No Throttle Response At Higher Speeds??

[Redflash01]

I have a 2001 3.4 V6 with a CAI 3in with inverted top K&N. Off the line and until 60 my car is a beast, at higher cruising speeds i have no throttle response and seems like it takes too long to get the the next gear....? I am putting headers on her and a custom exhaust setup, also going to DHP for PCM tuning..... I do not understand what the issue is. Is this common or is there something wrong with air/Fuel ratio and how can i fix/Troubleshoot. Please advise and throw some things at me...thanx, you guys/gals are great and i plan on becoming VIP here shortly, this is a great site.

Just so you all know Pimpalero put a note on my car for me to check this site out..Good promoting!!

[misslindseysue]

What do you mean by next gear? You only have 4. You mean you don't get the downshift soon enough?

[Redflash01]

that is just what it feels like...No Balls to it, and no throttle response at higher speeds (Like trying to pass on 94)

[King Asoka]

lets look at an example.

Lets say your at crusing speed, you will be in OD. So to get out of OD you have to give it a fair bit more throttle for it to downshift. I find that I have to press down about an inch to get it out of OD, unless im going up a hill.

is this what you are talking about?

[misslindseysue]

Yeah, you almost have to give it 100% to get the 4-3 downshift at those speeds. I could ask Pat exactly how much throttle you need, but I know it's quite a bit.
If you are giving it that much and aren't getting a response then you have a problem.
It's not air/fuel if you haven't set any lights.

[Redflash01]

That makes sense about the the OD but when i have her mashed as far as she can go it just doesnt feel right, that is what concerns me..... When i pass, i stomp on her hard!!It doesnt always happen though??Sometimes i get the power and sometimes not. I am not throwing codes anymore either. I had a bad IAT sensor and she was running lean but it has all been fixed...?

[brsexton]

Dirty Fuel injectors maybe? They can cause issues like this with NO check engine light. You should take it to a shop that does the professional fuel injector cleaning. Its one of those things that may not help, but won't hurt.

[Redflash01]

That is not a bad idea! I will change out my fuel filter also, and a fresh tune up!! Thanks for your help