Guys,

Started troubleshooting my engine woes last night (rough idle, stumbling, no power). I pulled the PCV valve hose and plugged it. Started the car and let it run for a little while, then removed the plug in PCV hose expecting car to stumble and die. Nope, made no difference when I removed the plug. Was trying to think of reasons why it wouldn't have affected it and why I was feeling no real vacuum?

Could a bad vacuum leak somewhere be the issue? Any thoughts or ideas?

MAF seemed clean, clean air filter, plugs look ok, coils look ok. Next step is compression test.

I can hear what sounds like a huge vacuum leak but was unable to find it. Didn't have incense or anything to try to blow smoke last night but will pick some up too...

Thoughts/ideas/suggestions.

Thanks,
Jonny

 

many small leaks can add up to one big one too can't remember what people use to spray around their engines to find a leak, something combustible I think!

 

Yep,

spray something combustible in short bursts in a defined pattern and when it gets near the leak the engine will increase RPM. Some have used WD-40 but I am sure there are better products for this test maybe starting fluid but that might be a little too flammable

 

Soapy water works great on cold engines and throttle body spray works well, but it might not be a leak. Hoses near really hot areas haven been known to get soft while hot and collapse on it's self.