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Old 09-14-2016, 06:52 PM   #211
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Greg, I just checked the two quadrajets I had sitting the shelf and they were both as shown in Peter's picture although one was missing the spring.

Brad
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Old 09-16-2016, 08:25 PM   #212
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Tried to replace the fuel inlet nut this week. Parts guy ordered it but, when it came in it was too small. I would feel more comfortable with fresh seals on both ends. I will keep looking.
I could not get the back-check in the filter to work to my satisfaction so I just took it out and threw it away. Not sure why I need a back-check in the first place.
Noon kickoff tomorrow. I will find out in the morning.
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Old 09-18-2016, 01:36 PM   #213
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Th egood and the bad

Another successful trip. To the game and back 280 miles, 9.2 mpg. Took a 5 gallon can of gas with me so I felt confident to drive it until the gas gauge read empty. Sure enough , drove it until the gauge read empty then filled up. Put 30.5 gallons in. That seems about right. its a 40 gallon tank.

The stumbling off idle gets better by the mile. It is just a slight hesitation now.. I have been putting Lucas injector cleaner in the gas and it seems to be cleaning things out.

Now the bad, After it ran flawlessly for the 120 mile return trip it acted up again. When I got off the interstate I drove a couple miles through town and when I got to the edge of town and started to accelerate back to 55mph it stumbled and missed like it was running out of gas .. After about 30-45 seconds it started running again and I drove 6 more miles to home with no issues. At home in the drive I left the engine running so I could check the trans fluid. After a couple minutes I attempted to pull it up to the shop and it just died and would not restart. After about 30 minutes I started it back up and in ran flawlessly for a 10 minute drive???????
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Old 09-18-2016, 02:13 PM   #214
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Greg, does your coach have an electric fuel pump? I glanced back through a number of pages of your thread and didn't see any mention of one.

If there isn't one I'd suggest adding one and if there is one you might check to see if it's working properly. Your symptoms sound a lot like vapor lock.
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Old 09-18-2016, 02:45 PM   #215
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If it is vapor lock, you might want to try insulating the hard fuel line that runs from the mechanical fuel pump to the carburetor. I went coast to coast and back fighting symptoms like yours. I could drive on the highway all day, but when I backed off the gas the fuel in that line would slow down and heat up. When I hit the gas again it was trying to run on bubbles, and would act like it was running out of gas until it worked the bubbles out. Put header wrap around that line, and the problem is gone.
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Old 09-18-2016, 05:06 PM   #216
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Quote:
Originally Posted by Waipio Rim View Post
If it is vapor lock, you might want to try insulating the hard fuel line that runs from the mechanical fuel pump to the carburetor. I went coast to coast and back fighting symptoms like yours. I could drive on the highway all day, but when I backed off the gas the fuel in that line would slow down and heat up. When I hit the gas again it was trying to run on bubbles, and would act like it was running out of gas until it worked the bubbles out. Put header wrap around that line, and the problem is gone.
You and I are thinking alike at this point. It has to be 85 degrees or hotter to get it to do this. I generally try to drive before daybreak because I do not have dash air and the traffic is lighter that time of day. Driving 60 mph tends to annoy my fellow motorist. Header wrap aaahh!!!, on my way to the parts store.

Brad , I do not have any fuel pump besides the mechanical pump on the side of the engine. I was hoping I could stay away from adding an electric pump but, that may be my next move.
Thinking maybe I should join the Good Sam Club before I try to drive 500 miles to Memphis next Saturday
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Old 09-18-2016, 06:20 PM   #217
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Electric fuel pump

FWIW, our coach has a single electric fuel pump located on the drivers side (same side as fuel tank) that is then piped up and alongside the linkage side of the Quadrajet, then U-turns into a screw-in fuel filter at the carburetor body.

the mechanical pump removal and the electric pump installation was done by a PO, Dan.

we drove this coach from Los Angeles in late September in some warmish (90 degree plus) temps over the mountains to the Grand Canyon, then onward to the Albuquerque Balloon Fest.

after the baloon fest, we made our way back to the east coast, and we've never experienced anything that looks like a fuel problem in about 5,000 miles!

ymmv!
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Old 09-19-2016, 05:13 PM   #218
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Originally Posted by Gregsch View Post
You and I are thinking alike at this point. It has to be 85 degrees or hotter to get it to do this. I generally try to drive before daybreak because I do not have dash air and the traffic is lighter that time of day. Driving 60 mph tends to annoy my fellow motorist. Header wrap aaahh!!!, on my way to the parts store.

