2000 Blazer "surging" - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-14-2000, 08:12 PM
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2000 Blazer \"surging\"

I have a 2000 4dr 4x4 Blazer with only 3000 miles on it. Since new I have noticed the vehicle "surging" going down the highway under foot power and under cruise. I cant hear anything or are there any changes in rpm or anything else. I can feel it though. My wife also noticed something wrong almost like a slight intermitent tranny slip (4spd auto) It really does it uphill and when pulling our boat. I have already had it to the dealer and they reprogramed the computer and said that they could find nothing wrong. Any suggestions before I go back to the dealer again? Has any one had this problem and how was it cured.

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post #2 of (permalink) Old 09-20-2000, 02:43 PM
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Re: 2000 Blazer \"surging\"

Hey Dale
I was having the same problem with my 94 Sonoma. I found it to be my throttle posistioning sensor. (Thanks to the help of another 4x4 site) It may be an off and on again problem. Check the voltage on the TPS with a volt meter. You'll have a different setup under your hood so I can't say where exactly to look for it. Hopefully the wire colors are the same. If you take the grey(+) wire and the black(-) wire, measure the voltage. It should be minimal. As you increase throttle, the meter should measure a steady increase in voltage. You should be able to get it up to 4-5 volts at 4000rpm+. If this does not happen, you have got a bad sensor. It helps to buy a service manual. It will show you step by step how to do it. Good luck.


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