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Old 10-22-2014, 02:04 PM   #1
sinful85
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85 monte 4.3 erratic idle

so I swapped my old 4.3 for one out of a 86 chevy blazer. the motor ran great in the blazer but after getting everything hooked up I get erratic idling and poor response from the car. throttle body is new as well any ideas where to start?
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Old 10-22-2014, 06:11 PM   #2
maxwedge
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Re: 85 monte 4.3 erratic idle

Look for vacuum leaks and an egr valve not seating closed.
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Old 10-22-2014, 10:36 PM   #3
sinful85
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Re: 85 monte 4.3 erratic idle

Thank bud I'll give that a try I noticed the sensor for the egr broke any clue where I can get a new sensor
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Old 10-23-2014, 07:40 AM   #4
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Re: 85 monte 4.3 erratic idle

Try napa or a dealer.
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