Engine has rough idle and lack power?

Tiny
JACOBANDNICKOLAS
  • EXPERT
There are several of the vacuum hoses there. However, have you checked to see if there is a blockage in the exhaust? If it is plugged or partially plugged, you will lose power.

Take a look through these links:

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

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

Joe
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
BKM97423
  • MEMBER
I found out it is the automatic choke. Worn parts are causing the choke plate to stay closed if I am not mistaken. A friend did some adjustments and for 2 days I thought my troubles were resolved but the first time I drove it on the hwy at a faster speed it started bucking and surging again exactly like before. I am am sending a photo of the things that aren't working right. First photo is so you can see carburetor and second one is what isn't working properly.
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
BKM97423
  • MEMBER
When I went to the parts store and as for an automatic choke the lady handed me a choke thermostat. I don't think that's the problem. The items that I circled in the photo are the items that are not moving when the accelerator is pushed. Those parts allow though choke plate to open and close and when I accelerate. Those parts don't move at all. When I move then manually they just flop around rather loosely and barley open and close the choke plate.
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

I looked again at the pictures you sent. The item appears to be the vacuum pull off for the choke. Do me a favor. First confirm there is a vacuum supply to them. If there is, see if the pull off holds vacuum.

Let me know.

Joe
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
BKM97423
  • MEMBER
Wow! It is fixed. I went to a local parts store and bought a fuel filter for $2.99 and a friend put it in for me. Took it for a test drive. No more bucking! Thanks for all the help and advice guys. I am so stoked! Brenda M Coquille, Oregon
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Wow! That's great news. I'm glad to hear you got it fixed. Let us know if you have questions in the future.

Take care,
Joe
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
BKM97423
  • MEMBER
Can you please tell me where the idle control screw would be located in my 1983 Chev S10 Blazer. Thanks guys! Brenda Merritt
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
I need you to take a picture of the main throttle lever for me to see. There are different designs. Curb idle is usually controlled by the vacuum stepper. If I recall (and it's been awhile), the vacuum controller screws in and out to adjust the idle speed.

Let me know.

Joe
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
BKM97423
  • MEMBER
I know that there is a screw missing on a metal plate that's right by the idle adjustment screw, but I don't know what it is for. Here are the photos I have of the carburetor. Let me know if this is what you needed. The small item circled near the idle adjustment screw is where I am pretty sure a small bolt/screw is missing because there is a clip on the metal plate where the hole is to keep the screw from coming out. Hope this helps Thanks, Brenda M
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Monday, December 14th, 2020 AT 9:36 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi Brenda,

I copied one of your pictures and circled what I believe to be the idle control motor. There should be a threaded bolt coming from the opposite side that pushes against the throttle lever. You should be able to extend that bolt to increase idle speed. I also noticed that there is no electrical connector attached to it. Did you just have it disconnected while working on it?

Let me know
Joe
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Monday, December 14th, 2020 AT 9:36 AM (Merged)

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