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When the gas pedal is to the floor sounds like the turbo does not kick in

Tiny
JAMES LIGGITT
  • MEMBER
  • 2017 CHEVROLET TRAX
  • 1.4L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 77,000 MILES
After replacing the intake manifold, valve cover and exhaust manifold/turbo, the engine started right up sounds good, but I can only get 3,000 RPMs when gas is to the floor, let off the gas runs good. Almost like the turbo is kicking in. Also install a new air filter and oil and oil filter. After trying to figure this out by checking wires and hoses.
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Saturday, March 19th, 2022 AT 11:57 AM

15 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
I have seen this problem when the turbo is no good, is it a new turbo, rebuilt used? The way you can tell if the turbo is good is to check the shaft endplay. Check out this guide and the diagrams below that show the correct way to install the turbo.

https://www.2carpros.com/articles/how-turbo-chargers-work

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

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Saturday, March 19th, 2022 AT 4:12 PM
Tiny
JAMES LIGGITT
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  • 10 POSTS
It's new, and I messed up on the question; when the pedal is down to the floor the turbo does not kick in and thank you for getting back to me.
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Saturday, March 19th, 2022 AT 4:51 PM
Tiny
KEN L
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The turbo won't kick in when the engine is not under load.
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Saturday, March 19th, 2022 AT 4:58 PM
Tiny
JAMES LIGGITT
  • MEMBER
  • 10 POSTS
Could the Idle Air Control Motor IAC have been damaged when the intake manifold went bad, and I had to replace the vale cover? Since everything was bad, I pulled the exhaust just to see if it was okay. And the turbo was crack in a couple places near the waste gate, so I replaced it. The tachometer won't go past 3,000 RPMs.
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Saturday, March 19th, 2022 AT 5:29 PM
Tiny
KEN L
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When you say it wont go past 3,000 RPM is that when driving or park?
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Saturday, March 19th, 2022 AT 6:18 PM
Tiny
JAMES LIGGITT
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  • 10 POSTS
Both.
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Saturday, March 19th, 2022 AT 7:47 PM
Tiny
JAMES LIGGITT
  • MEMBER
  • 10 POSTS
Only different in drive moving when I give it gas it runs ruff still goes no higher 3,000 RPMs. Then engine light comes on but does not bring up a code that goes out when I get back to my garage after I shut it off and start it back up and let it idle for a while. Thanks again
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Sunday, March 20th, 2022 AT 9:40 AM
Tiny
KEN L
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When you did the work did you get all the ground wires back on the engine? It would help if you could upload a video of the engine running so I can see what's wrong. Does it seem like the engine is misfiring?

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Please run down this guide and report back.
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Monday, March 21st, 2022 AT 10:08 AM
Tiny
JAMES LIGGITT
  • MEMBER
  • 10 POSTS
No, it doesn't. And I hooked up all the grounds. The only one that I took off was the one on the intake and it came with a new one and I connected both ends and I also ordered a Dorman fuel injection throttle body assembly it the only part I didn't replace. That I had to clean oil out of. After I install it tomorrow, I will let you know how it did one way or the other. And if no good I will also send you a video. Thanks for keeping in touch. Jim L.
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Monday, March 21st, 2022 AT 5:57 PM
Tiny
KEN L
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No problem, sound good. Also, a compression test might be in order as well. this guide can help:

https://www.2carpros.com/articles/how-to-test-engine-compression

Please run down this guide and report back.
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Monday, March 21st, 2022 AT 7:01 PM
Tiny
JAMES LIGGITT
  • MEMBER
  • 10 POSTS
I put the new part on today, still the same. Will be going to pick up my compression kit tomorrow and depends on the out come. If it rings or what if I'll do it or send it out. Just getting fed up. Thanks for the help, take care. Jim. L.
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Wednesday, March 23rd, 2022 AT 7:14 PM
Tiny
KEN L
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Try to remove the exhaust in front of the catalytic converter, it may be clogged. This guide can help:

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

Please run down this guide and report back.
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Thursday, March 24th, 2022 AT 9:29 AM
Tiny
JAMES LIGGITT
  • MEMBER
  • 10 POSTS
I wish. Just pick up compression test kit today and the #s seems okay, all 4 cylinders read 210. Also bought a combustion leak detector turn blue to all most yellow I guess head gasket, head, or crack block all so notice coolant just let loose today at the water pump and if it's anything like my 2005 Chevy Aveo when the water pump went it made the engine jump time and blew a spark out the head and I had to put new threads in it still running that happen at 75,000 miles now it as of now it has all most 150,000 maybe time to change again. And this 2017 Chevrolet track has about 77,000 miles on it. And the 2nd plug from the right was the only one that wasn't tight. So, now I have to figure out what may be cheaper new or rebuilt engine or parts and repair. Myself or repair shop I know If I do it will be cheaper but will take longer and know if I do I, be pulling the motor. Are you busy HA HA well I guess you can't help me no more but thanks to you I know what is wrong. Thanks: Jim L.
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Thursday, March 24th, 2022 AT 4:10 PM
Tiny
KEN L
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Please let us know what you find. We are interested to see what it is.
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Saturday, March 26th, 2022 AT 6:35 PM
Tiny
JAMES LIGGITT
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Will do.
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Saturday, March 26th, 2022 AT 8:59 PM

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