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Yeah, but if I throw no money at it, it'll never be fixed. :)

I'm aware that the coils probably won't have a big effect. But, these are the new design, and the current set is mis-matched and high...

Unplugging the MAF, the engine doesn’t run that much rougher, only slightly more so.

MAF reinstalled, at 2500 rpm, the fuel trims are as follows:

STFT bank 1: -7.03%
LTFT bank 1: 5.47%

STFT...

The STFTs are not consistent with each other. I might have an exhaust leak as well still.

The idle is also not consistent. It will be as high as 800 or as low as 500.

Will also test MAF as...

The stock intake is pretty good, I'm doubting it's the thing causing a poor idle.

That’s my bad, I made a bit of a dumb joke. If the sensor was indeed bad, I’d happily pull the intake again. I feel like a pro by now!

It may just need more time, I agree there. It’s been about...

Wishful thinking?? Not exactly sure where you got that. These are my reasonings I’ve come to after discussing issues with my mechanic and internet research. Of course I could be wrong, which is...

I did go ahead and throw some money at my problem and bought a new set of coils. My reasons are as follows: 1). When the last engine that was in it blew, I bought a few new coils to try and diagnose,...

For trims, notice 99.219 + 0.78 equals 100% (probably w/ rounding error). From a purely mathematical standpoint they appear to be the same thing just expressed differently. Usually they’re expressed...

Here are screenshots from OBDFusion. Car idling after warming for about 15 minutes.37485374863748737488

Edit: Uh, not sure about those O2 sensor voltages. Different software put them around 1.5v....

As old as the car. 150,xxx. Indy thought they should be fine unless one or both totally failed, though perhaps "fine" means "running but running kinda rough"?

Post-cat O2's are not present in the car (catless headers), they've also been coded out. Pre-cat voltages are fluxuating between 1.46v and 1.55v approximately.

Thanks for asking--you know, I'm convinced it was something like 20% my imagination, even though I did measure and there was a considerable difference in wheel well clearance on either side--I...

Prior to an exhaust leak, I was seeing 7-12% on average for the fuel trims. After fixing, about -15%. After resetting adaptations and driving 500+ miles, they're at about 6%.

I hadn't realized I...

Car has 150,xxx miles. No codes whatsoever from ECU (except SAP, which has been coded out anyways).

Do coils soft fail at all? Not misfiring, so they didn't seem likely to me.

CCV was replaced,...

The f connector and the fuel vacuum line have been replaced too :|

Been replaced as well, OEM cap and new gasket too.



Another smoke test it is. Did the rubber glove-over-the-upper-boot method and after filling it with smoke, it stayed inflated for several...

My bad, you're right, totally forgot to mention, did reset all the adaptations (whoops, bucked like mad until I did the throttle reset!), and I've actually driven it about 500 miles--still a little...

Hope everyone is having a nice November :)

My ZHP is still idling a little on the rough side. It's not a cold idle, it's usually after it warms up. Car starts fine, cold idle is fairly smooth, but...