So I picked up another IAC valve from the junkyard and swapped it in, no change in the vehicle's behavior. Drat.

Well, at least that's one more thing off the "potential cause" list haha.

However, I did notice that inside the hose between the IAC and vacuum tree, there was a small, sticky snail ...

Thanks for the reply jreed, much appreciated.

When I took the IAC out to clean it both times, it moved buttery smooth, but I've had a gut feeling for a while mow telling me to swap it out with a known good one just to see if it makes a difference. Your post gave me the extra push I needed to try ...

Thanks for the tip about the distributor shaft, I'll take a look into that and any potential grounding issues in there.

Thankfully there are no oil leaks at the distributor. I replaced that cam seal when doing the tune up @93k for good measure, and it was still dry as a bone when I replaced the ...

Did a compression test a little over a month ago, everything well within spec. Can't remember the exact numbers off the top of my head, but cylinders 1, 2, 3, 5 were at mid-high 170s, cylinder 4 at mid 160s.

Haven't done a leakdown test since compression looked good. Should I do one?

Thanks!

Thanks for the quick reply abscate, I really appreciate it!

It's definitely a tough one alright haha.

As for the plug wires - always and only Bougicord. :)

Good question regarding the cam sensor wire. I just got back from checking, and it clears all the ignition wires by a few inches at least. I ...

Hi everyone, first post here… Sorry for the wall of text!

I’ve been trying to chase down an issue with my 1995 850 T-5R (109k miles) for a while, where the engine seems to randomly (and very frequently) “twitch” while idling. The twitches range in their intensity (steering wheel shakes mildly or ...