Tune-up on 3.8L



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Thread: Tune-up on 3.8L

  1. #61
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    Quote Originally Posted by ratsttam View Post
    AWD here, and I get 16mpg city, and hit 20.2mpg on a 75m highway trip (avg 70mph) I just took. 104,000mi, not sure of when the last tuneup was.
    Most likely your van has never been tuned up. Why? Because the recommended interval for tune-ups is 100,000 miles.
    Sold: 1998 DGC Sport 3.8 (Final odo: 178,000 miles)
    Sold: 1998 Chrysler T&C LXi 3.8 (Final odo: 190,000 miles)
    Sold: 2003 DGC ES 3.8 (Final odo: 172,000 miles)
    1998 Audi A4 Quattro (5-Speed manual)
    2001 Honda Accord EX V6 (4-Speed automatic)
    2009 Mazda3 i Touring (5-Speed manual)
    2012 VW GTI (6-Speed manual)

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  3. #62
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    Quote Originally Posted by shipo View Post
    Most likely your van has never been tuned up. Why? Because the recommended interval for tune-ups is 100,000 miles.
    Won't argue that. Runs really good though, just not sure if the dealer tuned it up before I bought it (@99,000mi), or if the previous owner had it done sooner.
    'suppose it won't hurt to just do it myself and know for sure.
    2005 Kia Sorento LX 4x4 44,000mi
    2003 Chrysler T&C Limited 3.8l AWD 145,000mi Traded in 9/14/11
    2000 Dodge Stratus ES v6 179,000 sold 7/2011

  4. #63
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    Quote Originally Posted by ratsttam View Post
    Won't argue that. Runs really good though, just not sure if the dealer tuned it up before I bought it (@99,000mi), or if the previous owner had it done sooner.
    'suppose it won't hurt to just do it myself and know for sure.
    I waited to tune up both of our 3.8 liter vans until after the hundred thousand mile mark (nearly one hundred and twenty thousand in the case of our 1998), and there was zero difference between the fuel economy and how the vans drove following the tune ups.
    Sold: 1998 DGC Sport 3.8 (Final odo: 178,000 miles)
    Sold: 1998 Chrysler T&C LXi 3.8 (Final odo: 190,000 miles)
    Sold: 2003 DGC ES 3.8 (Final odo: 172,000 miles)
    1998 Audi A4 Quattro (5-Speed manual)
    2001 Honda Accord EX V6 (4-Speed automatic)
    2009 Mazda3 i Touring (5-Speed manual)
    2012 VW GTI (6-Speed manual)

  5. #64
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    Quote Originally Posted by shipo View Post
    I waited to tune up both of our 3.8 liter vans until after the hundred thousand mile mark (nearly one hundred and twenty thousand in the case of our 1998), and there was zero difference between the fuel economy and how the vans drove following the tune ups.
    I'm with Shipo, I tuned mine up about a month ago at a tad over 105,000 miles. Went with good wires and the Champion double platinum plugs it calls for. Zero difference in how it runs, or the fuel economy.
    Jeff
    http://www.facebook.com/eddie.munster
    Current:
    2007 Grand Caravan/3.8L V6/103K mi/original 41TE
    2006 300C/5.7L HEMI V8/128/K mi/original W5A580
    2002 PT Cruiser/2.4L I4/139K mi/original 40TE
    1992 S-10/4.3L V6/249K mi/original 4L60E
    Previous minivans:
    1997 Grand Voyager SE/traded@192K mi/3.3L V6/original 41TE
    2003 Grand Caravan Sport/3.8L V6/traded@124K mi/original 41TE
    2007 T&C/3.8L V6/traded@44K mi/ original 41TE
    2010 T&C Touring/3.8L V6/the ex's@72K mi/original 62TE

  6. #65
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    not to sure about that 100,000 mile tune up business. denso calls for their iriduim plugs to be changed at 30,000 miles due to the combustion forces. the plugs in my focus had worn to a bigger gap, etc.

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    Quote Originally Posted by mrzog View Post
    not to sure about that 100,000 mile tune up business. denso calls for their iriduim plugs to be changed at 30,000 miles due to the combustion forces. the plugs in my focus had worn to a bigger gap, etc.
    Who cares what Denso recommends, Denso plugs are NOT specified for use in our vans, Champions are, and like it or not they're good to go for over 100,000 miles of normal driving.
    Last edited by shipo; 09-26-2009 at 02:16 PM. Reason: Had to add the word "NOT", sorry, my bad.
    Sold: 1998 DGC Sport 3.8 (Final odo: 178,000 miles)
    Sold: 1998 Chrysler T&C LXi 3.8 (Final odo: 190,000 miles)
    Sold: 2003 DGC ES 3.8 (Final odo: 172,000 miles)
    1998 Audi A4 Quattro (5-Speed manual)
    2001 Honda Accord EX V6 (4-Speed automatic)
    2009 Mazda3 i Touring (5-Speed manual)
    2012 VW GTI (6-Speed manual)

  8. #67
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    Quote Originally Posted by mrzog View Post
    denso calls for their iriduim plugs to be changed at 30,000 miles due to the combustion forces.
    That's odd, since the Iridiums used in Hondas have a 100K+ replacement interval. Those are NGKs though. They DO last....

    Yes, the plug gaps get wider over time, but not so much as a standard plug. (The OE Double Plats in my '02 Caravan had almost twice as wide a gap as spec'ed after 62,000 miles). The extremely narrow electrode on an Iridium plug makes for a good spark.
    Atwell "Buff" Haines
    Northern NJ
    2002 Grand Caravan ES "Extra Special"...
    Blue
    3.8L, Touring Suspension, 17" Alloys, and Autostick

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    Quote Originally Posted by Chrysler1924 View Post
    Actually...

    I just put in new plugs and wires in my own Chrysler Corporation 3.8L EGH V6 that's sitting in my Town & Country and I did NOT put in Champion Dual-Platinum plugs. Squawk as everyone might, I did NOT just put in the Bosch Platinum +4™ plugs that are really popular... I put a set of Bosch Platinum Iridium Fusion™ plugs along with Bosch Ultra-Premium 7mm Opti-Layer Mag Core wires. I've since put several thousand miles on that engine and it has run beautifully. I've gotten great fuel economy... runs smoother than it did before.

    About a month ago, I took a look at the plugs and they look absolutely fine.

    I agree that the OEM equipment is CHAMPION... and that you really should go with OEM in most cases, but that doesn't mean ALL cases.
    I changed to these Bosch Platinum Iridium Fusion™ plugs a couple of years ago and have found them to be a good plug. I removed them twice since and they looked fine. That was at 97.000 klm and at 118,00 I changed them again with the same plug. It runs great with lots of power. I prefer them over the double plat plugs.
    2000 Caravan 3 L. 17-20 MPG. 134,000 klm. New tranny at 97 K. Tires are P205 70R14 Bridgstone M+S. 123,800 KM. replaced tensioner pulley, serpentine belt, and power steering pulley.
    Old reliable - 1982 Dodge Ram Long Box 318 Auto 3 speed transmission 66 K.

  10. #69
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    Quote Originally Posted by dun4now View Post
    That was at 97.000 klm and at 118,00 I changed them again with the same plug. .
    You changed your plugs AGAIN at 21K kilometers on them????

    Seems excessive.
    Atwell "Buff" Haines
    Northern NJ
    2002 Grand Caravan ES "Extra Special"...
    Blue
    3.8L, Touring Suspension, 17" Alloys, and Autostick

  11. #70
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    I guess mine are due. Van has around 122K.

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