another problem (misfire)

[Tsimmons]

Soo my car was misfiring about 2 weeks ago so I changed all my spark plugs nd it stopped until about 2 days ago it started again. I went through made sure all my plugs were tight nd got new wires it didn't help. I'm not pulling any codes. Hopefully someone can help?

[xXManwhoreXx]

You gapped the new plugs correctly? Pull them and check that they didn't expand or blow back closed

[Tsimmons]

Yes they were gapped correct nd I used autolite iridiumplugs nd Bosch wires

[xXManwhoreXx]

Check to see if gap changed and if you have any fuel damage from leaning or from washing the sparkplugs from the misfire

[04PONTIACGA]

Originally Posted by Tsimmons

Yes they were gapped correct nd I used autolite iridiumplugs nd Bosch wires

Use only AC Delco or NGK. GM's are finiky with others brands.

[Tsimmons]

Well pulled all my plugs nd #5 is gray/silvery Soo what does that mean? All the others are fine.

[xXManwhoreXx]

Post a picture of it. Grey silvery doesn't help too much lol

[xXManwhoreXx]

Looking at spark plugs can tell you a lot about an engine

[Tsimmons]

I can't post a pic because of phone but with reading alot of other forums I'm thinking I've got a bad intake manifold gasket not sure though I think cylinder 5 is burning coolent a tiny bit not enough to be real noticeable. But to further explain my cars okay till I get to about 40mph than it starts misfiring. But if there's another way to let you see the picof the plu let me know.

[WIALERO]

Better get on that then the kit was only 50$ if I remember correctly use felpro

[xXManwhoreXx]

I've had a limg leak for like 5 years with no problems other than overheating, which is fine if I crank up my heat. Shouldn't effect your plugs unless its a BIG leak

[WIALERO]

Mine still heats upto half way then if I sit for 5 min it goes up to 3/4 then it drops when I'm driving head gadgets are gunn be done soon

[Tsimmons]

So would you agree that it might be intake manifold gasket? Everything that's wrong is car misfires around 40 when over 2.5 rpm cylinder 5 plug Burns idk what nd I got shii gas mileage haha the only other thing I could see it being is head gaskets. Still not pulling any codes at all I just don't really know what it is.

[WIALERO]

I have a cylinder3 misfire once or twice a week but runs just fine even replaced the cap wire and plug still have a misfire but car still runs smooth it should not be tht big of n issue but if it annoyes you then you could try the intake gsgets

[Tsimmons]

I have to try something its pretty bad

[RalphP]

Originally Posted by Tsimmons

I can't post a pic because of phone but with reading alot of other forums I'm thinking I've got a bad intake manifold gasket not sure though I think cylinder 5 is burning coolent a tiny bit not enough to be real noticeable. But to further explain my cars okay till I get to about 40mph than it starts misfiring. But if there's another way to let you see the picof the plu let me know.

The gotcha is that if Cyl5 IS burning coolant, you quite possibly have trashed the catalytic converter also.

Another thing to check is that the Cyl5 rocker arms are running right. The heads on the V6 are known to occasionally have the rocker studs pull out slightly (something about aluminum heads and steel studs).

RwP

[3800l67gam]

Originally Posted by xXManwhoreXx

I've had a limg leak for like 5 years with no problems other than overheating, which is fine if I crank up my heat. Shouldn't effect your plugs unless its a BIG leak

Change that lim pretty soon that head gasket will catch up to yee

[Redog]

Originally Posted by 04PONTIACGA

Use only AC Delco or NGK. GM's are finiky with others brands.

Yes, exactly.

Originally Posted by xXManwhoreXx

I've had a limg leak for like 5 years

And spell check, people need to make friends with it

[zzyzzx]

Originally Posted by xXManwhoreXx

I've had a limg leak for like 5 years with no problems other than overheating, which is fine if I crank up my heat.

[Tsimmons]

Well ill be doing compression test nd a bunch of other things this weekend Soo hopefully I find what it is. Ill update this situation more in in a few days