Toyota Corolla GLI 1.3 Manual hesitant when pulling away in 1st gear

[umair149]

Hi,

I have Toyota Corolla GLI 1.3 Manual 2017 with 74k on ODO. I recently bought this car.
When i move in 1st gear, on depressing the clutch, car seems hesistant and rpm drops and it shakes a bit, i have to press a bit more accelerotor to overcome this. It feels like car is dying. This also happens i reverse the car.

Apart from this there is no issue, when moving, gear changes are smooth and there is no clutch slippage etc.

And also this just happens when car is warm, on cold start in the morning, this problem is almost gone, but when engine is warm this problem is visible.

I have driven a friends Corolla and it did not have this issue.

My question is what could be the reason for this issue. Is it related to Air intake system or related to clutch/transmission. And what is the possible remedy for this.

Expert opinion is much needed.

@Xulfiqar Bro please have look and share your thoughts. Thanks

Regards

[anon35615524]

Brother I think there is some issue in the fuel supply system (from fuel tank via fuel pump, till fuel injectors). Still, experts can guide better.

[joji_887]

U have to live with it. Almost 80%ppl having FL xli or gli are facing the same issue. U have to press the accelerator a bit more, otherwise engine stops

[rajaahmed96]

Maybe clutch has seen its days.

[Xulfiqar]

This happens when there is a fuel trim problem right off idle.

[rajaahmed96]

How to solve it?

[Xulfiqar]

its not DIY job,

you need a fine resolution scan tool - interrogate the trims, check the engine for faults, usually its a lean miss. A good mechanic can find it.

[joji_887]

What if the problem is in new car.

[umair149]

Thanks. I ll try to pull short and long term fuel trim log and see what is happening.

As far as fault code, there are none, i checked with ELM 327

[Xulfiqar]

take it back to dealer.

[umair149]

@Xulfiqar

I plugged the scan tool today once the car was warm and Fuel management system was in closed loop, O2 sensor properly heated up. No DTC, No Monitors showing any failure. Only single bank (bank 1) readings are there, because there are no multiple bank sensors in place for this model.

Here are the results for O2, STFT and LTFT.

RPM: around 800 with AC off at idle with no foot on accelerator
O2 Sensor Voltage: Oscillates between 0.08 and 0.8 V
Short Term Fuel Trim: Oscillates between -3 and +2 approx
Long Term Fuel Trim: -3.2

Upon shifting into 1st and depressing clutch slowly without any pressure on accelerator, car shakes and start to move and Short Term Fuel Trim dips to approx -4 and sometimes -5

RPM: around 2500 with AC off at idle with slight foot on accelerator pedal.
O2 Sensor Voltage: Oscillates between 0.08 and 0.8 V
Long Term Fuel Trim: +2.2 approx.

Although Fuel trims are not off the charts at idle RPM and at 2500, but looking at LTFT value of -3.2 and dip in STFT on depressing the clutch, can we say that ECU is not getting the required Air it should be and we have somewhat rich mixture as LTFT suggests. Is it possible that IACV is somewhat choked.

Please share your thoughts.

Regards

[Mirza967]

My corolla fl showed same behavior and my problem was resolved by changing TPS and accelerator paddle as its DBW

[umair149]

@Mirza967
Did u get the exact same symptoms and no other symptoms like bad fuel avg or Irregular rpm up down. Because i have no other symptoms.

How much did it cost to change tps nd accelerator padle.

Thanks

[Mirza967]

Nop nothing else ....bdw mine was gli auto....and it wasn't costed anything coz it was done in warranty

[umair149]

bump

[COOLTAHIR]

i have 2015 gli and its same. you have to press a bit of accelerator to move it otherwise it knocks

[umair149]

Solved.
Apparrntly it just needed an idle relearn.
Had to disconnect battery for few minutes.
Then drove for few minutes and let it idle for couple of minutes and it re adjusted itself.
Apparently previous owner had throttle body serviced and did not do an idle re learn.