Fuel enrichment when cold causing issues maybe? Or maybe the temp sensor is bad, so fuel enrichment is not happening.
There will be a bunch of things different in the tune when it's cold.
Expect to pay around 10k for a decent rebuild. Maybe 8k if you take short cuts... 12k if you do everything properly.
Removing the engine and taking off the heads will save a bit of money... but the costs just add up and up and up.
There are diagrams around... you just need to search for them.
It's very likely that Joker is correct though. Just a spare plug with some power going to it, so useful for some previous owners to hook into for whatever.
Thanks.
How big were the fluctuations, if you remember? I am seeing +/- 0.25 psi at idle.
Were they a problem for the tuner, or you just judged them as warranting the dampers before it got to the tuner?
Front diff has gone bad, but only when warm? Sounds weird to me. Could just be some worn bearings somewhere. You should get it properly diagnosed before trying to find a new box.
A replacement box though should only be $300 to $500. Labour will be easily $1000 these days. You'll probably want to change the clutch and replace or machine the flywheel. Several hundred more dollars there.
But if it's just a worn CV or wheel bearing, it'll be much cheaper!
In general you would only notice a coolant smell once it is escaping from somewhere... in this case the overflow bottle. I would take some out of it (when it's cold)... if it still keeps overflowing,
you maybe in trouble.
Probably not. The evap valve should only open when the engine has vacuum and if the blocked line is going into the intake manifold... the evap valve opening won't do anything at all.