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 > Your search for posts made by 'mapguy' found 32 matches.

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  Subject Author Date Posted Forum
RE: Please help me identify 5th wheel towing issue.

To check if trailer frame is parallel to ground. Find a flat level spot for truck/trailer. Measure main rails (not fifth wheel platform portion of frame) of frame aa far forward as possible to ground . Then measure main frame rails to ground, as far back as possible. If frame is in the proper position -both front and rear measurements will be nearly the same. Much more than an 1" higher front measurement compromises suspension travel of rear axle. Lack of suspension travel amplifies the normal push-pull of a fifth wheel hitch system.
mapguy 08/15/19 03:09pm Fifth-Wheels
RE: Please help me identify 5th wheel towing issue.

Classic signs of 2 potential issues. 1. trailer/hitch/truck set up has trailer nose high. Trailer frame should be parallel with ground (level ground for checking). Having the trailer nose high reduces rear axle travel. Nose doesn't have to be very high to affect suspension travel negatively on a leaf spring suspension. 2. Pin weight - typically good ride has pin weight at or above 20% of actual trailer weight. Mine rides best with ~23% pin. you don't need helper springs or such if the truck does not sag at the proper pin weight. Edit: Are your factory overload springs staying fully engaged while towing? if not the symptoms you describe will be present.
mapguy 08/14/19 02:18pm Fifth-Wheels
RE: Duramax Turbo

these trucks can have problems with the turbo vanes sticking. It can be remedied with labor/cleaning but most shops won't do this type work. Typical shop will want to r&r the turbo as an assembly.
mapguy 08/06/19 05:02pm Tow Vehicles
RE: Replacing Tires on my GMC

5 tire rotation doesn't get you any more miles per tire or miles per dollar unless you're literally banking on the value of that cheap factory spare tire. It does do a good job of complicating tire rotations though. The one upside is if you have a 1 wheel peel vehicle and can't keep from wearing the right rear tire more than the other rear tire. Then a 5 tire technically makes a bit more sense and cents. Not using the cheap spare. Sold it with the wheel. Have a matching wheel and tire. So what's the attraction or advantage to a 5 tire rotation, save for maybe on a Jeep with expensive oversize spare tire sitting in the sun getting cooked? The motivation for having a matched spare is travel to very remote locations to camp and ride my dirt bike. Having a 5 tire rotation ensures that I have a serviceable tire to use if needed. I have seen many people with spare tire issues, tow vehicle or trailer, over the years in very remote locations. Many places I go have 30+ miles of washboard road to travel. Most of these places have no phone service either unless you have a sat phone. A rotted cheap spare is not going to get you back home in a reliable manner.
mapguy 07/06/19 03:10pm Tow Vehicles
RE: Replacing Tires on my GMC

mapguy, what mileage you gettin outa 5 tires? Michelin LTX AT2 - a little over 62,000 with 4/32 to 6/32 left.
mapguy 07/06/19 02:58pm Tow Vehicles
RE: Replacing Tires on my GMC

5 tire rotation doesn't get you any more miles per tire or miles per dollar unless you're literally banking on the value of that cheap factory spare tire. It does do a good job of complicating tire rotations though. The one upside is if you have a 1 wheel peel vehicle and can't keep from wearing the right rear tire more than the other rear tire. Then a 5 tire technically makes a bit more sense and cents. Not using the cheap spare. Sold it with the wheel. Have a matching wheel and tire.
mapguy 07/05/19 04:16pm Tow Vehicles
RE: Replacing Tires on my GMC

