My car kept holding back after 4k rpm
 

Everytime I stepped on it after 4k rpm it was holding back, idk why. Could it be because of the warm whether? I have a white out frs, injen intake, srt header back, and it was tuned. I reflashed it last night and I didn't have this problem again? I was hoping, maybe the white out would reflect the heat.

my guess is bad quality gasoline. lower octane retards the cam timing.

Could be the intake, next time it happens get some logs and send them to your tuner.

Bad quality like how?

I always use premium 93 octane. I was thinking the same thing

hmmm depends what brand of gasoline. some use more additives and some not as much. or it could also be just a bad batch like with a lot of dirt and crap in it.

http://www.toptiergas.com/

Readjust your butt dyno.

In warm temperatures, the ecu dials back the hp. It was documented in a recent YouTube video posted here. Showed something like 15hp drop after back to back dyno runs without letting it cool.

Theres a difference between warm temperatures and doing back to back dyno runs. Dyno runs you're not getting anywhere near the volume of air through the car that you would get on a highway. I seriously doubt that heat is the issue here, especially if the issue went away with a reflash.

You're kidding, right?

ignition timing not cam timing
@Frsexxxy you probably either had learned knock retard or large positive long term fuel trims... my guess is the fuel trims because if you had knock retard before the flash, with no other changes, you would have it again.

Turn off your A/c

The video can be seen here: http://www.ft86club.com/forums/showthread.php?t=35653

I'm just taking his word for it.

Lol no,
I always get white cars because they reflect heat. My 240 was white, my integra was white, and my frs is white

I've always wondered if the excellent seal of the engine bay, hood and bottom, causes a heat build-up.

I don't know about anyone else, but my engine bay is much hotter than my previous cars, without hard or prolonged driving.

I really want the side panels to vent - anyone done mods to that effect?

You'd have to do some major modifications as the faux vent attaches to the outer fender skin. The inner skin is solid.

Fairly sure the air moving under the car creates a low pressure (relatively speaking) zone at the back of the undertray to give the air that passes into the engine bay a passage out.

Feel free to expand your color pallet. The exterior color of the car has zero effect on the operation and function of the engine. If this were true, every race car in the world would be white.

The heat from the sun has next to no impact on anything going on in the engine bay compared to the little device harnessing the power of a series of thousands of controlled explosions to create power

Also, define "holding back"...isn't that right about where the torque dip is? Maybe "step on it" a bit lower down in the revs (or a bit higher)

Thanks for that.

Well, I guess I'm saying that whatever escape the air has, it's not very effective in observation. But I'd like to know if anyone else observes the same thing.

So long as it's not going to impact on any safety feature, is there any reason why you can't just cut underneath?

I can't imagine hacking away at the metal there. You're so close to the strut top mounts, I'd be weary of doing anything near there.

I was hoping it was just a small amount of panel that would require cutting. Not struts... :/

How do I do that? It must be the tune because I flashed it back to stock and now the response is much better. It's an ecutek rom

http://blog.perrinperformance.com/ho...cuteks-proecu/ this should help

I'll try this so hopefully I could get my car back on track

You did not mention that you flashed it back to stock in the original post, just that you reflashed it (I assumed you flashed the same rom back in it)... that changes a few things.. bad gas (and the knock retard that would ensue) seems much more likely to me now. Stock rom starts out with retarded timing and slowly adds it in. You also reset your fuel trims. you may want to give it a few days and see if the symptoms come back on the stock rom.

Either way, you need to get with your tuner and see how they want you to proceed.