bluefire7002

I dont know if this is related but here's something strange on my Manual 2016 Z. Have had this intake filter on for about a month... Today I downshifted quickly and went WOT on the fwy. Noticed some lag, didn't think much of it, went to dinner.

Leaving about an hour later, I noticed once I started to go at least half throttle (in any gear) car starts to hesitate. like a stuttering issue. This is the only Mod I have so im wondering if this has anything to do with it. I already checked all the hoses and everything that leads to intake filter. Everything is on tight. Anyone have any ideas? seems like definite loss of power now

madrob2020

Not nearly as astute as alot of folks on here but I'll take a stab. With the little info given, sounds like air starvation when engine needs more for acceleration. With no CEL/code it doesn't sound like much else going on. What type of filter? Oiled/not oiled? Was temp much cooler than normal (don't know where you are)? Other, smarter folks will soon chime in lets hope. I'm bit curious.

Warp Factor

That's a dry filter, right?
Bad batch of gas?

dmaxx3500

put the ''STOCK'' air filter back on and see if that fixes it,,if not change the fuel filter[if it still has one]

383vett

Put the stock setup back on. If it still happens, call the dealer.

dollarbill

Agree with others to put the stock setup back on. Fill up with premium gas. Also curious as to what your driving mode selector was set to when all this was going on. When my Z is in econo mode, I have a stumble going from 4 mode to 8 mode at times. Good luck.

bluefire7002

Thanks for the response guys,

Yup I put on the R&D filter on about 5 weeks ago and have yet to have an issue up until Saturday. Kind of thrown off by it as the car has ran super strong on just that. I did put Chevron gas at a station I hadn't been to in a while (2 hrs before it started doing this) so that was my other thought... Bad batch of gas. Will go and put some Shell later and then Switch the filter to stock. Will report back! Also, it started doing in this In tour, tried the other modes yesterday and still did it.

dar02081961

If it ran fine for several weeks it isn't likely the R&D filter set up.
What you describe sounds like a spark plug breaking down under boost.

Simple check is to change the plugs and see if the problem goes away. (unless you can do a scan and data log?)
This also would explain your loss of power. And no a bad plug does not always throw a code or set a check engine light.

Let us know what you find.

madrob2020

Replacing spark plugs would be quite expensive & time consuming. Let the dealer figure it out if possible (would definitely remove your filter 1st). I had a ported TB installed for exactly 31 days & then a code that was traced back to it by eliminating one thing at a time (each time code was thrown again) till replaced the OE TB & nothing in the past 2 1/2 months.

TXRR

Fuel pump

dar02081961

Your point is well taken. I often look at things from my perspective.

I could change the plugs in about 30 minutes for $60 or so.

No way that's more time consuming than removing the intake, replacing it with the original, taking the car to the dealer and waiting on it half the day. Then re-installing the CAI when its all said and done.

To me that's worth 60 bucks and the reduction in anxiety I feel every time I take my car in to the dealer. My dealer does good work but being a do it yourselfer any dealer visits makes me a bit uncomfortable.

Also if the intake worked fine for almost a month, and works fine on hundreds of similar vehicles, then troubleshooting logic tells us the intake isn't the likely culprit. Something else has changed since the installation. Could be something changed with the intake installation or another unrelated problem.

Stumbling issues on boosted cars that idle fine and run good under light load are more often than not related to spark plugs breaking down under load at higher boost and cylinder pressures.

But you are correct taking it to the dealer is always an option.

wagoetzmann

What about trying disconnecting the battery and letting it reset? Easy and quick.....

C7/Z06 Man

If the only change is the filter than reinstall the OEM and see what you come up with. Still bad and under warranty let the dealer check it out.

What's the R&D filter?

ZoratZ06

Is there a specific RPM it's happening at? If you're in too high of a gear and too low of an RPM...you will get a slight hesitation until 'boost' and RPM builds.

C7/Z06 Man

Please do.

bluefire7002

Hey Guys,

late for an update on this... Caught a shitty cold last week and didn't really bother with the Z. Finally checked it out last weekend.. first thing i wanted to try was putting in gas from a regular gas station I go to. Filled up. drove around for a bit, finally decided to get on it.... guess what, it completely stopped chugging/hesitating on low end!
No I didn't put **** gas when the issue started, both of the times it was Chevron. I guess I know to never go back to that gas station again!

Glad it was something simple. Thanks for all the help guys!

Warp Factor

I reckon some stations don't sell a lot of premium, so their gas may not be very fresh. Another possibility is that the gas had some water in it, so I'd probably put a can of dry-gas in there just in case.

JoesC5

Several times I paid for premium gas, thinking I was actually getting premium but I got regular, and that was at well known brand stations(EXXON) located in different states.

AORoads

Not for personal compensation, but you might just call the owner of the gas station and tell him about it. It's unlikely, but he may not know even with frequent samplings of gas.

BTW, what filter are you using as the aftermarket one?