I rotate the tires at every oil change since new, I have the dealer due the oil changes right around 5000 miles. I run the rear tires at 80PSI and the front at 75PSI. Have about 5000 towing miles with the fifth wheel and then a few hundred miles with a utility trailer. No lead foot while towing the fifth wheel on the Interstate I set the cruise at 62 or 63, never over 65 except to pass if needed. Then back to the set speed. On back roads I due the posted speed limit. When not towing I due the speed limit or no more than 75 on the Interstate if the posted limit is 70. Hope this answers your questions. I'm just looking for a good set of tires, not what did you due wrong to cause the tires to wear down. Thank you to the ones that answered, looks like Michelin is the way to go. At those inflation levels running empty is like using 24 grit sandpaper on the tires. You will see excessive center wear on all 4 tires. Are you running tires that match the door frame sticker on the truck? if so run the fronts at the inflation level indicated on the sticker. There is no need to go above the door frame sticker on the front tires as you cannot load them enough to need anywhere near max inflation. If you truly want to get maximum mileage out of your tires -inflation must be set to match actual load. This means when running empty the rear inflation levels must be dropped to a lower level. As far as excessive wear with high inflation and low load, That pretty much went away with the advent of radial ply tires. I always have run both our trucks near max and never had excessive center wear, very even wear. And between them that's almost 300K miles. On my cars I run at high end of recomended inflation, mostly because of my driving style and again never had excessive center tread wear. And I'm running my trailer tires LRE at 80psi, when load inflation says 60 is enough and no center wear. Sorry, but my tread measurement tool does not agree and it shows the same center wear patterns on bias or radial tires. The guys at the Discount Tire store I use are usually amazed that my front/rear wear is consistent. Their experience is that rears always wearing out faster than fronts for the large percentage of customers. I also use a 5 tire rotation regime as it nets more miles before replacement. I never run all the way to the wear bars due to the rain we have in the Puget Sound.
mapguy 07/05/19 07:41am Tow Vehicles
RE: Replacing Tires on my GMC

I rotate the tires at every oil change since new, I have the dealer due the oil changes right around 5000 miles. I run the rear tires at 80PSI and the front at 75PSI. Have about 5000 towing miles with the fifth wheel and then a few hundred miles with a utility trailer. No lead foot while towing the fifth wheel on the Interstate I set the cruise at 62 or 63, never over 65 except to pass if needed. Then back to the set speed. On back roads I due the posted speed limit. When not towing I due the speed limit or no more than 75 on the Interstate if the posted limit is 70. Hope this answers your questions. I'm just looking for a good set of tires, not what did you due wrong to cause the tires to wear down. Thank you to the ones that answered, looks like Michelin is the way to go. At those inflation levels running empty is like using 24 grit sandpaper on the tires. You will see excessive center wear on all 4 tires. Are you running tires that match the door frame sticker on the truck? if so run the fronts at the inflation level indicated on the sticker. There is no need to go above the door frame sticker on the front tires as you cannot load them enough to need anywhere near max inflation. If you truly want to get maximum mileage out of your tires -inflation must be set to match actual load. This means when running empty the rear inflation levels must be dropped to a lower level.
mapguy 07/03/19 09:39am Tow Vehicles
RE: 2012 Chevy Duramax Stabilitrak

Because the codes are different depending on who read them?? Lol Truth. Maybe a drivability issue would warrant a trip to the dealer. A Code is a Code when it is OBDII. Now what you do to troubleshoot it might be different if it is like a P300 are something like that where the code could be from multiple issues. Getting the code read at a place like Autozone starts you down a good path and it is free. I have a really good ABS/OBDII reader. OP you will need one that does ABS as well and is CANBUS ready. This is the way if you are a savvy DIYer, ls1mike is correct -it does take a decent code reader/scanner to trouble shoot the system problems the OP has. Oreillys and Autozone seem to be the best for getting scans at least in my area.
mapguy 06/28/19 09:26am Tow Vehicles
RE: Break controller

Should be fuse 13 in the left hand BEC (end of left hand dash)-10amp
mapguy 06/26/19 06:21pm Tech Issues
RE: 2012 Chevy Duramax Stabilitrak

So my 2012 D/A 2500 has the service stabilitrak light on. It came on 2 months ago after sitting in extreme heat of a parking lot in Orlando. Been fine in NY ever since. Now today 87 degrees and truck baked all day and the light is back on? Is it enough to take to a dealer? Not enough info to help. Get the trouble codes read by an auto parts store and get back to us...
mapguy 06/26/19 04:28pm Tow Vehicles
RE: Why a discrepancy between sticker payload & actual weight?

Washington State highway scales are calibrated, certified, and documented on a regular basis due to the nature of their use in interstate commerce and commercial vehicle enforcement. What good is an overweight ticket if the apparatus used to determine the weight was undocumented...…
mapguy 06/26/19 07:22am Tow Vehicles
RE: Break controller

Before replacing the brake light switch, check the fuse for the Center High Mount Brake Light. It is located in the fuse panel located on the end of the left hand dashboard end. Open drivers door and look at end of dash for access panel. EDIT - the CHMSL fuse powers part of the brake controller function on this era GM full size truck
mapguy 06/20/19 01:49pm Tech Issues
RE: Michelin LTX tire prices??

