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Engine idles fine but no power on acceleration?

Tiny
LOU P
  • MECHANIC
  • 118 POSTS
Does it matter if the engine is hot or cold? Does it run differently?
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
WESWALKER88
  • MEMBER
  • 15 POSTS
No it does not. I order a temperature sensor I just read that could cause this problem with Chevrolet's.
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
WESWALKER88
  • MEMBER
  • 15 POSTS
Hot or cold runs the same.
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
LOU P
  • MECHANIC
  • 118 POSTS
This is a good one. Have you verified battery voltage at low and high rpm and at the engine control unit?
I think you said you did the timing. Do you have a scan tool that can read live data while the engine is running?
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
WESWALKER88
  • MEMBER
  • 15 POSTS
No, I do not have a scam tool, but I replaced the ECU.
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
WESWALKER88
  • MEMBER
  • 15 POSTS
Evap leak? Any idea where I can get a diagram with the accumulator on it I have been searching the web and cannot find one.
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,098 POSTS
Hey WESWALKER88,

I am starting to think you may have a broken valve spring. Can you remove the valve cover and check each spring with a flash light please? Also, while you have the valve cover off check the camshaft lift while cranking the engine over see if one of the rockers is not moving as much. Disconnect the coils so the engine does not start.

Best, Ken
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
WESWALKER88
  • MEMBER
  • 15 POSTS
Checked all good
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There is a solenoid on evap not actuator it by the fuel tank.
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
WESWALKER88
  • MEMBER
  • 15 POSTS
Know what it's called our how to check it
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Monday, December 14th, 2020 AT 9:24 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Yes you ground one side and put power to other if it clicks it works if not it doesn't pretty simple you haven't done anything anyone has replied to your questions
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Monday, December 14th, 2020 AT 9:24 AM (Merged)

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