Q: Caravan won't run when I hit the gas pedal.

asked by on January 19, 2017

About 3 months ago van started to misfire, shaking at 40-50 mph, used to run without effort at 180 degree angle, anything less will cause engine hard knocks. Scanner read engine misfire and then fuel injector #1 circuit, same for #3 and #4. Spark plug #4 was burned, none of sparks plugs had oil residues. Replaced spark plugs, sparks plugs wires, ignition coil, TPS, Crankshaft sensor, engine and transmission mounts, fuel pump, air filter element and PCV Valve. Performed 3 test: 1) Cylinder compression (the larger difference between cylinders was -5. Passed. 2) Fuel injector test (with a stethoscope-like tool), all the injectors were opening (clicking sound) and 3) a vacuum leak test using a smoke pressure machine. No leaks were detected. After the tests I was driving home and the van did not respond to the gas pedal. It starts and run slowly until I hit the gas pedal, it chokes like if there is no fuel pressure or no air intake. HELP!

My car has 190000 miles.
My car has an automatic transmission.

Hi there. Check for fuel pressure on the fuel rail with the engine running. If the fuel pressure is at 50 psi or higher, then the fuel pump is working. If the fuel pressure is low, then the fuel pump may not be functioning properly and would need replaced as the fuel filter is on the bottom of the pump and it may be clogged. If there is no pressure, then either the fuel pressure regulator has failed or the fuel pump relay is not coming on. If the fuel pump relay is clicking on, then check the fuel pressure regulator and see if it’s sticking. If the fuel pump relay is not clicking on, then remove the relay and see if there is power to the relay base. If there is power to the relay base, then the relay needs replaced. If there is no power to the base, then check the fuse to the fuel pump. If the fuse is good, then there is a break in the wiring from the relay base to the ignition switch. If there is power past the relay, then there could be a break in the wiring between the fuel pump relay and the fuel pump. If the fuel pump is working properly and you have good pressure, then the issue would be with the throttle pedal position sensor (located on the gas pedal). You can try to resetting the sensor by the following:

  • Turn on the ignition key to the ’ON’ position
  • Step on the gas pedal to the floor slowly
  • While the gas pedal is on the floor, turn the key to the ’OFF’ position
  • After about a minute, turn the key to the ’ON’ position
  • Slowly release the gas pedal to the full rest position
  • Turn the key to the ’OFF’ position

Now you can turn on the engine and check to see if the gas pedal response is working. If the pedal responds and the engine revs up good, then the issue is with the throttle pedal position sensor. If you need further assistance with your engine not throttling properly, then seek out a professional, such as one from Your Mechanic, to help you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Car making loud noise and barely running.

This sounds like it could be a serious problem for your car. My first recommendation would be to have this vehicle inspected by a certified mechanic as soon as possible to avoid these symptoms turning into larger problems. The list...

My 2007 Dodge Caliber ACT won't shift out of lower gear, the temperature light and check engine light came on with a code of P0172

Hi There, This code relates to a rich fuel condition. This can be caused by a faulty mass air flow sensor, a bad fuel injector or a faulty coolant temperature sensor. In your case since the temperature light came on,...

Cat below bank threshold bank2

Hi, thanks for writing in. If you are experiencing a code related to catalytic converter failure I would recommend having your catalytic converter inspected by a local exhaust professional. Once you have determined if your catalytic converter is failing, I...

What are the signs my Timing Chain needs to be replaced?

Hi there. The noise that you are hearing could be either the timing chain or the variable valve timing solenoids. If the sound is constant and rattles easy and does not bog down the engine, then the timing chain is...

Fuel and temperature gauge needles stopped working

Hello. We will be happy to assist you. I believe that the entire instrument cluster may be faulty. It is highly unlikely that nearly all of the gauges will fail at once. I suggest that you have a technician inspect...

I am having trouble starting my 2007 Dodge Charger and it does not have good acceleration

Hello. There are a lot of things that can cause this on your vehicle. I would usually start by scanning the computer for any codes. If there are codes set it can help to find the issue. If there are...

Compass stuck on N with CAL (solid) indication

Once you get to a clear parking lot that you can make some tight circles without a problem put the compass in CAL mode and then go slow in tight circles for three to fut times or until the CAL...

How do i reset the computer after i change the crank shaft position censor?

To reset the check engine light you can disconnect the battery via the negative battery terminal and let the vehicle sit for an hour before reconnecting the battery. This will drain all of the power from the electronics and clear...

How do I set the memory seat and other memory settings?

If equipped, your vehicle can hold two different memory settings at any one time. These settings can control seat position and angle, pedal position, radio station, and side view mirror adjustment. They can also be operated with the remote keyless...

Related articles

The Most and Least Expensive Cars to Insure
Car insurance quotes depend on the car make and model. The Honda Odyssey is the least expensive and the Dodge Viper is the most expensive to insure.
The Best Used Cars to Buy If You Have 3 or More Kids
If If you have three or more kids, you could probably get by with a mid-size sedan if all you want to do is take them from Point A to Point B. Realistically, though, having kids means music lessons, athletics,...
A Buyer’s Guide to the 2011 Dodge Nitro
While While the Nitro shares some typical crossover features with competitors like the Equinox and even Dodge’s own Journey and Jeep Liberty, what it doesn’t share is typical conservative styling. This boxy beauty (or beast, depending upon your point of...