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A few months ago I upgraded my 3500 to the 99 timing set (sprockets, guide, and chain). Everything went great, but I noticed that after my MPG's fell a lot, about 5MPG. I figured it was just due to having the battery unplugged and having to relearn the trims. I can get just over 200 miles per tank when before I was hitting almost 300. I've tested and tested when I filled up and my gas mileage STILL hasn't returned! I plan on installing a new intake pipe and new MAF along with a cone filter, so I know I am going to be retuning again soon and hopefully bring back my MPG's, but what the hell happened to them from just changing my chain?
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SpudFiles
Blast vegetables and whatever else you can think of!
Theopia
Enjoy life online.
1996 3500GP Coupe, "Bright White".
3500 swap, 60degreeV6 1393 Cam, Ported Intakes, Comp Cams Valve Springs, 65mm TB, Custom Pushrods, S&S Headers, 97 PCM with DHP Powrtuner, 2.5" back to dual Hooker Aerochambers, SS Brake Lines, Addco swaybar, KYB's, Intrax Springs, STB's, etc! -
Chain is a little bulkier, but I can't see it changing it that much unless you are off a tooth or something on the timing.
Got Lope?
3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS -
Did you mess up the timing one tooth??? That's the only thing I can think of...sigpic
New 2010 project (click image)
1994 3100 BERETTA. 200,000+ miles
16.0 1/4 mile when stock. Now ???
Original L82 Longblock with LA1, LX9, LX5 parts
Manifold-back 2.5" SS Mandrel Exhaust. Hardware is SS too.
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vote #3 for cam timing issues...Originally posted by IsaacHayes View Post
a timing set alone won't cause issues like this...Comment
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I made sure a number of times that it was absolutely perfect, I took enough care to not turn anything as well to keep the timing dead on. That is the first thing I thought of
SpudFiles
Blast vegetables and whatever else you can think of!
Theopia
Enjoy life online.
1996 3500GP Coupe, "Bright White".
3500 swap, 60degreeV6 1393 Cam, Ported Intakes, Comp Cams Valve Springs, 65mm TB, Custom Pushrods, S&S Headers, 97 PCM with DHP Powrtuner, 2.5" back to dual Hooker Aerochambers, SS Brake Lines, Addco swaybar, KYB's, Intrax Springs, STB's, etc!Comment
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Deleted!
Did I actually write that?
Need a better brand of stupid pills. Sorry!Comment
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Do you screw up the setting of your external trigger sensor when you removed the cover? That could cause your timing to be off as well.-Brad-
89 Mustang : Future 60V6 Power
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Follow the build -> http://www.3x00swap.com/index.php?page=mustang-blogComment
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That's a good idea, I will check it out!Originally posted by bszopi View PostSpudFiles
Blast vegetables and whatever else you can think of!
Theopia
Enjoy life online.
1996 3500GP Coupe, "Bright White".
3500 swap, 60degreeV6 1393 Cam, Ported Intakes, Comp Cams Valve Springs, 65mm TB, Custom Pushrods, S&S Headers, 97 PCM with DHP Powrtuner, 2.5" back to dual Hooker Aerochambers, SS Brake Lines, Addco swaybar, KYB's, Intrax Springs, STB's, etc!Comment
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Have you had any more metal shavings in the oil? What was the cause of that? Did you ever figure that out?sigpic New 2010 project (click image)
1994 3100 BERETTA. 200,000+ miles
16.0 1/4 mile when stock. Now ???
Original L82 Longblock with LA1, LX9, LX5 parts
Manifold-back 2.5" SS Mandrel Exhaust. Hardware is SS too.
Comment
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