Question about 2002 Honda Accord

3 Answers

Automatic transmission lunges slightly at 5-20mph starting up, if light on the pedal,no problem

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  • mjborzen Apr 02, 2011

    thats not an answer, for crissakes, what a waste

  • mjborzen Apr 02, 2011

    that was hedging, could be this, could be that, thats not even pointing me in a direction, give me a break, buddy

  • mjborzen Apr 02, 2011

    i need more specificity to call what i got an answer, i would call the answer i got a n old worn out blanket, something that tries to cover everythinbg, and just gets all stretched out and worn!

  • mjborzen Apr 02, 2011

    about 2 months ago, new fluid and filter in the transmission was done while the 105 grand was done, mainly the new timimg belt, and related stuff,like the water pump, fluid level now is right where it should be i checked this afternoon

  • mjborzen Apr 02, 2011

    the lunge when accelerating from start is about like one quarter or less of what the engine does when it goes into passing gear, that is, a slight acceleration that is not smooth and even

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If the lunge is a problem with the first shift(1st-2nd)then you are most likely at the beginning of the end.these transmissions develope small problems that create debris and clogs the filter.You may not notice anything until pressure drops in the transmission and the second clutches are damaged and by then it is too late.the filter is not a servicable item without disassembly of the transmission.If the surge is not a shift problem then it is most likely not a transmission issue but a engine drivability problem.You need to start with have the system scanned for codes at a repair shop so you can have some idea which direction to go in.Good luck!

Posted on Apr 02, 2011

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If you are saying it 'bangs' into gear if you give it any kind of aggressive petal on launch, you might have the beginnings of trans issues that might get expensive-has there been any maintenance done on this car, like a trans service where you drained the trans fluid and replaced the filter?(if applicable). If not, you should do this, as the symptoms you point to indicate a problem with a plugged or dirty valve body. Hondas use a specific trans fluid so make sure you buy it.

Posted on Apr 02, 2011

  • mike mountain Apr 02, 2011

    I wanted to add, since your description was not clear, if the extra petal causes the engine to race ahead of the speed you are traveling (slipping trans), that is real bad and you need to nurse it, accelerating gently so it does NOT slip-you will have to get the trans rebuilt if this is your issue, but if you are careful you can nurse it if necessary.

  • mike mountain Apr 02, 2011

    in reference to your comments, look at what you wrote-

    'automatic transmission lunges 5-20mph, if light on petal, no problem"

    that is about as vague as it gets 'buddy', can't goldplate....well, ya know...here's a thought, buy , another car that doesn't 'lunge", or, maybe just go 'light on the petal' then you'll have 'no problem'

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Thanks for choosing FIxYa and welcome to the sight. Usually, this could be a sign of low transmission fluid. Have you checked to make sure the transmission is not leaking fluid and the level is correct? Has it been awhile since you changed the transmission filter? If it always happens at low speeds, it may be fuel related or it could be a vacuum leak. A simple leak can cause the car to act up. Then again, the transmission may be damaged and need worked on.

Posted on Apr 01, 2011

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1 Answer

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I would think it has something to do with
Automatic Transmission Shift Lock Control System
The automatic transmission shift lock control system is a safety device that prevents an inadvertent shift out of PARK when the engine is running. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consist of the following components:
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• The automatic transmission park lock solenoid (Regal only).
• The automatic transmission shift lock control switch.
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With the ignition in the ON position, battery positive voltage is supplied to the automatic transmission shift lock control switch. The circuit continues through the normally-closed switch to the automatic transmission shift lock control and park lock solenoids. The transmission range switch provides a path to ground in the PARK position. With the automatic transmission shift lock control and park lock solenoids energized the shift lever is locked in the PARK position. When the driver presses the brake pedal, the contacts in the automatic transmission shift lock control switch open. This causes the automatic transmission shift lock control and park lock solenoids to release. This allows the shift lever to move from the PARK position.
Do the brake lights work ? If not could be cause by bad brake light switch .

