Runaway!

[Smoker]

I may be showing my noob-ness here, but I thought this only happened on turbo motors?

My 1.6na had been acting weird, idle hanging high, sometimes wanting to rev on its own...

Then I stopped for fuel and when I went to leave, it started up, clattering a bit more than usual, then just went for the moon. Before, when it wanted to rev on its own, turning the key off did the trick. This time, no dice. Tons of white/gray smoke out the exhaust, and I had to dump the clutch to shut it down.

What went wrong? And what do I do now?

[Smoker]

I just fired it up again, because my curiosity was getting the best of me. I wouldn't say it's purring like a kitten, but it's not trying to run away, either. I'm confused.

[RabbitJockey]

usually blow by forces oil from the head and crank in to the intake.  first of all disconnect the ccv hose that goes from the valve cover to the intake.  how is compression?  u can add the cam splash guard and another breather hose to the front of the block, both of those things help a lot but usually this is a good sign that the engine is spent.  had this happen to me on an old 1.6na i had.

[RabbitJockey]

mine usually did it on the highway

[air-cooled or diesel]

its either blowby and cc pressure ^^pushing oil to the intake thru vent in valvecover; or an ip problem. check pressure coming out of vent and how much oil is making it out of that vent. of course a compression test^.

[Smoker]

Compression was 400-425 cold, with a harbor freight tester. I haven't checked it since I got it running. I do see a fair amount of oil in the vent hose... more than I'd expect.

[Smoker]

I guess I'll end up putting a fresh 1.6 together with stuff I've got lying around here. Win some... Lose some.

[air-cooled or diesel]

i dont see how thats a problem; 400+ cold is excellent; why now do you have a lot of oil coming up to intake??

[Smoker]

I don't know... Any ideas?? I thought those numbers were decent as well...

[Smoker]

Unless it is an i/p problem?

[air-cooled or diesel]

if your compression #s are that good why do you have oil coming up out of the vent to the intake?? retest compression is my first thing, right now.check vac pump and connections, a leak here can push oil into the intake as well,,

[Smoker]

True. Can't say I thought of that! My weekend is pretty much packed, but I think I'll check compression again Monday morning.

[Smoker]

Because of compression #'s are good, I shouldn't have enough blowby to cause problems...... Right??

[TylerDurden]

...check vac pump and connections, a leak here can push oil into the intake as well,,

As if the vac doesn't vent into the crankcase already?

[TylerDurden]

Because of compression #'s are good, I shouldn't have enough blowby to cause problems...... Right??

I'd get current compression #s... rings are the usual suspect.