Thread Tools Search this Thread Display Modes
Old 06-24-2018, 08:42 AM   #1
3 Rivet Member
Vintage Kin Owner
1987 32.5' Airstream 325
Windsor , Ontario
Join Date: Dec 2006
Posts: 138
454 engine trouble staring

I have 1987 325 MH.

After sitting for a while it will not start up without putting gas in the carb. Motor turns over fine and runs great. Just does not seem to get fuel after sitting.
It will start up at the end of a weekend or one week camping trip.

Just a bother to start it this way and I know it is not particularly good for the motor.

Filters good, fuel lines are leak free.

Any suggestions welcome, thanks in advance for your help.
realpank is offline   Reply With Quote
Old 06-24-2018, 08:47 AM   #2
gunner's Avatar
2000 35' Land Yacht XL w/2 slides
Greenville , Ohio
Join Date: Mar 2006
Posts: 345
Should have electric fuel pump that should provide fuel to the carburetor when the key is turned on. Check the fuel pump to make sure it is pumping fuel, might have to disconnect fuel line to check. My 1984 the pump would run but not pump fuel, replaced and everything was fine.
2000 Land Yacht XL 355
gunner is offline   Reply With Quote
Old 06-24-2018, 09:27 AM   #3

2003 25' Classic
Zanadude Nebula , Milky Way
Join Date: Jun 2007
Posts: 16,054
Images: 1
It could be your losing "rest pressure" in the system, ck valve on the fuel pump may be bad....weak grey cells tell me it should be on the outlet nipple.(been awhile)😂
Carb bowl leak possible, but you would notice smell or see it.

"Any nation that can survive what we have lately in the way of government, is on the high road to permanent glory."
Molly Ivins

"Mary-Jane....'cuz 2020 sucks"

ROBERT CROSS is offline   Reply With Quote
Old 06-24-2018, 02:50 PM   #4
4 Rivet Member
1987 34.5' Airstream 345
Menomonee Falls , Wisconsin
Join Date: Jul 2010
Posts: 409
A couple of things to look for. 1 your aux fuel pump by tank. Turn the key, it should fire up and hum. No hum, tp it with the end of a screwdriver, sometimes they get sticky from sitting.
2 old gas .
3 carb is original? If so there is a rubber insert on the jets. These things went bad, and fuel would drain off the bowl. Made for hard starts. . Rebuild or replace carb. Go edlelbrock or fuel injection. Quad rakers were pretty old technology.
4 upon starting unit, spray some starting fluid down carb. If it fires right up or acts like it wants to go, it's not anything electrical, it's fuel related. My bet, aux fuel pump is acting up, and maybe your engine fuel pump is dying. The aux pump is to get fuel to the engine pump. If it is, but the engine pump is dead, you still won t start. That could very well be the problem. The aux pump will eventually get fuel to the carb, it'll bypass the engine pump. But that could take a couple of minutes. Hope this helps DJ
davejay is offline   Reply With Quote
Old 06-25-2018, 02:19 PM   #5
3 Rivet Member
1999 28' Excella
Lake Mary , Florida
Join Date: Mar 2008
Posts: 122
454 Big Block

You probably have GM big block with carburetor. If so, the gas is simply evaporating from the carb. You need to start the vehicle EVERY WEEK. And NEVER, EVER pump the gas pedal before starting. T

These older carbs had accelerator pumps, which also go dry. If you pump the throttle, the accel pump chamber is dry and you will just abrade the rubber seal. There are two ways to start these older engines. Either throw some fuel down the throat of the carb, or crank it for 10 seconds, wait, crank again for 10 seconds and continue to repeat til she wants to fire. Then, and only then, can you pump the gas pedal
suncoasteng is offline   Reply With Quote
Old 06-26-2018, 07:47 AM   #6
3 Rivet Member
Vintage Kin Owner
1987 32.5' Airstream 325
Windsor , Ontario
Join Date: Dec 2006
Posts: 138
454 engine trouble starting

Thanks everyone for the responses,

All very common sense.

I think it is mostly from sitting and evaporation. It does start and run very well once it has started.

Cheers to all,
realpank is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Late 454 vs early 454 & 400 vs 4L80E gbell Mechanics Corner - Engines, Transmission & More... 33 07-01-2017 05:59 AM
454 trouble johndes Mechanics Corner - Engines, Transmission & More... 32 02-20-2014 03:51 PM
Question on 454 MH Engine RonJudi Mechanics Corner - Engines, Transmission & More... 7 01-20-2004 10:54 AM
454 engine questions Curtis-79MH Mechanics Corner - Engines, Transmission & More... 10 10-06-2003 06:22 AM
Argosy 454 engine repair in Amarillo TX saxonsraven General Motorhome Topics 5 08-01-2003 05:08 PM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 01:00 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.