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#1
05-05-2005, 03:52 PM
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Almost perfect Idle but not quite....
How smooth can you get a 4.3L with a balance shaft to idle ?
No codes, no hesitation, no stalling, but an ever-so-slight stumble. The only thing that hasn't been replaced is the wires with 165K on them. some times it so smooth you can't tell if it's running, other times its slight stumbling, but tach stays 650 rpms in gear, at idle and doesn't move... Go ahead tell me I'm nuts, can it get smoother....hate to just replace everything, but what would be a good place to go... Replaced within the last 6 months PCV and cleaned tube. Cleaned EGR Air Filter Cleaned throttle body Auto-RX cleaning 400 miles so far AMSOIL performance improver in the last 6 months Cap and Rotor replaced Original Wires (no indication that there is leakage on wires like cracks, sparks etc) Coil MPG is a steady 18-20+ Maybe it's as good as it gets with 165K on it...but thought I'd ask.....
__________________
1999 Blazer LS 4WD 4.3L "W" 2004 Silverado 2500HD Duramax 
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#2
05-05-2005, 04:47 PM
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Re: Almost perfect Idle but not quite....
Plugs?
Cleaned the MAF? And I see you got some Auto-RX? GOOD FOR YOU! 
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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#3
05-06-2005, 08:17 AM
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Re: Re: Almost perfect Idle but not quite....
Quote:
MAF was replaced in February..but could check I suppose...Plugs have about 65K on them and it's possible and should change them... There is probably alot of very mi-nute things contributing intermittent stumble...... Thanks
__________________
1999 Blazer LS 4WD 4.3L "W" 2004 Silverado 2500HD Duramax
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#4
05-06-2005, 09:59 AM
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Re: Almost perfect Idle but not quite....
From my experience you have done good to have that many miles on the ign wires. I would say at least it is time to replace them. You IAC might be getting dirty too, but it is not as easy to service, may have to try new one.
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#5
05-07-2005, 08:49 PM
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Re: Re: Re: Almost perfect Idle but not quite....
Quote:
Yea, time to replace them, don't believe the 100k stuff. For the $30 cost, it will help you a lot.
__________________
1995 Factory Blazer Service Manual for sale, PM if interested.
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