Car Jerking during acceleration

MSC43 · 01-30-2019, 06:54 AM

When changing gears and accelerating, the car hesitates and kinda jerks. Feels like its bogging down when accelerating. Acceleration is no where near normal. Also driving 90mph this morning in 5th gear, I punch it and it accelerated extremely slow. It just gradually increased speed.

Wondering if I have some bad gas......This happened before a few months ago and went away.

Car is a 2014 Sport with 70k miles

CRiZO · 01-30-2019, 08:34 AM

Have you replaced your spark plugs recently?

SouthArk370Z · 01-30-2019, 09:05 AM

First thing I'd do is get an OBD tool and check for any DTCs - cars are pretty good at self-diagnosis nowadays.

If no clues there, I'd clean the MAFs. Easy job for even a beginner. Only tool required is a screwdriver. Remove MAFs, spray down with cleaner, let dry, replace. Takes about five minutes per MAF.

If no improvement after cleaning MAFs, I'd clean the TBs. More complicated than cleaning the MAFs but not all that difficult.

Not sure what I'd try after all that.

MSC43 · 01-30-2019, 09:18 AM

Quote:

Originally Posted by CRiZO

Have you replaced your spark plugs recently?

No. Still has the original ones in.

Wuero370z · 01-30-2019, 10:29 AM

Quote:

Originally Posted by SouthArk370Z

First thing I'd do is get an OBD tool and check for any DTCs - cars are pretty good at self-diagnosis nowadays.

If no clues there, I'd clean the MAFs. Easy job for even a beginner. Only tool required is a screwdriver. Remove MAFs, spray down with cleaner, let dry, replace. Takes about five minutes per MAF.

If no improvement after cleaning MAFs, I'd clean the TBs. More complicated than cleaning the MAFs but not all that difficult.

Not sure what I'd try after all that.

^^^right process. I would also check your rear diff bushing. If there’s black fluid on your diff cover the stock rear diff bushing if toasted. Could explain your shudder. My Z also lost power but once I cleaned the mafs and throttle bodies extremely well I have had no issues

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MSC43 · 01-31-2019, 08:25 AM

Car drove fine today. Strange.

SouthArk370Z · 01-31-2019, 08:52 AM

Quote:

Originally Posted by MSC43

Car drove fine today. Strange.

I'd start looking for intermittent vacuum leaks (cracked hoses, etc) and wiring opens/shorts (dirty connector pins, misaligned connectors, pinched wiring, etc).

Quicksilvers · 01-31-2019, 09:52 AM

Quote:

Originally Posted by CRiZO

Have you replaced your spark plugs recently?

Definitely first try cleaning your throttle bodies and MAF sensors I agree and see how that does. Next I had this same problem before with one of my pervious Z’s and it could possibly be one or more of your ignition coils and/or spark plugs could be bad also a vacuum leak could be the culprit as well. Also if you have 70K original miles on your Genuine Nissan OEM spark plugs they are due to be changed. Please don’t wait 100K miles until you change your spark plugs as the Nissan dealership service department would recommend. I would change your spark plugs and check the condition of your ignition coils and look for any vacuum leaks.

Zingston · 01-31-2019, 10:09 AM

[QUOTE=MSC43;3820180]When changing gears and accelerating, the car hesitates and kinda jerks. Feels like its bogging down when accelerating. Acceleration is no where near normal. Also driving 90mph this morning in 5th gear,

Hold on... our Zs will go 90 mph????

Tractionless · 01-31-2019, 01:47 PM

Check the resistance of your coils as well. Specs in the manual, only need a multi meter.

1st · 02-04-2019, 06:21 PM

Try putting fuel in it, The only time I have had the car jerking and or bogging down was after taking a turn and beating on it due to fuel starve.

01-30-2019, 06:54 AM	#1 (permalink)
MSC43 Base Member Join Date: Jul 2015 Location: Georgia Posts: 55 Drives: ....... Rep Power: 11	Car Jerking during acceleration When changing gears and accelerating, the car hesitates and kinda jerks. Feels like its bogging down when accelerating. Acceleration is no where near normal. Also driving 90mph this morning in 5th gear, I punch it and it accelerated extremely slow. It just gradually increased speed. Wondering if I have some bad gas......This happened before a few months ago and went away. Car is a 2014 Sport with 70k miles Last edited by MSC43; 01-30-2019 at 06:57 AM.

01-30-2019, 08:34 AM	#2 (permalink)
CRiZO Track Member Join Date: Nov 2017 Location: Dallas Posts: 672 Drives: in traffic Rep Power: 20699	Have you replaced your spark plugs recently? ZoomZ and Quicksilvers like this.

01-30-2019, 09:05 AM	#3 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	First thing I'd do is get an OBD tool and check for any DTCs - cars are pretty good at self-diagnosis nowadays. If no clues there, I'd clean the MAFs. Easy job for even a beginner. Only tool required is a screwdriver. Remove MAFs, spray down with cleaner, let dry, replace. Takes about five minutes per MAF. If no improvement after cleaning MAFs, I'd clean the TBs. More complicated than cleaning the MAFs but not all that difficult. Not sure what I'd try after all that. Quicksilvers likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

01-31-2019, 01:47 PM	#10 (permalink)
Tractionless A True Z Fanatic Join Date: Jan 2016 Location: Atlantic SE Posts: 1,361 Drives: '10 K23 ST 7AT Rep Power: 30526	Check the resistance of your coils as well. Specs in the manual, only need a multi meter. __________________ Toys Not Tots

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01-31-2019, 08:25 AM	#6 (permalink)
MSC43 Base Member Join Date: Jul 2015 Location: Georgia Posts: 55 Drives: ....... Rep Power: 11	Car drove fine today. Strange.

01-31-2019, 10:09 AM	#9 (permalink)
Zingston A True Z Fanatic Join Date: May 2017 Location: Florida Posts: 4,028 Drives: like it's a rental. Rep Power: 2684371	[QUOTE=MSC43;3820180]When changing gears and accelerating, the car hesitates and kinda jerks. Feels like its bogging down when accelerating. Acceleration is no where near normal. Also driving 90mph this morning in 5th gear, Hold on... our Zs will go 90 mph????

02-04-2019, 06:21 PM	#11 (permalink)
1st A True Z Fanatic Join Date: Jul 2012 Location: I 80 Biz U.S. 50 Posts: 1,710 Drives: Platinum Z Rep Power: 1617	Try putting fuel in it, The only time I have had the car jerking and or bogging down was after taking a turn and beating on it due to fuel starve.