Well if anyone is interested I’ll post my thoughts as far the problem and try to attach YouTube video. So I think I have a sticky valve problem on the 4th cylinder. I suspect the exhaust valve is staying open after the piston has reached TDC and on its way back down causing vacuum to be created...
So I am going to assume that this is not a very common problem and from what I have read around the internet, it’s not good to bring it back to idle fast. Should be bringing it back to idle smoothly.
I wanted to start this thread because I have read things that talk about exhaust pressure. I have ran into an issue where I have replaced intake/exhaust manifold last year because it was cracked on the outside. I would notice a misfire if I snapped the throttle and back to idle on the hose or in...
Well new one is on. Misfire still continues. Still have some water on plug 4. When I originally took everything off last year the restriction plate was different which is pictured. One that I installed does not have drilled holes. This would allow more water to flow through but would this make...
I am going to attach pictures. So I shouldn’t remove more than .009 of the surface. Well I think I’m going to have to get a new elbow/riser. Can see a lot of light with straight edge. I put an .008 feeler gauge and it makes it through.
Ok thank you for all the replies. I am going to clean all surfaces and check with feeler gauges and I will post back to let you know! Just wanted to say thank you so much! 😁
So this was the mating surface of the riser last year when I had to bare metal before I installed on my brand new manifold with a bare metal surface. I did not know about the checks you have provided at the time but with your opinion would this have caused issues because it was pitted a bit?
I have 2006 Volvo penta 3.0 GLP-E in a glastron gt185 boat. I replaced the manifold last year because person I bought it from tried to jB weld the underside of it. There was water in the rear or the manifold by cylinder 4. Just chalked it up to was internally cracked as well and replaced it...