When on the freeway (or surface streets) when accelerator is pushed hard, car hesitates and almost bucks. Seems to be only when use of overdrive gear is necessary or excessive fuel is needed. Have had complete tune up with plugs/wires/fuel fiter. Fuel pump is only 30,000 old (car has 71,000). Gears seems to shift smoothly under normal driving conditions leading me to believe it's a fuel issue as opposed to a transmission issue (could be wrong). Similar situations seem to mention the Mass Airflow sensor. Could that be my problem?
Do you have a OBD meter? Probably some sensor will show a flaw. You can buy one from Walmart for around $20.
At least here, In South Florida, Some Auto parts stores will either lend you one(requires a deposit) or do it for you.
Of course you can take it to almost any shop who will use a more elaborate machine, then fix it.
Any codes? Do you have coils?
SOURCE: Bucking on Hard Acceleration
You best bet would be to look for the vacuum diagram and just take a day to make sure all of the lines to the engine and tranny are all correct. If its not it and while bucking the car feels like its going to turn off on you then it maybe a fuel delivery problem.
SOURCE: hard shift and blinking overdrive
The blinking overdrive button is telling u that a serious fault has occurred in the electronic controls or a mechanical fault such as excess slippage is occurring.
SOURCE: '89 f150 4x4 AOD doesn't like overdrive
get the truck where you can service it and have a transmission service done this will include: new fluid and transmission filter
because it sounds as if it has not been changed in awhile open the hood and if the transmission fluid smells cooked change it right away
SOURCE: 2001 Ford E150, V6. Stutter/hesitation upon
Have the throttle position sensor checked, might be faulty.
ENGINE HESITATES WHILE ACCELERATION
LOSS OF ACCELERATION
It
can be fuel pressure issue or it's the problem with accelerator pedal or its
clogged filters causing there.
There
are many other possibilities. I suggest you to go through the list of help
links mentioned below, these will help you to confirm where the actual fault
lies: -------
-----------
http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html
---------
http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html
--------
http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html
-------------
http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html
--------
http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html
---------
http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html
---------
http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html
--------
http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html
---------
http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html
--------
http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html
-------------
These details will help.
Thanks.
ENGINE HESITATES WHILE ACCELERATION
LOSS OF ACCELERATION
It
can be fuel pressure issue or it's the problem with accelerator pedal or its
clogged filters causing there.
There
are many other possibilities. I suggest you to go through the list of help
links mentioned below, these will help you to confirm where the actual fault
lies: -------
-----------
http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html
---------
http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html
--------
http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html
-------------
http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html
--------
http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html
---------
http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html
---------
http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html
--------
http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html
---------
http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html
--------
http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html
-------------
These details will help.
Thanks.
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