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Throttle Response Delay. View Member Profile. Feb 11AM. Post 1. I have a XC60 T5. Yesterday I came across a situation that was bad enough to cause an issue. I was driving up a hill nearing the peak and there's a slip road that allowed me to do a U turn. I came into the slip lane and nearing to a stop I saw no oncoming vehicle and did a u-turn.
About almost 5 seconds has passed and an oncoming vehicle has now started to head my way Has anyone else encoutered no throttle response or Hugh delay in certain situations? I think in this situation I have yet to try to replicate the issue but wanted to know if anyone else had it.
Post 2. Feb 12AM. Post 3. I have only driven just over kms and car was only delivered new in July After that incident on they way home that day I didn't have it occur but than wasn't exactly doing the same U turn.
What could be the problem? Thank you. It sounds like you may have an issue with your throttle position sensor. This sensor sends a reference voltage to your power-train control module, which uses that to determine ignition timing and fuel trims.
If the power-train control module is not detecting the proper signal from the throttle position sensor, the engine may not accelerate properly.
I would recommend having your throttle body inspected by a qualified mechanic, such as one from YourMechanic to determine why your car is slow to accelerate.
Explain your symptoms and have the mechanic drive the vehicle to verify the issue. Andrew Quinn Automotive Mechanic. Thank Andrew. Was this answer helpful? Thank you for your feedback! Sorry about that.
Why wasn't this information helpful? Recommended Services. The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details. Related Questions. My car is skipping. How to change a fuel filter in a Nissan Quest? How can I fix a ticking noise coming from the engine to my Pontiac torrent ?
Car jerking when switching gears by Yvonne R. Car hesitating on acceleration. Home Questions. Year I don't know. What others are asking 93 Buick will not excelerate passed 30 put in new transmission hose and radiator. Can u please tell me what u think the problem is Hi there. In some cases, when you have acceleration problems after changing a transmission hose, the issue is related to either an obstruction in the transmission fluid lines or the torque converter not receiving or having enough transmission fluid slipping Read more.
IT'S really cold out, had to be boosted when the warning appeared. There will be stored trouble codes that need to be read and cleared. With any luck, that will be all there is to it. When you try to start a car with a dead battery, it really confuses the electronics This causes the valves inside of the ABS hydraulic control unit to move up and down very rapidly. It is possible that you Related articles.By fuelsaverMarch 27, in Electrical, Electronics and Lighting.
Symptoms of a Bad or Failing Throttle/Accelerator Pedal Position Sensor
While driving the truck down the highway or city streets the throttle will soose response and go to idle for about ten seconds or so. Or if your sitting at the lights ready to make that left hand turn the throttle will not respond just goes to idle Note ecu is located on the left side of the engine. The only time now we see the engine light on is first thing in the morning while the ecu is testing it.
When this happens does to engine stay at rpm's or does it go to rpm's.
If the throttle pedal is bad it usually gives a code or if its the J link the engine idle is and the throttle wont work. I would try a new pedal anyway even without codes it could be bad. Heres parts of an email I got from the Mack enginners years ago even though your is not a CV or CT it could still have this jumper. Had an issue with throttle cut out on a CV chassis.
Found the problem to be poor connection on jumper at the body builder connection.
Volvo with ISX throttle pedal fault
Spoke with Dave Troupe in Allentown and verified the purpose of the Jumper to be for installation of Remote throttle control by Body builder. The jumper wire is to keep the throttle in operation until the body builder is done. If there is no remote throttle control installed then the jumper stays there.
If there are complaints of throttle pedal cutout and codes check jumper wire at body builder harness behind right side lower kick panel by the VECU. This jumper wire tends to have a bad connection and will cause throttle codes. If bad cut the two wire ends and solder them together and cover with heat shrink. Do NOT remove tags from wire. You can post now and register later. If you have an account, sign in now to post with your account. Paste as plain text instead.
