I own a Corolla 2003 model, I take care of it very well cuz it's my only car,

I went to fuel at a station close to my house before I parked on an evening I return from work, only to start my vehicle that always has a smooth sound the next morning to hear it jerk seriously.

It cleared overtime from jerking at stationary, only to jerk when I engage the gear to move, and also jerks and stalls on motion when I drive in the morning,

It doesn't respond promptly to truttling , when you throttle, it stalls, pick and drop,
And when I engage a/c, it gets worse.

Mechanics have services nuzzles, injector and injector pipes, fuel pump strainer has been washed, (even though it was not dirty) plugs has been cleaned, but the problem still persist.

Pls I need help expert in the house, wat more shall I do?? wat could be wrong with my vehicle cuz it's giving me sleepless night??

Help pls

I wonder how you guys just start doing trail and error instead of scanning the car for error codes.

It's possibly a fuel fuel pump problem. You'll need to change your pump

izaac23:
I own a Corolla 2003 model, I take care of it very well cuz it's my only car,

I went to fuel at a station close to my house before I parked on an evening I return from work, only to start my vehicle that always has a smooth sound the next morning to hear it jerk seriously.

It cleared overtime from jerking at stationary, only to jerk when I engage the gear to move, and also jerks and stalls on motion when I drive in the morning,

It doesn't respond promptly to truttling , when you throttle, it stalls, pick and drop,
And when I engage a/c, it gets worse.

Mechanics have services nuzzles, injector and injector pipes, fuel pump strainer has been washed, (even though it was not dirty) plugs has been cleaned, but the problem still persist.

Pls I need help expert in the house, wat more shall I do?? wat could be wrong with my vehicle cuz it's giving me sleepless night??

Help pls

Most likely the filling station where you bought fuel sold bad fuel.
Get fuel injector cleaner from a genuine filling station and pour into your fuel tank and fire the car on the highway for an hour and see if it will cleanse your fuel pump, injectors

Onyeka90210:
I wonder how you guys just start doing trail and error instead of scanning the car for error codes.

I took it for test, I think the guy cud not even see the main problem, but he scammed my 5k and said that I shud go and service the strainer cuz it shows strainer is dirty, after that I shud drive the fuel till it finishes completely and go to a certain filling station he recommended that has the best fuel and buy fuel from there, which I did all that, but the problem persist.

Nbote:
It's possibly a fuel fuel pump problem. You'll need to change your pump

A mechanic tested the pump and said that it's still good, I don't know how true that is, although the car work perfectly after being driven for some time

ipobcannibals:
Most likely the filling station where you bought fuel sold bad fuel.
Get fuel injector cleaner from a genuine filling station and pour into your fuel tank and fire the car on the highway for an hour and see if it will cleanse your fuel pump, injectors

I have driven all the fuel to the last meter hand and bought a full tank again, but to no avail.

izaac23:


I have driven all the fuel to the last meter hand and bought a full tank again, but to no avail.

I say buy a bottle of fuel injector cleaner from a filling station and pour into a full tank, then fire it on the highway to clean out dirt from your injectors/fuel pump.
A fuel injector cleaner looks like this:

izaac23:


A mechanic tested the pump and said that it's still good, I don't know how true that is, although the car work perfectly after being driven for some time

Your fuel pump might still be good, but it’s clogged up with dirt and not pumping enough fuel, that’s why you’re experiencing stalling. Buy the fuel injector cleaner from a filling station and pour into a full tank, then fire the car on the expressway.
Also, check your air filter and change it if it’s dirty to allow air flow freely in and out of your engine. Do these and see the difference.

izaac23:


A mechanic tested the pump and said that it's still good, I don't know how true that is, although the car work perfectly after being driven for some time

When your fuel pump is bad, it still works but begins to act up when it gets hot. For some cars you'll need to open your fuel tank for a while for the car to even start again after it's worked for a while. Like someone stated, you bought bad fuel somewhere and that brought the problems from the pump. Get an injector cleaner as well bur you'll need to change your pump

ipobcannibals:
Your fuel pump might still be good, but it’s clogged up with dirt and not pumping enough fuel, that’s why you’re experiencing stalling. Buy the fuel injector cleaner from a filling station and pour into a full tank, then fire the car on the expressway.
Also, check your air filter and change it if it’s dirty to allow air flow freely in and out of your engine. Do these and see the difference.

