I HAVE A COLORADO WITH , , 111,000 MILES. iT HAS BEEN KEPT UP, ONLYHAD IT 1 YR
1 YR, LAST SUMMER IT STARTED IDLING ROUGH THEM AT A STOP IT WOULD
JUMP A LITTLE , SO HAD THROTTLE BODY CLEANED, SPARK PLUGS
REPLACED, 2 NEW COILS,AIR FILTER STILL NO CHANGE. WHEN THE ENGINE
LIGHT WOULD COME ON THE CODE SAID, AIR INJECTION VALVE
MALFUNCTION, SO HAD THAT ALL CHECKED OUT. AS WEATHER GOT COOLER
IT STOPPED. NOW ITS BACK AGAIN HAS NO POWER WITH AC ON
ESPECIALLY WHEN ENYERING THE FRWY HAVE TO TURN AC OFF. WHAT IS
Sounds like the engine needs a Motovac treatment. We use Colorados as delivery vehicles at my job. They sometimes develop a surging, rough idle condition. The Motovac treatment straightens them out. HTH. -Jim
Good to know, I use my Colorado to deliver parts in, so I drive a lot! I'll get that done and see if it helps, thank you
You're welcome. Glad to help. Thank you for the best answer click as well. -Jim
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