Sounds like you got tires. The difference between the original post tires was the Load Index rating Cheap tire was a 112 index number which is 2469 lb. capacity tire. Your truck needs a Load Index tire of 120/121/122 to maintain factory weight capacity.
mapguy 06/13/19 04:20pm Tow Vehicles
RE: Expedition w/Toy Hauler and 2 SeaDoo's

Before heading down the double tow route make sure that your combination is legal under CA regulations. Memory has it that in Cali the first trailer needs to be a fifth wheel and both trailers need brake systems. Using a launch cart will probably require a winch for loading. From experience (we have about 20 of the launch carts like in the first picture)get the large tire/wheel option if conditions will include anything beyond smooth pavement. Also, have some concerns regarding weight capacity/weight distribution for your toy hauler if the launch cart system is chosen. Might be a good idea to load your trailer normally for a trip -then visit the scale.
mapguy 06/12/19 08:12am Toy Haulers
RE: Attaching screws to aluminum floor joists

Use rivet nuts -that way you can r&r the dividing panels an endless amount of times. With sheet metal screws -you will get a limited amount of r&r's before threads are gone and larger screws are needed.
mapguy 06/07/19 02:30pm Do It Yourself Modifications and Upgrades (DIY)
RE: Mystery with Suburban furnace

HEAT RELATED FAULT ON CONTROL BOARD. PULLING FUSE RESETS THE CONTROL BOARD. REPLACE WITH A DINOSAUER BRAND CONTROL BOARD AND CONSIDER MOUNTING IN A REMOTE LOCATION. SEE THE DINOSAUER WEBSITE: http://www.dinosaurelectronics.com/Ignitor_boards.htm
mapguy 05/31/19 05:07pm Tech Issues
RE: Removable shore power cord inlet

Back in July, I switched to a SmartPlug and have been happy with it: http://learntorv.com/smartplug-50amp-inlet/ IMO if you are going to move to a marine type inlet -the Smart Plug is really the way to go. This is because of the minimal contact surface tension and area of the standard marine twist lock design.
mapguy 05/23/19 08:23am Do It Yourself Modifications and Upgrades (DIY)
RE: CP4.2 Bypass kit

There are 3 main attributes that can cause the fragile CP4 pump to fail: 1. Fuel Contamination (water, DEF, gasoline) 2. Air in the fuel line (typically happens after a filter change) 3. Manufacturing defects of the pump The best implementation for a CP4 pump is to have really good fuel filtration for both particulates and water. A lift pump to ensure good priming of the pump after a filter change, but still requires correct filter installation and the proper priming process in which a lot of people don't follow. On another note if anyone believes any auto manufacturer will cover a fuel system repair if there are any signs of rust, DEF and gasoline contamination are either pushing some false agenda or lives in some alternate universe. In addition there will be a time when your beloved warranty will expire and the issues I listed except for any manufacturing defects can still bite you and your wallet. Customers of the new 2019 Ram/6.7 cummins... tighten your seatbelt because it's going to be a bumpy ride. From my years of Fleet management my list of issues is slightly different than Fish's in regards to hp common rail diesel injections systems: 1. Water in fuel is the #1 enemy. Most OEM filters are marginally effective at extracting emulsified water. Any free water in fuel will compromise component life. 2. Debris in fuel - anything in the 5 micron size or larger will compromise component life. 3. Liquid contamination of fuel - like filling up fuel tank of a diesel truck with gasoline. This is an operator issue! 4. Air in fuel can be an issue but a liquid tight system goes a long way in preventing this problem. Most air in fuel systems are operator or maintenance related issues that can be avoided with proper practices. 5. Manufacturing defects - yes they happen but the % is low -if all the above factors are considered.
mapguy 05/23/19 08:06am Tow Vehicles
RE: Capping off a propane line: need tips and tricks!

Galvanized pipe is not used for propane or natural gas service. Use black iron cap and use a gas rated pipe dope like Rector Seal for the best results. Teflon tape is very difficult to use and insure that you have no minuscule leaks. That is -unless you over tighten the fittings as is very common.
mapguy 05/23/19 07:47am Tech Issues
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