Slow Speed Bog in 2.4 [Archive] - Forum


View Full Version : Slow Speed Bog in 2.4

04-04-2004, 02:46 PM
Re: 1996 Grand AM SE with a 2.4/auto combo.

Recently went past 100K miles (bought at 50K).
We have noticed that it is starting to have a little
bog when starting to move from a start. This is
most niceable when it is cold and when turning
from a stop. Slight hestitation right at the start.
Runs like a top after the slight stumble.

Replaced the plugs (coil on plug, so no wires).
That did not seem to really help at all. I guess
their might be a sensor or two that I could swap
out since the mileage is getting up there lately?

No warning lights. Although I am getting a new
laptop, so I might plug in my OBD-II software to
see if it has anything interesting listed.

04-11-2004, 05:55 PM
I had a friend who used something good to clean
out the injectors on his Mustang. I might try that.
Forgot what he used, but it was something that is
different from the usual injector cleaner that I use.

Any sensors that might be dirty or faulty that would
cause a hesitation off of idle from low speeds when
the engine is cold?

04-11-2004, 06:51 PM
I agree. Sounds like a fuel delivery issue. Have you changed your fuel filter lately? Have your injectors been cleaned?

edit: It couldn't hurt to inspect your TPS as well.

04-12-2004, 09:01 AM
I have a 5 speed and mine did the same thing. I had a full fuel system cleaning, new filter, and new pump put in. Took car of the problem. From my friend with an auto like yours, she also had the trans fluid changed and no more bog. Make sure you are running a GOOD fuel injector cleaner every oil change. (hopefully you are changing every 3000mi) that will also help you out in the long run.