3.8 throttle response

[JoeliusZ28]

well just talked to derek and he thinks it might be torque management - hadnt even thought of that so im gonna look into it.

edit: It appears that all cars were not BOTH y87 and automatic were equipped with torque management. So thatd be me and would perfectly describe my symptom. So i have nothing to worry about, just something ill have to fix later on down the road

[ThreeHonks]

Joel,

Mike had similar sypmptoms with his 02 V6 camaro and the cat ended up being clogged. I would strongly look into this, he basically said that it acted exactly the same way as you described yours

[JoeliusZ28]

Joel,

Mike had similar sypmptoms with his 02 V6 camaro and the cat ended up being clogged. I would strongly look into this, he basically said that it acted exactly the same way as you described yours

is there an easy way i can check for a clogged cat? I dont have an infrared gun like was suggested earlier.

I have noticed the car will smell like rotten eggs after I gun it, but im pretty sure most cars do. Also I thought 15.8 @ 88 in the 1/4 mile was pretty decent for a clogged fuel filter. what to 5-speed v6s normally run?

[steddy]

Well, this is and "old school" type thing, but you can run the car when it's cool and put your hand against the tailpipe briefly and see if there is a change in it's RPMs. Again, this is about a 15 year old method, but seemed to work in the dealership, although, I'll admit, VERY shadetree.

[01v6cmro]

is there an easy way i can check for a clogged cat? I dont have an infrared gun like was suggested earlier.

I have noticed the car will smell like rotten eggs after I gun it, but im pretty sure most cars do. Also I thought 15.8 @ 88 in the 1/4 mile was pretty decent for a clogged fuel filter. what to 5-speed v6s normally run?

15.8 is respectable, but if your cat's clogged, it'll slow WAAYYY down. just give it a week or two.

I, too, had a clogged cat on my 01 v6 Camaro. Do you have a vacuum gauge? That's the best way to see if it's clogged. A more manual method is to bore a couple big holes before the cat and drive it and see if it's more like you remember it. You can always weld them back up if it's not that.

This being said, our electronic throttle bodies do lad, but not to the extent you described.

Oh, and as far as cheap mods go, I have a z28 catback that'd bolt right up. If you want it, it's yours. Are you anywhere near Ann Arbor?

[lozanoa11]

That is a pretty good 1/4. I ran w/ a auto 15.8X with 160,000 on the clock. I have seen better stock v6's. There isnet and easyer ways then useing the tempeture method. Other ways include cutting the thing off and just being done with it. cutting a hole and welding a bung in the exhaust and testing the exhaust backpressure with a tool im shure you don't have and compairing it to specs that would be hard to find.
Edit: what was your trap speed and 60'? I would think your trap speed would be low if the cat was clogged. And your 60' would be low if it was your throttle body. The fuel filter would make your 60' low also. I think your looking more at a lazy throttle body. Or mabey the fuel filter is just the problem. I would change that out now b/c it needs it anyway

[JoeliusZ28]

15.8 is respectable, but if your cat's clogged, it'll slow WAAYYY down. just give it a week or two.

oh perhaps im not being clear... the car has been like since i bought it. if anything id say it runs stronger since i first got it.

This being said, our electronic throttle bodies do lad, but not to the extent you described.

how much do they lag? I can shift pretty fast... and it quite routinely feels as if im going into the next gear at 0% throttle, but then will immediately recover.

Oh, and as far as cheap mods go, I have a z28 catback that'd bolt right up. If you want it, it's yours. Are you anywhere near Ann Arbor?

Ive been looking for exactly that!!! awesome!!!! shoot me a PM ill be heading over the east side this weekend, i could pick it up friday night.

[JoeliusZ28]

Edit: what was your trap speed and 60'? I would think your trap speed would be low if the cat was clogged. And your 60' would be low if it was your throttle body. The fuel filter would make your 60' low also. I think your looking more at a lazy throttle body. Or mabey the fuel filter is just the problem. I would change that out now b/c it needs it anyway

Trap speed was 88 finishing in 3rd. I tried shifting to 4th and lost 4 mph.

I disagree with you that the TB would affect my 60 foot, because id just have to hit the gas sooner. I cut a 2.2 60 foot with it....and with only 200hp, that is some boogeying off the line I was trying to find the limit of the track and it ended up dead hooking. It launches way better than my Z28 ever has.

[lozanoa11]

If its opening slowly then it would be a longer time till you reached full throttle effecting 60' time but that is a good time i think my best was 2.1 with awsome traction. If your not feeling a lag between shifts then i don't think it would be the tb. I would like i said just replace the fuel filter and see if that fixes it.
Edit: that was the same trap speed i had if not better so that may rule out a bad cat b/c it would give you more problems at high rpm then low.

[JoeliusZ28]

If its opening slowly then it would be a longer time till you reached full throttle effecting 60' time but that is a good time i think my best was 2.1 with awsome traction. If your not feeling a lag between shifts then i don't think it would be the tb. I would like i said just replace the fuel filter and see if that fixes it.
Edit: that was the same trap speed i had if not better so that may rule out a bad cat b/c it would give you more problems at high rpm then low.I

Fuel filter has already been replaced. I still disagree with you though, when you are launching you arent smacking your foot right to the floor and the reaction is all in your release of the clutch. On shifts I am going from WOT to 0 zero throttle and back to WOT in probably less than a second. So if there is any lag in the TB, its definitely going to be noticeable there.

[01v6cmro]

oh perhaps im not being clear... the car has been like since i bought it. if anything id say it runs stronger since i first got it.


how much do they lag? I can shift pretty fast... and it quite routinely feels as if im going into the next gear at 0% throttle, but then will immediately recover.


Ive been looking for exactly that!!! awesome!!!! shoot me a PM ill be heading over the east side this weekend, i could pick it up friday night.

Well, we could go for a quick spin and you could try out my car. It has a few mods, but none tranny related, so shifting will be the same.

I'm guessing that the lag is normal, and you're just used to the "pushed back in the seat" feeling that a manual trans gives you. That's why people swear manuals are faster (lies!!!)

It sounds like you need a shift kit and a corvette servo

I'll PM you details about the catback.

[JoeliusZ28]

my car is a manual

[01v6cmro]

Wait, Have you tried staying on the throttle a bit while shifting? I know it's tough on things, but it might answer a few of your questions. If the "lag" goes away, maybe your car just winds up and down quickly. Either way, if you have more than 75k miles or do a lot of city driving, i'd check your cat first and foremost. When we removed mine, it weighed literally twice what the new cat did.

[JoeliusZ28]

Wait, Have you tried staying on the throttle a bit while shifting? I know it's tough on things, but it might answer a few of your questions. If the "lag" goes away, maybe your car just winds up and down quickly. Either way, if you have more than 75k miles or do a lot of city driving, i'd check your cat first and foremost. When we removed mine, it weighed literally twice what the new cat did.

yea and it wont let me... seems like the synchros cant handle it and it locks me out of gear. In order to shift smoothly at WOT (or even any time) i have to start hitting the gas a little before releasing the clutch.

[01v6cmro]

yea and it wont let me... seems like the synchros cant handle it and it locks me out of gear. In order to shift smoothly at WOT (or even any time) i have to start hitting the gas a little before releasing the clutch.

Oh. that sounds expensive haha

Ummm, well you're a little bit beyond my area of expertise. Are you a member on FTV6? They've got some good trans guys over there.