thanks that may help as I recently moved the PVC valve to that side of the engine. I will switch it back to the other side and see if it makes a difference. I take seafoam is something you pour through the carb to clean it out? The heads are only about 3 years old with maybe 3000 miles on them, Edelbrock street performer heads.

 Do you know if there is a baffle inside the valve cover where you moved the PCV valve to?



__________________

1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
oshawacliff


Poncho Master!

Status: Offline
Posts: 2252
Date:
Permalink  

oshawacliff wrote:

Seafoam candidate?

Sea Foam comes in a variety of products for gas and oil.  I usually ad the oil product and drive 1000 km before the next oil change.  Just dump a can in the gas tank filler, cant hurt anything.  Seems to work.

Diesel products available also.



-- Edited by oshawacliff on Saturday 19th of November 2022 12:02:56 PM

__________________

Cliff

Done Hurryin

Like the larger type for my eyes. 

 

 
seventy2plus2


Canadian Poncho Superstar!

Status: Offline
Posts: 7787
Date:
Permalink  

The PCV valve is to be in the drivers (left) valve cover. The reason for that is the rotation of the crankshaft causes a buildup of crankcase gasses on that side, and they need to be evacuated. A vent is then provided on the passenger (right) valve cover to replace the evacuated air.

__________________
70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop

 

 
zak404


Addicted!

Status: Offline
Posts: 104
Date:
Permalink  

Yes both sides have baffles in them, I have always have the PVC on the passenger side in the past



__________________
zak404


Addicted!

Status: Offline
Posts: 104
Date:
Permalink  

oshawacliff wrote:
oshawacliff wrote:

Seafoam candidate?

Sea Foam comes in a variety of products for gas and oil.  I usually ad the oil product and drive 1000 km before the next oil change.  Just dump a can in the gas tank filler, cant hurt anything.  Seems to work.

Diesel products available also.



-- Edited by oshawacliff on Saturday 19th of November 2022 12:02:56 PM

 Ok will try that in the spring 



__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.
Canadian Poncho Homepage -> Canadian Poncho -> Beaumont Power Train Tech Forum -> Spark plug fouling
Tweet this page Post to Digg Post to Del.icio.us
.
Support Canadian Poncho!
Select Amount:
<
.
.
.