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Old 12-25-2015, 08:27 AM   #1653
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Originally Posted by bkahler View Post
FYI, here's what the air pressure transducer looks like. Unfortunately it has NO part numbers or identifying information on it.
Attachment 254484
Here is a VDO site with pressure senders but it's all greek to me other than 150PSI would cover my compressors output and 1/4" NPT would match my lines but what is a floating ground....dual floating ground, warning points and all the other gobbledygook specs?

Pressure Sensors & Switches | Sensors | VDO Instruments and Accessories

Pressure Sender 150 PSI 1/4-18NPT 29/20 | Pressure Sensors & Switches | Sensors | VDO Instruments and Accessories

Maybe someone should start a whole new thread on gauges, electric or cable, sending units and pressure senders for our rigs.

Cheers
Tony
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Old 12-25-2015, 08:32 AM   #1654
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We have the "Extra Gauges" thread over in the Mech section... I guess that's appropriate.
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Old 12-25-2015, 05:27 PM   #1655
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Happy Holidays everyone!

Finally had time to post my update from yesterday.
PS pump looks good, and not see any leaks, which will be the first time since I owned her!

Installed the Innovate Fuel/Air meter and calibrated it.
Temporarily installed it where the inside/Outside temp gauge was...


It is telling me that I am way fat or rich at idle at between 13/ and 11/1 and it drops to 10/1 or 9/1 at 2000rpm no load.
It should be 14/1 or 15/1 at idle and similar at a light throttle.

Research tells me that it maybe the fuel pressure too high(which is), So I will reset that tomorrow. Or failing that, it might be the float level is set too high, or the power valve sticking or leaking. Having dropped a screw into an intake before(retrieved!), I will pull the carb off to check the latter!
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Old 12-27-2015, 12:50 PM   #1656
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Did some reading and online diagnosis for my Quadrajet...
I am more educated now... maybe...

Armed with my new knowledge, it was an interesting day yesterday.
Double checked my Fuel Pressure.
My Injection pressure tester is way to high, and its first increment is 5psi.
With the rear electric pump on, it was reading closer to 10, so lets call it 8/9psi.
With the pump off, it was maybe 2psi.
Way to high... they suggest 4.5psi for a quadrajet.
Installed my Holley FPR and gauge, which reads to 10psi.
The gauge it seems, is DOA, and will have to be returned, so I set my FPR at just under 5psi.


I instantly noticed my A/F ratio come up from 12/1 to 18/1 and the engine stalled out. I had reset the idle mixture screws almost all the way in to try to lean out the mixture before. I reset them to 2 turns out from seated, and the engine restarted fine. Some minor adjustments had is reading 14/1 which is ok, but the engine was still not sounding great and had a high speed vibration and was hunting.
It was better for sure, but not right. I checked my choke was off, and held a steady 2000rpm, and I was still 11/1 A/F.
Then I noticed a slight weep of fuel around the accelerator pump.
I had just read that this is a sure sign the float setting to too high. This results in the fuel level being to high and "Spilling" out through the jets and bleeds rather than being pulled by vacuum.
Pulled the carb off the manifold and brought it home.

On the bench, I took off the hat, and had a quick look at the float level...
Cant check the level, and photgraph, so float is black thing in the middle.


It should be 3/8 down from the top of the casting... and mine was not.
My fault, but I hope this will make it right.
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Old 12-27-2015, 06:19 PM   #1657
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Nice..... lack of info Brad...
I guess I will be running 1/4 airline for 30'!
What about tapping into the airline that is under the drivers side panel forward that goes up to the air horns? This way you can pipe in a valve to secure it if your air horn diaphragms ever get stuck!! That's what I plan on doing since I need to replace the solenoid that opens and closes when the steering wheel horn section is depressed...
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Old 12-27-2015, 06:20 PM   #1658
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Lots of great work! I need more time to absorb it all!!
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Old 12-27-2015, 08:20 PM   #1659
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What about tapping into the airline that is under the drivers side panel forward that goes up to the air horns? This way you can pipe in a valve to secure it if your air horn diaphragms ever get stuck!! That's what I plan on doing since I need to replace the solenoid that opens and closes when the steering wheel horn section is depressed...
I dont have airhorns....
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Old 12-29-2015, 05:48 PM   #1660
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Pushing hard to wrap up the last few details before I hit the road for the storage swap.
Doghouse redo with MLV underway.


