Technical Car Experts Answers everything you need: car jerks while shifting

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Monday, July 2, 2012

2004 Dodge town & country: Jerks and Hesitates During Acceleration?

Vehicle Jerks,stalls and hesitates during acceleration.
It also makes Loud sound while starting from Exhaust.

The Sound noticed from muffler while start up.

First of all i will say,get the error codes retrieved.Is there check engine light coming up on dash board.

If there is Check engine light coming up on dash,then it confirms that there is definite error code stored in cars computer system.
But in some rare cases,the check engine light will not come up on dash,but still there is error code stored in computer system,its called ECM or ECU.

To know what error code is stored in cars Computer system,a tool is required.Its called OBD II scan tool.But if you dont have this tool,then there is one more way.
ITS called manually way of getting the error codes retrieved.

The simple procedure is as follows:---

Cycle the key from off to on three times ending with it on and watch the digital odometer display. Please note,Don't crank the starter, just off to on. The codes start with a P and have four numbers, there may be more than one stored. When the error code is shown,it will show "DONE" on display.
If there are no error codes stored then it will directly shown DONE on display,after you try the procedure.

If there are any code stored and its retrieved,then this error codes will help you to confirm what the problem is,so you can continue troubleshooting in that way.

But if in case the ECM is clear and no code is set then on that basic,the problem which you are facing has few possibilities.

The details about that possibilities are as follows:----

PROBLEM NUMBER 1:------

VEHICLE HESITATES AND STALLS/JERKS WHILE ACCELERATION

On this issue with no error codes stored in cars computer system,there are a couple things that are most likely to be checked and inspected.

One would be the EGR position sensor. On dodge town & country 2004 year model vehicle the position sensor is internal in the EGR valve and serviced with it. In most cases its seen that the sensor will fail and allow the valve to hang open when it should be actually closed and the engine controller still thinks it's closed. The engine can't tolerate EGR flow at idle or low speeds, so if the valve hangs open at these times then it will cause some hesitation and sometimes it can die at idle.Or you notice jerking and stalling issues. Replacement of the EGR valve would be necessary if the sensor has failed.In that case get the EGR valve and sensor checked.
The other common problem that can cause this issue is faulty/dirty worn out plug wires. The problem is noticed by others too.The plug wires on these vehicles had alot of problems with spark leakage to each other or anything they come in contact with. On this case There was also a service bulletin released by dealership service center for replacing the plugs, wires, and reprogramming the engine controller software for misfire concerns. I've routinely seen plug wires fail on these at 15,000 miles, but the replacement wires do last much longer.Always prefer to buy branded and reputable company parts.Aftermarket compatible parts are cheap but they dont last long.

PROBLEM NUMBER 2:---

LOUD NOISE FROM EXHAUST

There are a couple possible causes for exhaust being louder.

It's possible that there is a leak somewhere, or the muffler issue.If the muffler is replaced previously and its a aftermarket product ,then this parts don't last long and this can be one sort of issue for such loud noise.The muffler is used to lower /lessen the noise from exhaust while start up.If its worn out/old then it can cause such problem. I would make sure the exhaust is checked out for any leaks. If there are no leaks but the muffler has been replaced with an aftermarket one then you could have a factory one installed if the noise is objectionable to you.
If there are no leaks,then get the noise inspected at near by garage.If they tell you that the noise is normal then try to compare it to another like van to see if it's the same or not.If another van is not causing such noise,then exhaust system and muffler component needs to be checked by professional.This issue definitely lying somewhere in between there.

This details will help.

Thanks.

Users Who Viewed This Problem Also Viewed:

Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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Friday, May 25, 2012

2006 Dodge Caravan: Runs Rough, rough idle, hesitation, jerkiness in engine and stalling out?

Its a multiple issue problem.
First thing to inspect is Engine warning light ON dash.
Is the check engine light coming up ON dash or not.
If yes,then scan for error codes.
There are two procedure to scan error codes.
One is by OBD code reader scan tool and other procedure is manually without scan tool.

Luckily on dodge, we can do this without a scan tool.

Within 5 seconds, turn the ignition key on-off-on-off-on, leaving it in the on position(position just before cranking). Now look at your odometer readout. the fault codes will show up as 4 digit numbers preceded by the letter P.
example - P0455.

Once the error codes are retrieved,the problem will be pointed out so further troubleshooting can be carried out.

But if there is no check engine light coming ON,then its rare that there is any error code stored in ECM.

In that case,inspect the idle is drive as well as in park reverse model.
If the idle issue is there in all modes then as per that

the first possibility to be checked is a vacuum leak, restricted vacuum hose, or intake gasket leak.

This is how the system performs:------
When you depress the brakes or have the brakes engaged while at a light, the power assist is used which gets its vacuum from the engine vacuum system.
A leak or restriction in one of the vacuum hose combined with brake applied will reduce engine vacuum enough for rough running, rough idle, hesitation, jerkiness in engine or stalling out.
With AC on, the problem is even more pronounced as there is more load on the engine, which makes correct vacuum more critical.

A bad vacuum hose or intake gasket leak will cause this.
In this case First, the engine vacuum has to be tested with a handheld vacuum gage and then the system is propane tested to find the source of the leak or restriction.

The only other things would be timing being slightly off by a tooth and causing a low idle condition.
But if that's the case then it would normally set a fault code for the cam sensor and would set the check engine light. Or a burnt valve, which if the vacuum checks out, then an engine compression test should be done to see which cylinder(s) are low on compression to know where the valve issue is. But again, normally this sets a fault code for engine misfire and turns on the check engine light.

This details will help.
Thanks.

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FREE Car repair guide?
http://technoanswers.blogspot.in/2012/03/car-repair-guide.html

&
Complete Car repair Help FREE?

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Friday, January 27, 2012

Volkswagen jerks while shifting gears?

Check if your motor mounts are sloppy.

Slipping is usually caused by a stripped gear in the trans ,depending on what gear it slips on u can find the stipped gear.

Also inspect cable between transmission and engine.

Concerning Touran, i would check the oil level, it might be too high.First things to check would be oil level and the fault codes. There is no dipstick in the car for transmission oil, so the workshop will have to do it.
If you remove the battery ground cable, the fault codes can become not active, and let the car drive in all gears for some time.

This will help.Thanks.

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