My fit is fit ge. Mileage ard 120 000 km already. I have change the air filter, new spark plug, fuel filter, service engine oil and atf, atf filter, but still my car wont accelerate well. Anyone have this problem? I can get fast around 100mph but slow acceleration. No CEL on. No jerking. When i disconnect the MAF, then drove the car, when it reach 100kmh then the engine will jerk and goin normal again.

 

If you cant get to 4000rpm. Maybe vtec solenoid is broken

 

The rpm can go up above that. But it would be slowly not like before where it used too

 

maybe you have engine block leaks or you have bad fuel injectors

 

Im nt sure abt engine block but i have pour some injector cleaner into my tank. Seem no improvemnt

 

Bad wheel bearing. Stuck brake caliper. Valve adjustment. Fits don’t accelerate that quickly, have you driven another to compare?

 

Yes when first i buy this car, the throttle feels very smooth. Then not long after around 20k mileage after that, i can feel my fit like losing power. Yes i can go up to 160kmh but it will take more time compare to before. My hunch is the fuel or the air is not enough but i already clean the throttle body and replace the air filter. Seldom i will smell the gas from the exhaust when i start my car at the morning. It seem like the mixture is too rich maybe. Im not sure if coil pack is the problem because GE seems no issue with coil pack unlike GD. Or am i wrong? Im not goin to change the spark plug anymore cos i already do it and nothing happen

 

I ask the mechanic and he told me not to do valve adjustment because no weird noise coming from my fit head.

 

I am in boat with you Mario. Little less power than before, occasional gas smell. Previously i fix gas smell by tightening spark plugs and I check them regularly now, so this is no longer issue and the risk of plug blowout is low now, but the symptoms persist.

I concur that valve adjustment may be useful, but only worth effort if you feel problem is severe.

 

Yes bro. But no check engine light comin on. How do we know what is wrong right. I do want to try and error but it involve a lot of money.
The valve adjustment. My mech said that i dont need to do that because no weord noise and do not open the valve cover because to keep its originality frpm the factory.

 

there's also this? maybe relevant? (something causing the wheels not to spin freely)

 

Likely time to change the ignition coils.

 

Yup i think its the coil. I will tell u tge result later. That thing is nt cheap since im broke hHaha

 

Always worth a listen when this one talks.
talks.
I'd be more inclined to check steering, suspension, alignment. A screwed up alignment on the fit can weigh you down like havin two passengers. Now living in GA with some roads worse for wear (stupid on/off ramps for freeways especially) I'm getting familiar with a local alignment tech.
Just food for thought, that performance isn't just power but also a lack of resistance. Also I do believe this car doesn't have a formal fuel filter, so reason to believe you're driving a Fit from a different market which may be subject to different flaws. I wouldn't pour money into anything until checking that stuff out.

Edit: Valve adjustment isn't subject to only failure/noise. Properly adjusted valves can open real nice and give more power to her. Theres an acceptable range they can operate within. Though I can't recommend it to someone who won't tend to their car regularly and recognize faults, leaning toward the more open side lets more air in and exhaust out.

 

Ok that would be nice.tq for ur concern bro.

 

That’s bad advice. Tight valves do the most damage and they don’t make noise. They also can cause powerloss. Loose valves are noisier and if anything running slightly loose will give you more power.

If you haven’t done it already, check your spark plugs to ensure one or more of them are not loose. If all is well there, consider checking valve clearances.

 

A plugged cat converter could also cause loss of power.

We see a lot of posts here on tight valves so that can't be ignored.

Maybe have a second mechanic take a look rather than expensive parts guesses.

 

Novws, I’d like to know what you mean by “tight valves do the most damage”?

I do suspect my valves are out of adjustment. Unfortunately I have limited ability to take the time to open up the engine based only on speculation - there’s no smoking gun symptoms- since this is our only car.

 

Your transmission could also be sliding

 

Effing exhaust leaks can cause power loss too. so can air leaks.. Screw up reading at an o2 sensor, make the car think its lean or rich..
just did the kinda lame trick of using a shop vac to pressurize exhaust on our new to us 09 tacoma from texas/north carolina.. pinholes in the muffler.. some bad seals.. roads mustve must salted at some point. anyways, definite power loss in the truck if you live in rusty places this might be a consideration.. easy to test.

Valves can also be done in a day. get the car inspected when you can :{