Carburetor Rebuild?

[lamoz]

My 86 winni, has been giving me problems where it started by it shutting down on me..It lacks fuel to the engine. I've research it a bit and suggestions were dirty fuel filter, old fuel pump, electric pump at the tank.. So far I've changed the fuel filter, the mechanical fuel pump. I could not find an electric one and because it's a 22 footer it may not have one. I know is a fuel issue since i can spray starting fluid into the carb and get it running. I think my carburetor is next to get changed or rebuilt... any suggestions?

1986 Winnebago chieftain 22
454 with rochester carb
currently has 44K miles on it.

[BrianinMichigan]

Good to know, I will be dropping my tank this fall to change out the rubber hose/s. I'm sure mine is about due.

[lamoz]

I should have updated this thread..but didn't cause i had created a new one. I wasn't the carb after all, it ended up being a torn hose that connected the in tank fuel pump to the fuel rail coming out of the tank. The tear would suck air once the fuel was below half tank.

[rast]

Thanks for the follow up. I did not know they used a regulator unless there was an electric pump.

[lamoz]

So I ended up replacing the fuel pressure diaphragm and coach now seems to be without out problems. 🙂

[lamoz]

Ok, back to the drawing board as just re-installed my rebuilt carb.

things I've replaced so far.
Changed fuel filter at rail, at carb, new mechanical fuel pump, and rebuilt the carb.

Things I've done:
removed the fuel line at the carb, cranked the motor and it take a few seconds but finally fuel squirts out of the line..
I've gotten under the coach and followed the fuel lines and i see this



to me it looks like a fuel pressure regulator... anyone know?

I'm going to check the rotor cap as suggested and cross my fingers... My summer is almost over and I was hoping to have some fun with her but son far it has been anything but

[lamoz]

Thanks!!! I will give them a call 🙂
I have a place here that will do it for $190 but if I can save money I will 🙂

[rgatijnet1]

Check with this place:
Superior Carburetor Service
11005-49th Street North
Clearwater, FL 34622
727/572-7755

They rebuilt all of the carbs on any of the classic cars that I restored. They do accept carbs shipped to them from all over the country and they do great work. A complete rebuild of your carb will cost around $100 and it will come back to you looking like new.

[LVJ58]

lamoz wrote:
I already checked the fuel is getting to the carb. New fuel pump and filter, I'm going with the rebuild of carburetor as being my solution. It happened all the time not when hot and now it has a terrible time starting. I notice that when i pump the gas, nothing is injected into the carb and while it ran and idle high when cold, it would "diesel" out when I turned it off. Thanks for the input.

Sounds like you're on the right track going with the rebuild. I found the Rochester Q-Jet to be a great carburetor when dialed in properly..

Good luck & Safe Travels...:)

[lamoz]

I already checked the fuel is getting to the carb. New fuel pump and filter, I'm going with the rebuild of carburetor as being my solution. It happened all the time not when hot and now it has a terrible time starting. I notice that when i pump the gas, nothing is injected into the carb and while it ran and idle high when cold, it would "diesel" out when I turned it off. Thanks for the input.

[BrianinMichigan]

lamoz wrote:

Brian in Michigan wrote:
Did you change the fuel filter on the frame rail?
I had the carb on mine rebuilt last year. Out in California you should not have any problem finding a rebuilder. By getting mine rebuilt and the distributor recurveddistributor recurved it made a world of change power wise.

What's this? how do i do it?

Well, it entails changing the springs and maybe the weights inside of the distributor.
Here is the web site and company that I went to.Clicky He is about a 2 hour drive for me, I took it there and he sent it back. Total cost was about
$125 with shipping. He completely rebuilt it and recurved it. Been very happy with it.
Here is one of many posts that JIM83ITASCA has posted. ( he has since passed away)Clicky

[Nick-B]

Do not! I repeat - Do Not buy a rebuilt carb. Instead, have your existing carb rebuilt. Carburetors are very specific to the original configuration and rebuilds are more generic in application. Too much of a crap-shoot to get one that is jetted and configured correctly. Been there - done that - never again. The Q-Jet is also prone to have a warped top horn from Neanderthal mechanics overtightening the top bolts. Causes vacuum leaks and rich running.
Best of luck getting things sorted out.

[LVJ58]

Does carburetor accelerator pump squirt fuel into the carburetor venturi when you pull back on the accelerator rod/cable at the carb?

Rochesters have a fuel bowl float made of composite material that over time absorbs gas and rides lower in the fuel bowl when full failing to shut off the needle valve causing excessive fuel in the carb.

Also there's 2 small plugs in the bottom of the fuel bowl that sometimes leaks fuel into the intake manifold. Usually the symptoms of those problems is engine dieseling after shutting ignition off.

We had an 84 coach with the 454 and the engine kept missing out and finally shut down. Found high voltage had arced through the rotor material grounding out on the steel distributor shaft. Replaced rotor and all worked well again.

I highly recommend crankshop1000's advice to check for a lack of fuel, one step in the process of elimination in finding your problem...

Best of luck and keep us posted...

[crankshop1000]

Check for fuel flow while cranking the engine over.Disconnect the fuel line and direct any flow into a container.This will eliminate the delivery system from the cause.No fuel means the problem is from the pump back.Be careful we all know how dangerous gas is.

[sch911]

Is this happening when it's hot? Check for vapor lock.