I HAVE A 91 CHEVY K1500 4X4 PU WITH A IDLE ISSUE

  • Tiny
  • hmac300
  • Expert
  • 43,547 posts

Remember I said to check the hose leaing to the pmap sensor to make sure it has no holes or soft? That's on the firewall that is what I suspected but wasn't sure but it hink you saidhoses were ok, well pull it off map and see if you ae getting vacuum through it. If you are replace it. Check wiring at tps and see ifyou are getting voltage through any of the wires. And the vss may be why your speedo isn't working or the wiring is bad. It all relates to each other when vehicle is running and warm.

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Friday, December 7th, 2012 AT 1:55 PM
  • Tiny
  • Brandon .spurlock@ymail.com
  • Member

Ok. So to make sure I am doing this correct. I am going to pull the vacumm line off the map sensor and check for vaccum. If I have vaccum replace the map sensor? Also check the tps wires for voltage with a multi meter. If I do have voltage what would be next? R/R the tps? I have replaced the vss and the inst. Cluster. Broken wire possibly? With the miles on the truck and the electrical problems I am having do you think it is possible the ECM is going out? Thanks for the help on this stuff I will definitely be donating some more money to the website.

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Friday, December 7th, 2012 AT 8:45 PM
  • Tiny
  • hmac300
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  • 43,547 posts

Follow the charts i'm sending. And look at th pics so you can probel the right places.

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Friday, December 7th, 2012 AT 8:55 PM

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