Car Jerking when uphill place or sudden accelerator press

HAMID2210831

MEMBER
2010 TOYOTA PASEO
3 CYL
2WD
AUTOMATIC
100,000 MILES

Otherwise car is fine. Fuel average is 17+/liter. Sir, first of all I have done complete tuning and catalytic converter, cleaning through acid. I also checked fuel motor and all sensor like o2, crank, gear shiftier, throttle body, coil wires and spark plug. Above mentioned sensor replace other one, one by one also, but still issue, but on smooth foot car also gone 170 per km per hour with out any problem when press accelerator hard then problem occurs or when on uphill place. Other wise every thing is okay.

2 Replies

JACOBANDNICKOLAS

MECHANIC
109,724 POSTS

Hi and thanks for using 2CarPros.

Is the check engine light staying on while the engine is running? Have you confirmed the fuel pressure is within the manufacturer's specs? When you go up hill or press harder on the accelerator, it requires more fuel. It may still be the fuel pump, a fuel filter, or other fuel related issue.

Next, how was the catalytic converter cleaned? Here is a link that discusses fuel pressure testing:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Start with that. Also, if the catalytic converter is partially plugged, it can cause driveability issues. Read through these links:

https://www.2carpros.com/articles/bad-catalytic-converter-symptoms

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Let me know if this helps. Also, if the check engine light is staying on when the engine is running, scan it to retrieve diagnostic trouble codes.

Here is a quick video showing how a scanner works:

https://youtu.be/YV3TRZwer8k

Let me know what you find.

Joe