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Recommended Posts. Posted March 27, Hello everyone i am new here and looking for some help and to find out if this is a comon problem on these trucks. We have scanned the engine for codes. Share this post Link to post Share on other sites. Join the conversation You can post now and register later. Reply to this topicWelcome to world's most trustworthy automotive forum. Thread Rating: 0 Vote s - 0 Average 1 2 3 4 5.
Volvo with ISX throttle pedal fault. Reputation: Pedal voltage faults. All diagnostics and schematics show two 3 wire plugs going to the pedal. This volvo truck has a single 5 wire plug going to the pedal and I can't find any wiring information to show the volvo wiring.
The pedal plug has wiring A-E. The pedal plug has wiring A-E VN volvo. That's the best information I have on this truck so far. Found the throttle pedal circuit and circuit numbers. Ugly layout for a PDF though but it's better than nothing. See page 11, the accelerator pedal circuit and its wiring reach the VECU. Correct me if I'm wrong. You are correct. I'm offsite right now trying to diagnose. This is a long term project that originally started with a transmission unable to shift problem.
No previous repair history before it came into the customer shop. Pedal was replaced. VECU was replaced. ECM was replaced. Circuits from pedal to VECU have been load tested. Circuits from from ECM to firewall have been loaded tested. The only circuits not tested yet are VECU to firewall.
Using Insite, the ECM always sees the throttle as off idle. Nothing I try changes that. That's probably why the transmission has shift problems. Transmission is Meritor. I told my boss to recommend taking it to Volvo.
Truck is sitting at customer location and not our shop. Make sure the pedal sensor was replaced with the correct one. VECU is just switching ground at the idle validation control wire. I didn't have anything to do with the parts replacement. That's just the stuff they already replaced before I got there. They would have ordered the pedal from the dealer by VIN. Since it already had that fault when it arrived at the shop, I would assume they used the VIN and not the part number on the old pedal.
Would an incorrect pedal still allow the TCM to show proper pedal position and idle validation? Even though all the ISX schematics show a 6 pin pedal connection for two 3 wire circuits, the Volvo schematic shows the proper 5 pin wiring including circuit numbers for this truck.
It only takes a minute to sign up. It just doesn't work, as if I weren't even pressing it and it happens regardless of the speed. I have to turn the engine off and on again and it'll work for another 3 or even up to 20 minutes sometimes before failing again. I've changed the oil and gas filters and all the four spark plugs, as well as the oil.
I've also cleaned the injection system and the problem is still present. I use unleaded fuel only at 88 octanes. By the way the catalytic converter notice led is always turned on, and it only turned off like 2 minutes after I changed the sparks and it hasn't turned off since. I've just noticed that the revs get stuck right at the moment the issue occurs. I don't know how it's called but it's like a small golden dented ring that just sticks to the axle and without it the speedometer doesn't work the speed needle would just stay at 0.
If so, the gas pedal rheostat is probably telling the computer you are pressing it, causing the throttle to go up and in some cases not respond at all. You may also try tromping on it a couple of times with the engine off. This is the first thing I would have tried as well. With the car off, go under the hood and look near your air filter housing. Follow the large hose that it is connected to until you see the throttle body.
Try manually moving the throttle lever. This is what your gas peddle would do anyways. Also try using two people, one to be in the car pressing the gas peddle, and one to see it the lever rotates at all. If all checks out, investigate your throttle position sensor. The TPS can be a cause of engine stalling while driving or idling.
I had the same issue.
Symptoms of a Bad or Failing Throttle/Accelerator Pedal Position Sensor
My Vibe would always start, but would only run at low idle and depressing the throttle had no effect.The days of having to constantly adjust the throttle cable due to a loose nut on the carburetor are long gone. Today's modern cars, trucks, and SUVs are all equipped with an electronic throttle control system that contains an accelerator pedal position APP sensor. This sensor's primary job is to monitor the position of the throttle pedal and send an electronic signal to open the throttle body as you depress the gas pedal.
