imported_mugen_r

Hey guys, my friends car is having a odd problem with acceleration recently. When she's sometimes in gear 1-4, under 3000rpm the car seems to have a decrease of power/acceleration then it will pick up a bit after.

this issue started within the past 1 month or so, but it seems to be happening more and more now.

The engine is stock, no mods to it besides CAI. This problem started happening recently and it's just like the car is lacking fuel when accelerating so you get this 'shaky' feeling. Car is running on a full tank of gas, recently filled also.

I've changed the oil + filter, but that didn't do anything. I'm not sure what else to go after.

Timing has not been messed with at all and ECU is stock aswell.
-No CEL light
-idle is fine, everything seems normal till you start driving it

Any ideas on how to pin-point what the cause of this could be?

thanks!

chris_si98

so if you step on the gas.. it pauses, then it picks up? How long of a pause?

or

when you step on it there just is no power untill high rpm's?

imported_mugen_r

Correct...

It's like, you step on it and it will accelerate but it will seem to 'bogg' and not accelerate as it would normally.

It's odd because sometimes this will happen and sometimes it will be fine.

imported_kungfugrip

wow mine is doin that too when the idle gets stuck at 1500..

chris_si98

could be several things.. clogged cat, dirty air filter, etc.

Something is being restricted

imported_crazydragonclk

i have alsoo had this problem

imported_mugen_r

*had or have?

imported_2join performance

I too am having this problem. I have a feeling mine is related to the spark plugs though, as it has been a while since I changed them.

bbarbulo

iTrader: (2)

could be one or more of the following

weak spark (bad timing, bad distributor, bad wires or plugs)

that is all....

if it was a fuel problem or a clogged cat, it would happen higher up in the rpm range.... think about it, more RPM=more demand for fuel.... and if it was a clogged cat same thing.... higher air flow in higher RPM.

run your spark down and figure it out.

imported_doggy69247

i had the same problem i changed cap wires and put a blaser external coil in the car and i think it solved the problem i cant remember i sold the car like 3 days after



i have a dixxy from a 1.6 if u want 2 try it but im in newmarket

imported_plzbeleiveit

timing, plugs, wires, airfilter, clogged cat, dizzy.

bbarbulo

iTrader: (2)

oh also.... it COULD be an overfueling problem from like a bad engine coolant temp sensor or injector stuck open.

VTEC_Thunder

^^ Like he said...could need a tune up...maybe change the fuel filter too.

imported_Nanase

fuel filter changed recently? any vacuum leaks around the joins?

imported_mugen_r

Edit: Fuel Filter didn't fix the issue


Today I replaced the spark plugs with plugs from my b18b and the car runs great!

now the issue is fixed :P

hondaaa

mine too, except my eng. light is on. obd says its the o2 sensor. good luck

imported_gool

a civic i worked on had the same prob. it was the ign coil. I would check the resistance between the two primary terminals, and the resistance between the coil tower (secondary ter.) and primary terminals. compare with SPECS.

CoreyR

Tune up would most likley solve the problem.