Alright, I will do that and report back, thank you for your suggestion

[quote author=Nbote post=129241171]

When your fuel pump is bad, it still works but begins to act up when it gets hot. For some cars you'll need to open your fuel tank for a while for the car to even start again after it's worked for a while. Like someone stated, you bought bad fuel somewhere and that brought the problems from the pump. Get an injector cleaner as well bur you'll need to change your pump[/quote

thank you so much, I will try that and report back.

izaac23:


Alright, I will do that and report back, thank you for your suggestion

Good morning pals,
I have done as stated, I bought Visa fuel injector cleaner and poured it inside a full tank, fired it for 40mins on a highway, then reaching where I went, I fired back again.

The next morning, when I came to test drive it, the problem still persisted

My gurus, Is there any other recommendation in the house pls,

Is there anyone who has experienced this problem before, I need your expert advice pls.

izaac23:



Good morning pals,
I have done as stated, I bought Visa fuel injector cleaner and poured it inside a full tank, fired it for 40mins on a highway, then reaching where I went, I fired back again.

The next morning, when I came to test drive it, the problem still persisted

My gurus, Is there any other recommendation in the house pls,

Is there anyone who has experienced this problem before, I need your expert advice pls.

This might need someone with real diagnostics skills fo figure out. Your 2003 Corolla uses drive by cable throttle body. When is it misfiring on idle, or when moving down the road or both?

Since you said the car was working fine before things went south all of a sudden, I will be suspecting that something failed, something that has close relationship with fuel metering.
I would be suspecting a leaking fuel injector or a failed idle air control valve. It could be a lot of things but let's start with the simple stuff first

Remote assistance is possible only to an extent, if you're lucky, we might get to the root cause of the problem.

Revert soon while I'm free let's see how we can tackle this.


#AutoJando

jimts:




This might need someone with real diagnostics skills fo figure out. Your 2003 Corolla uses drive by cable throttle body. When is it misfiring on idle, or when moving down the road or both?

Since you said the car was working fine before things went south all of a sudden, I will be suspecting that something failed, something that has close relationship with fuel metering.
I would be suspecting a leaking fuel injector or a failed idle air control valve. It could be a lot of things but let's start with the simple stuff first

Remote assistance is possible only to an extent, if you're lucky, we might get to the root cause of the problem.

Revert soon while I'm free let's see how we can tackle this.


#AutoJando

The first few days the problem started, it jerks on idling when i kick the engine in the morning, but after few days, the jerking stoped on idling and was now jerking on my first drive of the day, especially when I load it with A/C when driving, if I throttle down, it will stall and vibrate instead of responding, then pick and drop and pick.

But it will stop the jerking altogether after driving a while for the day and becomes normal for the rest of the day.

izaac23:



The first few days the problem started, it jerks on idling when i kick the engine in the morning, but after few days, the jerking stoped on idling and was now jerking on my first drive of the day, especially when I load it with A/C when driving, if I throttle down, it will stall and vibrate instead of responding, then pick and drop and pick.

But it will stop the jerking altogether after driving a while for the day and becomes normal for the rest of the day.

We can start this diagnostics with the investigation of the Idle Air Control Valve which is an integral component of the throttle body (aka "injector mouth".

If you can't do this yourself, find a mecho an instruct him to remove the throttle body and unscrew the IAC valve. Check if it clogged. If yes, clean it, use very thin bead rtv gasket maker to seal all surfaces. See attached image
Reassemble and check if the problem persist and then revert..


