I feel like i'm losing power and the rpm drops when I lightly gas it after stepping on the brakes and releasing. The car was driving real sluggish. So I seafoamed to the engine, and poured it in the gas tank. After the seafoam and in the gas tank, the car improved it's power. Once the tank was empty, the power was gone again. It doesn't pick up like how it did when I had the seafoam in the tank. So I'm assuming it's the seafoam in the tank that is giving the car more power.

Now, since that's what I came up with. If I am losing power, and seafoam is helping it, what is wrong with my car? Please give me some advice. Thank you guys!

 

seafoam the tank--cleaning doseage is 2 oz per gallon = 1 can to 1/2 tank
maitenance dose is 1 oz to 1 gallon,,1 can to full tank

It is cleaning the injectors and intake valves- plus carbon removal from the piston tops

May run funny after the first tank as its still blowing out crud or needs a bit more to complete the job

Spray TB or carb cleaner or deep creep- at the TB plate on both its sides and edges

If your spark plugs are over 70k miles its time for new ones, do the intake manifold vac port again then a week later change the plugs,, NGK Iridium IX for the gen2

 

did you put the squeeze clamp back on the vac hose?

 

huh? I already did the seafoam.. are u telling me to do it again? everything put back the way it is. my question is, if the seafoam is causing me to get more power, without the seafoam, it has less power...so what is the problem.. did all you said.. i actually got intake cleaner...plugs were changed a few thousand miles ago when i seafoamed..

 

what kind of gas r u using?

 

91 premium from shell or sometimes 76 and chevron

 

rules out the gas. try seafoaming again, depending on what kind of maintenance was done on it, that one can might have not been enough to do the job.

 

Rajca, any chance it could be the tranny? When on the freeway, then having to brake, then i wanna gas it lightly, the rpm drops and very sluggish

 

not the trany. iac?

 

what will that do if it's not working properly? rpm idles fine when i'm at a stop..doesn't hop up and down..

 

maybe someone that had this problem can chip in, never had this problem happen to be. but i know that when i let off the gas on the high way my rpms drop down and then raise up but they usually drop down to around 800-900or so and then get back to normal.

 

you guys dont have 93 anywhere?

 

different areas have 91 others 93 and 94--its just more additives to delay ignition

Doesnt matter as long as its 91 or over,,whatever they sell where you live
More octane above 91 doesnt make more HP on a stock TL, (non turbo or SC)

Seafoam- use a whole can in the intake vac port at TB with warm up and after drives.
1st timers should repeat in 1000-2000 miles, a month or so- to do a finishing job with more skill than before~
Then you should be good for a year on the manifold and throw a can in the full tank of gas after/every 5000 miles if you want. Good idea before a trip too

 

My car always has a bit more power when running a fueal cleaner in the tank. To me its almost like a octane booster.

 

its actually the fuel injectors and pistons getting clean that makes more power
Higher octane on a normally aspirated car wont make more HP

 

i actually felt that i had less power with seafoam in the tank and that the car didn't run as well, but now that i've refilled it feels smoother than before...guess i had a lot of gunk to burn off.

 

use seafoam transtuner
its for transmition
see what it does for you

 

I wouldn't risk using it in our transmissions. I used it on my old ford ranger and it seemed to help that one a bit though.

 

do NOT use seafoam trans stuff- that will surely carry away any grip left in the clutch packs!!!

 

You feel?

Your RPMs are going to drop slowly if you're on the highway and you hit the brakes. The TQ is locked up and as you slow down the motor will to. If you jab really hard the car will downshift from 5th to 4th and if you're on the right grade and jab it just right you can get 5th to 3rd, or 5to4 to 3rd.

We need details like:
Mileage
Service history
Knowing how old your plugs are would help
Air filter?

The reality is there is nothing in seafoam that will give you more power. There is a lot of debate as to it's effectiveness at all. When we talk about 'feeling' less power it gets so subjective as to be a waste of time. What seafoam might help you do is restore your power however you wont feel it while it's in the tank running through the car. It's not a performance booster. It will over time, possibly remove dirt.

FYI - Nothing you put in your tank is going to cause you to develop more HP/TQ than the motor would on 91/93oc. It's all in your head. You'd have to burn something with more energy in it than gasoline, which you cannot legally get or burn in your car.

If you really think there is something wrong with your car. Inspect the follow:
- Plugs
- Air filter
- Clean TB
- Check valves

 

Not really possible. Most cleaners have lower octane ratings than 91 fuel and some even come with warnings as such. Stating 'Should not be run with regular fuel'.

It's all in your head. As is the octane boosters which are horrible for your plugs.