Although this device often lasts the entire lifespan of your vehiclethere are occasions when it will fail, wear out, and need to be replaced. The APP sensor essentially tells your engine how fast or slow to drive when you press the gas pedal. The primary reason why this part fails is due to exposure to high heat, as it's typically located on the floorboard next to the firewall of the vehicle, in very close proximity to the engine.
Unfortunately, this part can't be repaired, so when a certified mechanic determines that there is a problem with this device, you'll have to replace the accelerator pedal position sensor. Like most components on the vehicle, a bad or failing APP sensor will display a few warning symptoms including triggering error codes, warning lights and a few physical symptoms that should alert the driver that a problem exists.
Listed below are a few of these warning signs. When you press down on the gas pedal, your engine should respond directly and instantly. However, when a problem with the APP sensor exists, the vehicle's ability to consistently accelerate or decelerate as directed by the driver is reduced.
This could cause a serious safety hazard, as the driver is not able control the speed or acceleration of the vehicle.
When this occurs, you should pull your vehicle to a safe place off the road and contact a mechanic as soon as possible to inspect why throttle control is not consistent. When the APP sensor is not functioning properly, it will also cause problems with fuel efficiency. Besides monitoring and applying throttle pressure to the throttle body, it also helps stabilize throttle control. It's designed to take input from the driver, but steady the application of fuel pressure as it relays the information from the ECU to the throttle body of the vehicle.
If the sensor is not able to transmit this information to the ECU correctly due to a loose wire, being worn out, or broken entirely, you'll notice a huge difference in fuel economy. This will signal the Check Engine Light to illuminate on the dashboard.
Anytime this light is on, you should take it seriously as there are multiple components that will trigger this warning light. Contact a local ASE certified mechanic if the Check Engine Light comes on so they can properly diagnose the problem and correct it quickly. In order to work properly, all of the sensors inside your car must function at percent efficiency.
When the APP fails, it impacts the operation of the entire vehicle. Anytime you notice any of the above symptoms or warning signs, you should contact a local ASE certified mechanic through YourMechanic. Our professional and experienced automotive technicians can travel to your home or workplace to complete diagnostic inspections and repairs of virtually any mechanical or electrical problem with your vehicle — including replacing the APP sensor.
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Schedule Vehicle Engine Electrical Inspection. Service Area. Average rating fromcustomers who received a Vehicle Engine Electrical Inspection. Engine response is inconsistent When you press down on the gas pedal, your engine should respond directly and instantly. Engine does not run efficiently When the APP sensor is not functioning properly, it will also cause problems with fuel efficiency. Home Articles. The statements expressed above are only for informational purposes and should be independently verified.
Please see our terms of service for more details. Related Articles. Related Questions. Check Engine Light came on. Car also has problems cranking but only when I refill it with gas.Log in or Sign up. Find Trucking Jobs. NO Acceleration. Aug 6, 1. I have Volvo and I when I press the gas pedal there is no acceleration. I already checked and replaced the relay sensors but that wasn't the problem. I also checked and replaced the pedal sensor but the truck still wont accelerate.
NO Acceleration. Volvo 2006
The engine turns on, my truck is on, it just wont accelerate forward. It says to check the light modular. What could I do? What is wrong? EddieBellVolvoAug 6, Yes, let employers and TruckersReport text me with new opportunities, job alerts and other career information to the number I provided.
There is no charge for this service, but standard message and data rates may apply. Aug 6, 2. Injectors maybe. HalpinUoutAug 6, EddieBellVolvo Thanks this. Aug 6, 3. He says GAS pedal, maybe he gas in dem diesel tanks. FajoAug 6, Aug 6, 4. Aug 6, 5. Aug 6, 6. VilhiemAug 6, Aug 6, 7. Aug 6, 8. Aug 6, 9. Vilhiem Thanks this. Aug 6, Show Ignored Content. Draft saved Draft deleted.NO THROTTLE RESPONSE
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