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On a stock turbo set up the top boost pressure looks a little low; should be 18-20psi. Over 20psi and the ECM defuels the engine unless there is a "boost fooler" installed. Easy to check the turbo for play. Usually a turbos with excessive radial play (side to side) makes noise accelerating when drive pressure is high. Second thought is a bearing in the transmission. When coasting in neutral torque loading on internal parts is reduced.

I did this in my first attempt to do a by pass and it is installed on my truck; it work fine but not KISS. Here is the article. https://mopar1973man.com/cummins/articles.html/24-valve-2nd-generation_50/51_engine/electrical/grid-heater-bypass-r618/

NO big deal. A few people here run the grid heaters disconnected in the summer or have done this modification. https://mopar1973man.com/cummins/articles.html/24-valve-2nd-generation_50/51_engine/electrical/grid-heater-bypass-simplified-r662/

I'm running two 6V 220amp batteries, a 2000watt invertor, a 2200watt generator and these LED lights in the super white 6000-6500K color. They are bright. I need all the light I can get. Last trip was 10 days dry camping with no problems. https://www.amazon.com/dp/B07V8FQMY2/ref=sspa_dk_detail_5?psc=1&pd_rd_i=B07V8FQMY2&pd_rd_w=b5I1t&pf_rd_p=5d846283-ed3e-4512-a744-a30f97c5d738&pd_rd_wg=jtgi4&pf_rd_r=80K77V4BPD69K3G9ED97&pd_rd_r=b49ee4ea-c460-4035-81b4-a51801431efa&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEzMEVPM1I4SDFUNlQxJmVuY3J5cHRlZElkPUEwNzc0MTIzMU1TWlBFQUowRk45WCZlbmNyeXB0ZWRBZElkPUEwMDQyMTE1MTlJRzYwUTVKOFU0UiZ3aWRnZXROYW1lPXNwX2RldGFpbF90aGVtYXRpYyZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

At 800RPM, 0mph live data shows MAP being 14.28PSI 59inhg-29.92inhg = 14.28psi 2.036inhg/1psi It should be closer to 30inhg or 0psi. looks like the MAP sensor is reading high. At 75inhg boost is 22.1psi

What happens if you put it in neutral when coasting to a stop?

Remember, you have the new transducer and Borg-Warner solenoid that I tried in my trans.

I have a cover for my 27' 5er i bought years ago. I put it on once to protect it from the sun in SO Cal, no snow at my house. PIA to do by myself and I would have to take it off every few months since I use the trailer year round. It's been stored in the garage ever since. If you have someone to help put it on and take it off the job wouldn't be to bad. For snow country how about an open sided pole barn with a 1n12 shed roof. The initial cost would be higher than a tarp/cover. It might be cost effective thou when you add the cost of several covers and trailer roof repair/replacement verse amortizing the cost of the pole barn over the life of the trailer of say 20 years.

Looks like a trip to @Dynamicis in your future.

Not everyone can store their RV where they can plug the 12V converter in to a 110V outlet. Not everyone who does will diligently check the electrolytes monthly.

https://scanneranswers.com/how-to-store-a-car-battery-for-winter-and-long-term/ I think this would apply to RV batteries also.

Best to disconnect battery from camper because of parasitic loads drawing them down and causing sulfation. A battery tender should be used for storage to keep the charge up. If where you live gets really cold it is recommended to remove the batteries and store them inside.

What kind of engine? Sounds like he got hosed. Five hours labor, $1000 for a boat motor flush, that's a heart attack.

That's all I've run for over 10 years. I'm going to Walmart today to buy some before the price goes up.

i was in my local Walmart store today and the 2 stroke was $13.88/gal. It's hit or miss when they have it. You can check your local store there in Crosby. A Walmart with an auto service center in it has a better selection and stocking than one that doesn't.

Your wallet gets lighter faster. Can you order it? https://www.walmart.com/ip/Super-Tech-TC-W3-Outboard-2-Cycle-Engine-Oil-1-Gallon/16795065?wmlspartner=wlpa&&adid=22222222227000000000&wl0=&wl1=g&wl2=c&wl3=42423897272&wl4=pla-51320962143&wl5=9031313&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=online&wl12=16795065&veh=sem&gclid=CjwKCAjwyIKJBhBPEiwAu7zll-1nugCWRACNbos5BHlG-0_o_dUouj0r0m4Am8pcvlDV8YfjMixw6xoCWEQQAvD_BwE&gclsrc=aw.ds

Things that cause gray exhaust smoke are in this link below. https://motorcompanyleicester.co.uk/what-causes-grey-smoke-from-a-diesel-engine/

Be aware that emission testing in California now test the ECU/PCM for none CARB approved programing. If unapproved software is found the vehicle will fail even if the exhaust gases meet standers. The ECU/PCM must be returned to factory specs before retesting can be preformed. In the future, other states are sure to incorporate this software test in their emission inspection.

It's from my privet collection. I'm on desk top or my lap top 99% of the time.

Sometime I find it is better to remove all the hacked up, mismatch wires and start fresh. Take a look at this article and see if it helps. https://mopar1973man.com/cummins/articles.html/24-valve-2nd-generation_50/51_engine/59_fuel/installing-protective-lift-pump-relay-r501/

Here is my truck @Mopar1973Man place getting a new right hub with about 120K on the clock.

It may be a wheel bearing going bad. Drive on a windy road 30-45MPH letting off the power and coasting into the corners. If there is a bearing starting to go bad you will hear a grinding noise when it gets "loaded" it the turns. So on a right turn the left bearing gets loaded and listen for the noise. As a left bearing get worse it will make noise on a straight drive but go away on a left turn when it is "unloaded". The opposite tests will hold true for the right side bearing.

I pulled the transmission in my yard by myself, I was 67 when I did it. It was then strapped to a pallet and picked up by the trucking compony Saia. A week later the transmission was dropped off at a friends shop, North County Smog & Repair, where he helped me install it.

I had @Dynamic build mine. I shipped it from San Diego county to his shop in Newman Lake, WA. Line pressure 100PSI in drive at idle and 170PSI wide open. Exhaust brake works great with it locked up even in 1st. Both @JAG1and @Mopar1973Manhave driven it and gave excellent reviews.