No matter how much higher the octane rating is. No more power will be developed beyond 91oc.

 

You would need a blind type of scientific test to prove that stuff increases power. Like Rob says it's too subjective.

 

Your probably right but the car seemed to have just a tad more power when running techron or even some seafoam. Then again I had a crack in my header for a bit so that may have something to do with it. I never run octane boosters.

 

Winter gas can be very different from station to station. I have experienced my car running poorly=less power, rougher idle etc. After running out the current tank of gas and refilling with a different brand=it all improved. So change brands and see what happens first.

 

Rob, thanks for the input and fully reading my post before replying. I will have to disagree with your "it's all in your head." The reason being is that when the seafoam is poured into my 1/4 tank of gas, the car didn't do any of the things i listed above, such as rpm dropping when I lightly gas after braking. Instead, the car responded right away with the light tap of the gas. RPM raised instead of dropping. Once I lightly gased, the car responded right away, unlike before. But once the tank was gone, it went back to the same way, therefore, concluding that the seafoam in the tank made my car respond better.

"Your RPMs are going to drop slowly if you're on the highway and you hit the brakes. The TQ is locked up and as you slow down the motor will to. If you jab really hard the car will downshift from 5th to 4th and if you're on the right grade and jab it just right you can get 5th to 3rd, or 5to4 to 3rd." --- I totally understand what you are saying, but what I'm trying to say is, this did not occur when I first had the car at 50k 60k miles, it didn't act like this. That's why i figure something may be wrong??? I've had a problem with the throttle cable before, and when the dealer fixed it, the car was soo powerful, now, it just doesn't have the same pull to it.



We need details like:
Mileage: 89k miles (I want to add, this problem hasn't just recently occured..if you look at my other posts, i've complained about this almost a year ago..)
Service history( Oil changed every 7k miles)
Knowing how old your plugs are would help ( plugs were replaced after I seafoamed)
Air filter? (Stock air filter, haven't changed it)

If you really think there is something wrong with your car. Inspect the follow:
- Plugs - plugs were changed after i seafoamed
- Air filter (Stock air filter, haven't changed it)
- Clean TB- Just bought some throttle body cleaner, no change
- Check valves- As in check the valves? After I changed the spark plugs, i noticed that the valves are tapping a bit louder)

thanks again rob

 

I've already changed types of gas, chevron, shell 76..winter summer, spring fall, it doesn't matter, same result.

 

anybody ever drive a stick, when you put it in the higher gear than it's supposed to be in, and u step on the gas pedal, it'll rev really low and won't produce a lot of power, but you keep your foot on the same amount until the rpm slowly rises up, you then get power, well that's what my car's feeling like.. just struggling until the rpm gets higher, which i did not have before..

 

Know this might not help but as I mentioned my car was doing the same thing and it turned out my xs headers had a creck at the manifold. Maybe your losing backpressure somewhere not sure.

 

how much seafoam did you put in 1/4 tank
The easy method for cleaning doseage is 2oz per gallon of gas,
thats 1, 16 oz can to 1/2 tank

 

forgot wat size can I used, it was the regular sized can that was about 8 inches tall.. to 1/4 tank of gas

 

Is it not downshifting? It sounds as if it should be after reading ^. Cat. converter possibly restricting flow?

 

What type of plugs are U using ? I change mines to NGK iridium and got the same symptoms ...MPG drop , less power , valves knocking louder , very sluggish ......
So decide to go back to old original plugs and performance is back .
After changing the plugs did you notice any problem or change ??

 

Valves knocking..louder.. ??

 

did u check the gap of the plugs before u put them in? i know ur not supposed to gap them but check to make sure

 

No I did not check the gap before installing the new iridium plugs ...but when I remore them ,all 6 are running a bit rich ...the car idles OK with them but lost power when accelerate

 

should have checked the gap. the parts guys or at the factory or during shipping they could have gotten damaged or fell.

 

I still do not think the gap is the problem ....maybe iridium does not has enough spark to burn all the fuel ( running rich ) .
Maybe double Platinum is better then the Iridium that might explain the extra cost to get
them .

 

how do u know u were running rich?

 

I have been running iridiums for a while no issues.

 

go research iridium plugs and then stop talking smack
its a better metal- plain and simple. Modern mining techniques made it avaliable to the public- not just for race cars and airplanes anymore!
We dont need Lazer plugs- all this means is the type of weld used to join the parts

double platinum is not stock- single is

NGK plugs comes with a cardboard protector on the end- if its not damaged the gap is correct. Dont mess with the gap !!!! you will damage the plug