High RPM cold start
#1
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Join Date: Nov 2009
Location: Lauderhill FL
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Year: 1986
Model: Wagoneer
Engine: 2.8L V6 matching #'s CHEVY
High RPM cold start
I a 86 XJ wagoneer 2.8l v6 with a carb. When I start it cold
the rpms are up take and take a min to come back down.
Could it be the timing, I'm firing on all 6
the rpms are up take and take a min to come back down.
Could it be the timing, I'm firing on all 6
#3
CF Veteran
How high are the rpms?
AFAIK an idle of about 1000-1200 rpm would be normal for a carbed vehicle as it warms up (my moms old impala).
If the 2.8s have auto choke (not sure) the choke is closed when you start the vehicle and it slowly opens as the engine warms. Next time It does the high idle at a cold start, give it a quick LIGHT rev, dont redline it lol. If your “problem” is just the carb keeping it in high idle (something you may not be used to if you’ve never had a carbed vehicle in winter), then it will kick out of high idle and go to a normal ~750rpm, Or it will just stall out if its not warm enough...
AFAIK an idle of about 1000-1200 rpm would be normal for a carbed vehicle as it warms up (my moms old impala).
If the 2.8s have auto choke (not sure) the choke is closed when you start the vehicle and it slowly opens as the engine warms. Next time It does the high idle at a cold start, give it a quick LIGHT rev, dont redline it lol. If your “problem” is just the carb keeping it in high idle (something you may not be used to if you’ve never had a carbed vehicle in winter), then it will kick out of high idle and go to a normal ~750rpm, Or it will just stall out if its not warm enough...
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