Misfire Under Heavy Load Only

[KJMS3]

@Crazycanadian i have my catch can/PCV routed exactly like the CS instructions found here. As for the miss, I did have some mods to the car when it started, those being HPFP, the graveyard injectors, CS injector o rings and seals, CS 2.5” ram intake, CS 50/50 BOV, CS 80mm catback and test pipe, CS motor/trans mounts, and a tune on 30% ethanol blend from DramaTune (who I will now no longer be retuning to in the future). I had a 91 tune as well but always ran it on E30.

@Enki I got bored at work and pulled the oil cap off for the hell if it and got a vid, that’s attached here too but I also have a genwon. Shit made a mess but I knew that was gonna happen anyways lol.

So I can get a leak down tester early next week and do that as well and come back with the results, I would this weekend but I’ll be out of town leaving tonight. I agree with Canadian tho, it sounds and feels like an electrical/ignition issue when driving, I would think a lean condition from failing injectors would show on the datalogs right? If the leak down comes back okay then I can get a set of good coils from one of my other ms3 homies and try those.

When I was researching mods and tuners to use with these cars when I first got mine, I never saw anything about drama or graveyard being bad, must’ve just not looked hard enough. Everything I saw said go to drama or PD, and I just picked drama out of a 50/50 basically.
View attachment IMG_1147.mov

 

[Enki]

The problem with Drama is that if you're researching via Facebook you can't see the censorship that happens. I've heard many stories about people having even questions that could be construed as negative being removed, along with their presence from said group shortly thereafter. Dude runs a cult, basically.

That does look like a lot of air coming out of the valve cover, but the sheer weight of the oil could be at play here too. Hard to tell unless you're certain you felt and smelled a lot of hot smoky air coming out of there. Should smell somewhat like oily exhaust if memory serves.

 

[KJMS3]

To me it smelled like any other car when you take the cap off while it’s running, and no smoke or anything like that. Though I have noticed sometimes when topping off the oil after driving, and letting it sit for maybe 10ish mins before adding my oil, there will be a very small, faint amount of smoke that comes out of the cap while I’m pouring the oil in, not when I just take off the cap. Can barely see it but when the sun hits it right I can barely tell it’s there (it leaks bad rn but I check it twice a week and make sure it’s always full). The air coming out in that vid felt pretty moist with oil but that’s probably bc of the oil literally spraying out of it that you can see too. But it didn’t smell like if oil was in an exhaust/burning.

And yes my research was through Facebook so that makes a lot more sense why I saw his name so much.

 

[Easter Bunny]

Where did you get the plugs? People have gotten fakes from Amazon.

Do you still have your old coil packs?

Check all of the wiring to the ignition coils.

I would seriously doubt that all the coils are bad. The misfire would only be on one cylinder if a coil was bad.

@Crazycanadian I don't believe I have ever heard of someone breaking a valve spring but someone can always be first

 

[Enki]

I hadn't considered fake plugs but yes, that is a very valid consideration. I had just seen a thing on youtube about this a while back too.

Fake edit:
Found it

 

[KJMS3]

No I get my plugs from o’reilleys, I hope they’re not selling fakes lol. No I don’t have my oil coil packs anymore, I tossed them when I got the new ones. When I get that leak down tester and do that next week probably on Tuesday, I’ll take a look at the wiring harness to the coils and see if there’s anything that looks peculiar. I think I recall seeing a thread on here about people having bad coil harnesses a while back, never really crossed my mind for some reason

 

[Crazycanadian]

Where did you get the plugs? People have gotten fakes from Amazon.

Do you still have your old coil packs?

Check all of the wiring to the ignition coils.

I would seriously doubt that all the coils are bad. The misfire would only be on one cylinder if a coil was bad.

@Crazycanadian I don't believe I have ever heard of someone breaking a valve spring but someone can always be first

I haven't heard of it happening in this platform. But I've seen it in GM's, Dodges, VW and Audi's... The last one I saw was in a 2010 2.0L turbo Golf.. The spring broke, the valve dropped, kissed the piston just the right way in order to jam it closed.. since it's like our heads with 2 valves per cylinder it ran and drove great. It would throw cylinder 4 misfire codes, only under heavy throttle when climbing a hill... This motor passed compression tests, leak down tests, you name it... It was wild..

 

[Easter Bunny]

Those four brands are notorious for finding creative ways to break though

 

[Enki]

Those are the kinds of brands that weigh wiring harnesses to make sure they aren't shipping too much wire/sheathing