Brad , I do not have any fuel pump besides the mechanical pump on the side of the engine. I was hoping I could stay away from adding an electric pump but, that may be my next move.
Thinking maybe I should join the Good Sam Club before I try to drive 500 miles to Memphis next Saturday
I believe the GM approved fix for vapor lock was to add the electric pump to the coaches. The overall installation of the pump is actually rather easy. One pump, one relay and some wire is about all you need to get the job done.
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Old 09-19-2016, 05:17 PM   #219
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Thinking maybe I should join the Good Sam Club before I try to drive 500 miles to Memphis next Saturday
What route are you taking? I live near Richmond Kentucky just off of I-75, if you need anything along the way let me know
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Old 09-20-2016, 04:24 PM   #220
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We will be taking I-75 to I-71 to I-65 to Bowling Green KY. Cannot pass up the opportunity to visit The National Corvette Museum. Then on to Memphis Friday night or Saturday Morning. 7:00 kick off.
Doesn't look like that is real close to you but, I do appreciate the offer.
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Old 09-20-2016, 07:51 PM   #221
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insulated the fuel line

Bought this insulation to wrap the fuel line from the carb to the fuel pump.

Removed the fuel line at the carb inlet and slipped it down to the fuel pump it was challenging but I finally got it pulled all the way down by snagging it with an over size dental pick and pulling it down. In the process I knocked the heater hose off the water pump fitting and coolant was soon everywhere. Here we go again! Off comes the front wheel and the alternator and I still can barely access the fitting. Apparently the last guy to install the heater hose did not have it pushed all the way on when he tightened the clamp. You can barely see the thing, working mostly by feel. Another 15 minute task that ends up taking 4 hours.
Had a difficult time tensioning the alternator belt but, I got it. While I was there I checked the hydro boost belt. Sure enough that explains why it squeals a little every now and again. Is it possible to tension the hydro boost belt without removing the radiator?
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Old 09-21-2016, 03:55 PM   #222
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Quote:
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Bought this insulation to wrap the fuel line from the carb to the fuel pump.

Removed the fuel line at the carb inlet and slipped it down to the fuel pump it was challenging but I finally got it pulled all the way down by snagging it with an over size dental pick and pulling it down. In the process I knocked the heater hose off the water pump fitting and coolant was soon everywhere. Here we go again! Off comes the front wheel and the alternator and I still can barely access the fitting. Apparently the last guy to install the heater hose did not have it pushed all the way on when he tightened the clamp. You can barely see the thing, working mostly by feel. Another 15 minute task that ends up taking 4 hours.
It sounds like that hose was looking for a suitable time to pop off so I hate to say this but I'm glad you had this problem now rather than on the road.

Quote:
Had a difficult time tensioning the alternator belt but, I got it. While I was there I checked the hydro boost belt. Sure enough that explains why it squeals a little every now and again. Is it possible to tension the hydro boost belt without removing the radiator?
Yes, it's definitely possible to tighten with the radiator installed

There is one bolt and one nut that have to be loosened before you can adjust the tension on the belt. There is a 3/8" nut (9/16" wrench) on the lower backside of the ps pump that you access through the left hand front wheel well. There is also a bolt on the front of the ps pump bracket (I think it requires a 3/4" socket) that you access by laying on top of the engine.

Loosen those two fastners and then with a 1/2" ratchet placed in the square 1/2" hole on the power steering pump bracket. Place the ratchet drive in the square hole and use the ratchet handle as a tension lever. You can use this to also release the tension on the belt during installation.

Did this to Peanut and my Argosy just a month or two ago.

Brad
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Old 09-21-2016, 05:33 PM   #223
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Quote:
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... In the process I knocked the heater hose off the water pump fitting and coolant was soon everywhere. Here we go again! Off comes the front wheel and the alternator and I still can barely access the fitting. Apparently the last guy to install the heater hose did not have it pushed all the way on when he tightened the clamp...
Greg, I would consider that a gift to have it happen in your driveway instead sooner or later going down the road.
Brad described the tightening of the power steering/hydro boost pump very well, just do not be tempted to use the tank as leverage for tightening. Its right there and it will screw up your tank seals.
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Old 09-21-2016, 08:02 PM   #224
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I always seem to be lucky that way. When the bake line rusted through on my van it made itself apparent when I backed out of the garage. Brought my son's car home from college to replace the radiator and when I backed it up on the ramps the brake peal went to the floor. No sign of brake trouble up to that time, the brake hose at the caliper just let go.
That being said I just subscribed to Good Sam Roadside Protection.
I just keep thinking of TAP and his misfortunes.
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