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Hi Judy , what kind of vehicle do you have ? Year an model ? ABS light has nothing to do with it not coming out of park . Problem with automatic transmission shift lock control ! Probably !
The automatic transmission shift lock control is a safety device that prevents an inadvertent shift out of PARK when the ignition is ON. The driver must press the brake pedal before moving the shift lever out of the PARK position. The system consists of the following components:
?€¢
The automatic transmission shift lock control solenoid.


?€¢
The automatic transmission shift lock control switch.


?€¢
The park/neutral safety switch.

With the ignition in the ON position, battery positive voltage is supplied to the automatic transmission shift lock control switch. The circuit continues through the normally-closed switch to the automatic transmission shift lock control solenoid. The park/neutral safety switch provides a path to ground for the automatic transmission shift lock control solenoid in the PARK position. This energizes the automatic transmission shift lock control solenoid, mechanically locking the shift linkage in the PARK position. When the driver presses the brake pedal the contacts in the automatic transmission shift lock control switch open, causing the automatic transmission shift lock control solenoid to de-energize. This allows the shift lever to move from the PARK position. When the shift lever is out of the PARK position the contacts in the neutral safety switch open and the automatic transmission shift lock control solenoid is de-energized.

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1 Answer

Car surging


Is the car equipped with the Automatic Transmission?
If so, read on.
Otherwise skip to the end and answer some questions.

POSSIBLE SCENARIO:
I have observed a condition where my car surges slightly when the torque-converter clutch (TCC) cycles between lock and unlock when driving on an uphill grade.
First some basics and history that will explain why the TCC is used.

Engine, Torque Converter, TCC, and Transmission relationship--
The TCC allows for a solid connection between the engine and transmission which allows the input to the transmission to rotate at the same speed as the engine.
Without a TCC, there is slippage between the engine and automatic transmission. The slippage is greatest at low engine RPM. That is what allows the engine to run with the automatic transmission in gear, like when you first shift into gear or stop at a stop sign. When the throttle pedal is depressed, the engine RPM begins to increase and the torque converter begins to slip less and less the more the engine RPM increases. The car moves. But even at cruising speeds the torque converter slips slightly. Engine RPM is greater than transmission input RPM, which is realized as slight decrease in fuel efficiency.
When acceleration is complete and a constant speed is being maintained, the engine power output is reduced to the point where the TCC can engage and eliminate any slippage between the engine and transmission. If the car has a tachometer the engagement of the TCC can be verified when a slight reduction in engine RPM observed without a corresponding change in vehicle speed.
One method used to test the operation of the TCC is as follows:
Find a flat section of road where it is safe to perform the test.
Reach a steady speed and keep the gas pedal depressed with one foot. While observing the tachometer (or listening for an increase in engine RPM), with the other foot depress the brake pedal enough to activate the break light switch but not enough to engage the brakes. When the brake light switch activates, the TCC receives a signal to disengage. With the gas pedal being held steady, release the brake pedal and the engine RPM should decrease when the TCC engages.
Old cars with Automatic Transmissions did not use a TCC. I believe the TCC was put in use in an attempt to increase fuel economy.

MY EXPERIENCE WITH SIMILAR SYMPTOMS
The condition that causes that issue on my car is this:
- A slight uphill grade increases the load on the engine.
The car tends to gradually slow and it is necessary to depress the gas pedal to maintain speed.
- Depressing the throttle pedal (manually, or automatically with cruise control engaged) signals the torque converter clutch to unlock when the load increases slightly. (A more drastic load increase would signal the Transmission to downshift to a lower gear.) The corresponding increase in engine RPM and output is enough to compensate for the reduction in speed. When the vehicle speed, engine RPM, and throttle position stabilize to the point that the TCC will engage and the engine RPM will reduce in correspondence with TCC engagement. Now, if the road conditions have not changed, power output is not enough to maintain vehicle speed. With the increased load caused by full engagement between engine and transmission, and the cycle (surging) repeats itself until the road conditions change.

Does that help?
If not:

QUESTIONS
Please define the symptoms.
What are the road conditions when the surge occurs? (A slight uphill grade?)
What is the frequency of the surge?
Does the engine power output have a noticeable surge?
Is there a speed change related to the surge?
Does the tachometer move up and down with little or no change in vehicle speed?
Are all instrument indication in the normal range?
What else has changed?

Good luck!

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1 Answer

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