Checked the float level... way off... no idea what I was thinking!
Done, at 3/8" or 9.5mm.


That reset, I buttoned up the carb and refitted it.
Rechecked the fuel pressure, and its about 5psi.
Started and ran better, but something is still not right.
I can get 14/1 Air/Fuel now, but at 2000rpm its still too rich at 12/1. Also i cant get it to idle at less than 1000rpm.
Better a touch to rich than too lean!
Good enough to move.

That wrapped up, I fixed the headlights(ground wire was loose).

Then got up and fitted my new LED Clearances.
Looking great!
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Old 12-29-2015, 06:16 PM   #1661
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I dont have airhorns....

What???? I hope you at least got a working door bell! 😁


Sent from my iPhone using Airstream Forums
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Old 12-29-2015, 06:21 PM   #1662
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On a seperate note, I am not happy with my alternator output.
Watching my volt gauge I am good at 13.5v with no lights, but with headlamps on it dips to 12.5 or less.

I went thru my receipts and the alternator was replaced in 2006 at Indian river Battery in FL, and it says 100amp.
The battery power cable is beefy, and must be a 2gauge... so that should be ok... which leaves the external Voltage Regulator.

This is the beast.



I just ordered a replacement, and the seller says they come set at 14.2v, but he can can change that up to 14.9.
Wondered if say 14.5 would be better?
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Old 12-29-2015, 08:15 PM   #1663
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Pushing hard to wrap up the last few details before I hit the road for the storage swap.
Doghouse redo with MLV underway.

Steve,
I think you said you already had material for your doghouse insulation, but here is another one that works very well, especially in really tight spots. Its a little pricey , but works real well for all kind of applications
https://www.designengineering.com//c...hesive-backing
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Old 12-30-2015, 08:26 PM   #1664
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Motorhome made it to new storage. More later!
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Old 12-30-2015, 11:41 PM   #1665
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Home!

What a day!
Found a great storage, and we decided to go for it today.
Did some final checks, at the old storage, and set off for home, which was on the way to the new storage.
Here she is, looking a little faded/dusty outside our home, while I did some final checks before the 45 mile run to the new home.
Note the GF giving me the"Are you done fiddling, lets get going look"...



Using my Psiclops XL180 tire pressure gauge for the first time(A must own item), I set both the tag axle tire pressures together at 75psi, and then tried to set the drive axle pressures... The valves were impossible to reach! I had paid a tire shop to do them before, but not myself. I managed to check the outer tires, and read 65psi... That would have to do. Tires are toast anyways. 10 years old, and have some sun cracking, I knew I would nurse them this one last trip before they are replaced, with the Alcoa's and new tires. I will be sure to have the valves setup for access!
Set the fronts at 75 too, and the front airbags at 55.

The drive from here to storage is across a toll road with a 2000' elevation climb, and decent. I was a little worried.
With the GF driving her Range Rover behind, I set off, and held a steady 50/55.
I noticed a weird noise once I got going, and thought it was the PS pump, which worried me... but after a few miles, I realized it was the microphone on the rear view camera picking up cars passing me!
The climb out of Orange County is enough to pull my Mercedes Diesel down to 45mph, yet the MH blasted out and over, and barely seemed phased... I held a steady 50, with just a bit more gas and no downshifts. Temp held steady between 200/210. The downgrade was treated with respect, and the brakes felt fine.
The new 7 blade fan is noisy, for sure, but not sure if its any worse than the flexfan. We sat in traffic for a while and you could hear it working hard, so I think the viscous coupling is good.
Arrived, at the storage and was just parking when the GF called me in panic, crying. As she pulled up at the storage, her Range Rover brakes failed! Lucky, she was going slow. Looks like the ABS pump failed...

So, we got the MH put away safe, but came home with the Range Rover on a Tow Truck!
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Old 12-30-2015, 11:56 PM   #1666
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Steve,

Congratulations on your successful journey home! Been following your progress, and truly admire the energy and effort that you've recently put into that coach to make it happen. Sorry to hear about the Rover's brake failure, but one thing at a time. I know you'll have that fixed in a flash. Happy New Year!

Charly
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