Engine sputtering/power loss ****Fixed**** Bad TPS

[Mike_Metzger]

Thought I’d post this in the general forum to try and get some more ideas. 
2008 Joyner Renegade

800cc EFI Chery engine

1100mi

Starts and idles fine, drives well until you actually try to go, then starts to sputter as if it’s starving for fuel. Does this no matter what fuel pressure I set it too. I’ve tried 35-80psi 

New fuel pump

New fuel filter

Cleaned injectors

New thermostat

Fresh Fuel

Any smarty smarts out there with ideas? 

[T-boss 410]

What are the spark plugs gapped at? It's probably just the pic, but those gaps look kinda big. 

[Mike_Metzger]

I thought that too, but it’s just the super skinny tips make it look like the gaps are huge, did just pickup a feeler gauge though, we’ll see whet they are currently at. Any idea what recommended plug gap is? .035….. 

[Mike_Metzger]

3 hours ago, T-boss 410 said:

What are the spark plugs gapped at? It's probably just the pic, but those gaps look kinda big. 

Gap was about .050, gapped them to .030 and ZERO difference 😕😕😕

[T-boss 410]

Darn, was hoping it was gonna be something simple like that.

[T-boss 410]

According to my service manual, the gap for mine is 0.6-0 7mm. Not sure how that converts to inches. But, it is a moot point since you already regapped the plugs. 

[Mike_Metzger]

29 minutes ago, T-boss 410 said:

Darn, was hoping it was gonna be something simple like that.

I was hoping it was going to be that simple  as well 😣

[Travis]

13 hours ago, T-boss 410 said:

According to my service manual, the gap for mine is 0.6-0 7mm. Not sure how that converts to inches. But, it is a moot point since you already regapped the plugs. 

.023  -  .027 thou

[T-boss 410]

Thank you, sir!

[Mike_Metzger]

[Mike_Metzger]

Here’s a link to he vid on FB of the issue

Video Link

[Joe Breaux]

so, Throttle Position Sensor was faulty?  that will cause problems 

[Mike_Metzger]

3 hours ago, Joe Breaux said:

so, Throttle Position Sensor was faulty?  that will cause problems 

Yes, I missed it because I noticed there was a spare TPS in the glove box. Swapped em out and  it would barely run. So I put the original back on, but never actually tried just unplugging it. Once I did that, holy $hit does this thing rip! 

[Joe Breaux]

glad you found the problem

[Dennis Knepp]

On 6/16/2021 at 10:30 PM, T-boss 410 said:

According to my service manual, the gap for mine is 0.6-0 7mm. Not sure how that converts to inches. But, it is a moot point since you already regapped the plugs. 

.023-.027 gap