Integra feels slower than usual

[blackdc2r]

hi guys. got a problem with my car. My car feels slower (less torque being felt) when i full throttle my car. Normally at low range i can feel the torque gradually building up until vtec kicks in but all the sudden, my car has gone sluggish and feels slower.

I've recently changed my car's Oil and when i drove my car, it felt faster again but after afew days later.. the car has gone weak and sluggish again :(

Any reason on whats causing this and how can i fix it.??

[EKVTIR-T]

Is the oil viscosity the same?
Using the same fuel?
Did you fill to the line perfectly or overfilled?

List anything besides the oil that youve added/changed

[blackdc2r]

Is the oil viscosity the same? no im on 10W-40 now. originally i was on 5w-30 and thats when it occurred. Im guessing maybe I didnt change the oil for awhile (8k km)
Using the same fuel? Yes. always refilling Shells 98.
Did you fill to the line perfectly or overfilled? Jst overfilled like slightly? I overfilled when i previously changed my oil and it didnt affect the performance.

List anything besides the oil that youve added/changed

Maybe it could be my dizzy or spark plugs? cause I remembered I still haven't changed them yet since ownership.

[EKVTIR-T]

But you said its become sluggish now.
Do you mean after the oil change suddenly or leading up to the oil change?

You may as well inspect and or replace the plugs anyway in case theyre stuffed
Its a process of elimination really,thats why I asked what else has changed or different which might contribute to the issue

[blackdc2r]

But you said its become sluggish now.
Do you mean after the oil change suddenly or leading up to the oil change? the sluggish occurred when leading up to the oil change. Then right after the oil change the car was running fine again then a week later, it became sluggish again.

You may as well inspect and or replace the plugs anyway in case theyre stuffed
Its a process of elimination really,thats why I asked what else has changed or different which might contribute to the issue. Yea ill see how it goes. Another possibilities thay may cause this may be the sensors?

[dc2r-0636]

Go under ur car and shake ur cat, if it makes a rattley sound it may be blocked/melted. I had this problem

[blackdc2r]

yea no worries ill try do that. Could a possible Vacuum leak could be causing this?

[Bludger]

yea no worries ill try do that. Could a possible Vacuum leak could be causing this?
could be anything, check it all out.

might even be a placebo

[dekhere]

i have the same problem, let me know when you find out what was wrong =]

[Areis]

Fuel injectors?

[blackdc2r]

Fuel injectors?

I've tried using fuel injector cleaners and no difference at all sadly... :(

[1900-hustler]

can you list what you have done to date..

then we might be able to suggest anything else to look for

[Nuci]

+1 for placebo

A lot of people say that their cars feel a bit slower but unless you have it dyno tested to check for a drop in power it's hard to tell whether the drop is real or just you getting used to the speed of your car.

Does it drive smoothly? Is it hugely down on power or just a little bit?

[dc2screama]

Been through this problem,
Change the vtec solenoid and see how you go.

[Torell]

Sounds like a drop in responsiveness. That wont change ur dyno result.
My (non vtec) prelude does it occassionally. And a friends dc5 did it for the first time last week.

Id describe the differance in feeling ive experianced similar to the responsiveness loss from a cold engine to a warm one.
I dont believe it to be the oil, or the petrol in my circumstance.
Cos i feel it only sometimes, id rule out spark plugs. Im thinking sensors or something.

Does it happen for you constantly?

[dc2screama]

Me? Yeah it happens most of the time..

[jase89]

my suggestions would be

- o2 sensor - might be dirty or seen better days and on the way out?.
- Heat soak - from the weather were having recently?.
- overfilling oil - this can give result of sluggish acceleration, I had to drrain mine cus stupid mechanic overfilled it.
- fuel filter needs changing - this can contribute on acceleration aswell.
- Spark plugs? - whens the last time they changed?.. the recommend changing them every 15000kms or depends how often you drive.

I could give more suggestions although try goin through them one by one :)

[hmetro24]

I am having same problem lately, the car feel no power before 4k rpm, I think time to change spark plugs, and do a tune up for the car.
I think it's because of the warm weather, and heat soak.

[dc2screama]

You shouldn't have a problem with heat soak if you have the pod sitting right near the splash guard,
Can you retune the car with stock ecu?

[jase89]

thats incorrect it all depends on the density of air. If its humid and hot, Especially when the ground is cooking you can still get heat soak..

The stock ecu can be retuned and can adapt to your current setup..

[dc2screama]

Aite thanks mate

[Torell]

Sounds like a go. Will try above mentioned things and see how it pans out.