Correcting speedometer?

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arlon
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Re: Correcting speedometer?

Post by arlon »

Did the update for the tire size and now at highway speed the speedometer is 2-3mph faster than the GPS. Also did the firmer shift upgrade and it now clunks going into reverse, can't tell any difference going forward. If my mileage takes a nose dive as I'm now suspecting, I'll be one unhappy, broke but smarter van owner. I think I just got a very expensive single car ODB II reader.)-:}
2004 AWD Astro 2" lift, overnight-able
2003 Dodge/Cummins Quad cab
2006 Nissan X-terra MT
1985 LTD LX 5.0 HO
Plus wife's and kid's cars to take care of...

97CargoCrawler
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Re: Correcting speedometer?

Post by 97CargoCrawler »

Well that's a bummer. Mine did nothing but good things for me, but I have 31's and the speedo and shift points were way off. Which model did you buy?
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arlon
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Joined: Wed Dec 28, 2011 8:56 am
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Re: Correcting speedometer?

Post by arlon »

I got the JET 15015 (google it).. Maybe if I do more to the van in the future it will have some effect. Might also do something if I did the premium fuel tune but I really don't want to pay the price for premium.
2004 AWD Astro 2" lift, overnight-able
2003 Dodge/Cummins Quad cab
2006 Nissan X-terra MT
1985 LTD LX 5.0 HO
Plus wife's and kid's cars to take care of...
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MountainManJoe
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Re: Correcting speedometer?

Post by MountainManJoe »

Are you able to undo the changes you made, and return the PCM to factory config?
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Topic author
arlon
I finally get the smurf thing
Posts: 164
Joined: Wed Dec 28, 2011 8:56 am
Location: Midland Texas
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Re: Correcting speedometer?

Post by arlon »

Very easy to undo it all. I will be playing with it a little just to see what I can come up with.
2004 AWD Astro 2" lift, overnight-able
2003 Dodge/Cummins Quad cab
2006 Nissan X-terra MT
1985 LTD LX 5.0 HO
Plus wife's and kid's cars to take care of...

LiftedAWDAstro
I have my van tatooed on my cheeks
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Re: Correcting speedometer?

Post by LiftedAWDAstro »

How has the JET programmer worked overall? I will need to correct for the 4.10 gear change as I am not going to larger tires any time soon.
Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition

Mileage spreadsheet

Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy
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