YANG_JDM

I had some bad injectors in my h22 and replaced them with some used ones that I purchsed. The injectors that i purchased came off of a running car and i took them out myself and now the car bogs at low rpms. When driving the car it will bog and studder at low rpms til bout 3200rpm, but runs good at higher rpms. The car also bogs if cruising on highway. I thought it was my spark plugs so i replaced them and car still runs the same but after driving it for a long amount of time it will stop bogging, why? Any suggestions or help will be great.
Thanks

kevodean

yeah that happen to me, i clean out my throttle body and it still does it but it does it a lot less...also theres an idle screw where your intake goes into the manifold...i cleaned out my manifold and throttle body and it doesnt do it nearly as much, it use to do it everyday...but now it only does it once in a while when i drive a whole lot

YANG_JDM

Thanks, Iwill give that a try. Any other suggestions.

Duane_in_Japan

Clamp off the fuel hose where it runs back to the tank after the fuel rail, this is called dead head pressure and see if it clears up, it sounds like you are running lean in the low RPM range. Dont drive like this for long. Your O2 sensor may not be reading well until it gets hotter (higher RPM range) so the ECU does not know the correct amount of fuel to deliver???

Drive it in a lower gear so it heats up quicker and see if it clears up quicker, not while dead heading though. These are two separate tests. Let us know please.

YANG_JDM

Hi, thanks for the suggestions. I clamped off that fuel line after the rail and the bogging stopped. Now, how would i have to do to fix this issue

Duane_in_Japan

Do the second test, drive it hard to heat up the O2 sensor. Then drive normal, does the bogging go away at least for a little while then start again (O2 sensor cooled down again).

If it does not seem to fix itself during this test then go ahead and check fuel pressure, what is it during the bogging and during a good faster drive.

More to come.

YANG_JDM

For the second testing, when i push the car hard after a while the bogging will go away but soon comes back after driving normally. Another thing is if i start the car, let it idle for about ten minutes turn off the car and turn it back on it will also go away for a short time. I'm not sure what the fuel pressure is during bogging and good driving time because i dont have a fpr. Would I have to buy one just to see what this issue is?

Duane_in_Japan

Autozone should have a free loaner, how many wires on your Oxygen sensor and where is it located.

Can you please go into your "My Profile" and create a signature with your car info in it please.

unknownally

My car is doing it too.

It can be the distributor. My car wasn't running at all until I changed the ign rotor. Now it runs but sputters/bogs. Pretty sure I need a new cap or the whole dang distributor.

Messing with the timing also caused this for me.