My G35 lossed some speed when accelerating. I changed the oil and got somewhat faster but something is still pulling at back. So changed the spark plugs not the wires. No difference. Idk if i got better at driving or forgetting a major tuning part. Feels like i have to force my car go faster. Adviceplz

 

Have you picked up some weight since you got the car?








I kid lol. No idea about the sudden loss of acceleration. Maybe you got used to the powah

 

Check your throttle body. Open the butterfly with the battery removed. If its dirty, clean it and you should get a bit of your speed back.

Remember, remove the battery. If you don't, you'll have to do the ECU Reset which is annoying.

 

How many miles? Clogged cats a possibility?

 

Ima check the throttle body and clean it and its at 102k miles

 

Possibly time for a new intake/filter? Recently got an intake installed and love the way it sounds the woosh sound is awesome!

 

Clean your MAF and replace your PCV valve. Both of these have to do with metered air and getting them up to snuff will correct air fuel ratios. Also, clean your TB.

 

ha ha, dont forget to check the flux capacitor.

 

Just soak the PCV (minus any rubber parts, if any) in carb cleaner and it is like new... No need to spend the extra cash.

 

Don't do that. Its not about it being clogged; the rattle test is a myth. There's a spring in the PCV that wears out, so even if it rattles it can be bad.

 

Did you have the computer read for codes? My car had a bunch of loss and the knock cable went bad, but no CEL. Replaced the cable gas millage went back up and so did the power.