#AutoJando

izaac23:



The first few days the problem started, it jerks on idling when i kick the engine in the morning, but after few days, the jerking stoped on idling and was now jerking on my first drive of the day, especially when I load it with A/C when driving, if I throttle down, it will stall and vibrate instead of responding, then pick and drop and pick.

But it will stop the jerking altogether after driving a while for the day and becomes normal for the rest of the day.

Someone here suggested starting with the basics which is cleaning the throttle body and I found this video on YouTube, in which the problem is similar to yours, in that the car stalls after the A/C is on. Watch this short clip and let your mechanic carry out the simple task here. Also change your air filter if it’s dirty to allow for better air flow. Hopefully it works out


https://www.youtube.com/watch?v=AduZM33x534

See solution below

izaac23:
I own a Corolla 2003 model, I take care of it very well cuz it's my only car,

I went to fuel at a station close to my house before I parked on an evening I return from work, only to start my vehicle that always has a smooth sound the next morning to hear it jerk seriously.

It cleared overtime from jerking at stationary, only to jerk when I engage the gear to move, and also jerks and stalls on motion when I drive in the morning,

It doesn't respond promptly to truttling , when you throttle, it stalls, pick and drop,
And when I engage a/c, it gets worse.

Mechanics have services nuzzles, injector and injector pipes, fuel pump strainer has been washed, (even though it was not dirty) plugs has been cleaned, but the problem still persist.

Pls I need help expert in the house, wat more shall I do?? wat could be wrong with my vehicle cuz it's giving me sleepless night??

Help pls

If the problem is mainly in the morning (cold weather) then you should suspect the intake exhaust manifold gasket. Get carburetor cleaner and spray on the exhaust manifold and if the engine sound changes then the gasket is bad and should be replaced. It happened also with my corolla and I[b] spent N70,000 fixing other things [/b]and not knowing that it was the gasket on the intake exhaust. GOODLUCK

Just change the coil. One or two of the coil is bad. This happened to my Corolla 09. And I scanned it. Changed two of the coil and the plugs. And the sounds became normal

izaac23:
I own a Corolla 2003 model, I take care of it very well cuz it's my only car,

I went to fuel at a station close to my house before I parked on an evening I return from work, only to start my vehicle that always has a smooth sound the next morning to hear it jerk seriously.

It cleared overtime from jerking at stationary, only to jerk when I engage the gear to move, and also jerks and stalls on motion when I drive in the morning,

It doesn't respond promptly to truttling , when you throttle, it stalls, pick and drop,
And when I engage a/c, it gets worse.

Mechanics have services nuzzles, injector and injector pipes, fuel pump strainer has been washed, (even though it was not dirty) plugs has been cleaned, but the problem still persist.

Pls I need help expert in the house, wat more shall I do?? wat could be wrong with my vehicle cuz it's giving me sleepless night??

Help pls

Scan and request for the result of the scan. Since it happens only on cold start, you are likely to get a P0011 code. If for any reason you get this code, it would come along with misfiring codes in other cylinders as a result of the jerk. The Oil control valve is the problem. Picture is attached. You can have it cleaned or replaced. The last time such happened, the ocv valve was found to have broken, it was replaced and that was the end.
Goodluck

Check the ‘butterfly’ in the Idle Air Control valve. It’s likely stuck.

Sorry pals, I left the car for two months and traveled, hence my late reply.

I took the car to a fuel line specialized mechanic, he serviced the nozzles, plugs, air flow sensor etc, and
BOOM! The vehicle was better than before the issue started.

But after days, a code came up (P0125, insufficient coolant temperature for close loop fuel control)
mechanics here are not digital and they don't really understand wat to do, I have tried many things like changing the cold switch, checking my thermostat, but to no avail

I don't know how to test if the 02 sensor is working correctly.

That is why I am here to humbly ask for the help of the specialist in this forum, pls what else can I do, help me because it has decreased my fuel economy for about 40%.

And the vehicle has more throttle power on movent than before any of these problem started, if this will be of any help.
Thank you in anticipation.