Question about 1989 Ford F 250

1 Answer

F250 5.8 fi engine surge when placed in gear

Engine surge when in gear and the gas pedal is pushed down past a certin point like over 1/4 throttle could this be TPS?

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

Check all your vaccum lines.

Posted on May 10, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Gas pedal malfunction. must press down further to gas engine


have a look at the cable for the throttle it may not be set correctly at the throttle body easy to do its just a turning knob that ajust it

Jul 06, 2014 | 1994 Mercedes-Benz C-Class

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!

May 24, 2014 | Subaru Impreza WRX STi Cars & Trucks

2 Answers

Gas pedal has a hard spot.


First try moving the the throttle cable by hand at the throttle body. If that is free, examine the other linkage components for binding.
If the throttle is still stuck is likely that the throttle valve is sticking in the bore.
Remove the intake hose from the air cleaner and see if it is gummed up in there. You can use some carb cleaner to clean it. Do this with the engine running and where smoke from the tail pipe won't upset your neighbors.
If it is not gummed up, then likely the throttle butterfly has worn the throat of the throttle body and is seating itself too tightly. Time for a new throttle body.
Good luck

May 13, 2014 | Dodge Ram 1500 Cars & Trucks

1 Answer

Idle surge with foot on brake


If it only happens when you are pushing on the brake pedal, the power brake booster could be leaking engine vac.

Mar 12, 2014 | Dodge Stratus Cars & Trucks

1 Answer

Gas pedal wont go down once in gear


I would check a few things. first the engine mounts. make sure the engine isn't rocking over. second cruise control ? if it has cruise control I would unhook the cable to the throttle from the cruise control and see if that was the issue. some times the control box will pull in deceleration mode and stick there. also the decelerator valve on the throttle body may be defective.

May 24, 2013 | 1998 Dodge Neon

1 Answer

Is a Throttle Position Sensor the same thing as a Transmission control Module


The TPS ( THOTTLE POSITION SENSOR) tells the engine computer and trans how far you are pushing the gas pedal. Its mounted on the side of the thottle body. It will make the engine surge if it is failing. Have replaced this part many times for this problem. TCM (TRANS CONTROL MODULE) control trans shifting. The tps is and one of the input sensor for shifting.

Feb 03, 2012 | 2004 Jeep Grand Cherokee

1 Answer

Gas throttle not working. Found loose part that connects pedal to


Turn car off, push the round throttle under the hood all the way open. Route cable on top and put in the hole, release throttle. That should be about it.

Feb 17, 2009 | 2001 Lincoln LS

2 Answers

Accelaration Trouble/Loss of Power


I'm still awaiting a solution from your team. All I got was a solicitation to join a premium plan. Why would I join a premium plan if you can't provide solutions to my problem.

Jan 20, 2009 | 1996 Nissan Pickup

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

100 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

77499 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22306 Answers

fordexpert

Level 3 Expert

5626 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...