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[GMCnet] Onan, again. [message #133680]

Thu, 07 July 2011 15:27

George Zhookoff

Messages: 398
Registered: December 2004
Location: Snellville, GA

Karma: 6

Senior Member

Seems whenever I go to a NASCAR race with the coach the Onan won't behave. Though I've run it at home all loaded up for hours. Well the onan will purr for over an hour. Then it hunts and dies. Restart hunts dies. Then starts runs solid for a while then hunts dies.

New plugs, plug wires, decarbonized heads, new control board, full up on oil.

Yes I have Petronixs in a box to be installed. I was hoping to install it in the driveway not here.

What do ya'll think?

George
78 EL II
Atlanta (Kentucky Speedway)
Nice visit with Byron Songer today
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Re: [GMCnet] Onan, again. [message #133682 is a reply to message #133680]

Thu, 07 July 2011 15:51

ljdavick

Messages: 3548
Registered: March 2007
Location: Fremont, CA

Karma: -3

Senior Member

Normally I would suspect the fuel filter or vapor lock but it's running too long for those...

Larry Davick
Fremont, California
The Mystery Machine
'76 (ish) Palm Beach

----- Original Message -----
From: "George Zhookoff" <gzhookoff@e2m.com>
To: gmclist@temp.gmcnet.org
Sent: Thursday, July 7, 2011 1:27:50 PM
Subject: [GMCnet] Onan, again.

Seems whenever I go to a NASCAR race with the coach the Onan won't behave. Though I've run it at home all loaded up for hours. Well the onan will purr for over an hour. Then it hunts and dies. Restart hunts dies. Then starts runs solid for a while then hunts dies.

New plugs, plug wires, decarbonized heads, new control board, full up on oil.

Yes I have Petronixs in a box to be installed. I was hoping to install it in the driveway not here.

What do ya'll think?

George
78 EL II
Atlanta (Kentucky Speedway)
Nice visit with Byron Songer today
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy

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Re: [GMCnet] Onan, again. [message #133684 is a reply to message #133680]

Thu, 07 July 2011 16:06

n6mon

Messages: 421
Registered: January 2004
Location: San Lorenzo, CA

Karma: 0

Senior Member

Could be a message. Maybe time to become a Formula 1 or SCCA
fan?

On 7/7/2011 1:27 PM, George Zhookoff wrote:
> Seems whenever I go to a NASCAR race with the coach the Onan won't behave. Though I've run it at home all loaded up for hours. Well the onan will purr for over an hour. Then it hunts and dies. Restart hunts dies. Then starts runs solid for a while then hunts dies.
>
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Terry Taylor
'74 ex-Eleganza SE
San Lorenzo, CA
http://www.n6mon.org
http://dldesignstore.com

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Re: [GMCnet] Onan, again. [message #133685 is a reply to message #133680]

Thu, 07 July 2011 16:10

Dennis S

Messages: 3046
Registered: November 2005

Karma: 2

Senior Member

George Zhookoff wrote on Thu, 07 July 2011 15:27

George,

At home when you have no problem -- is the coach sitting level? I presume you are level now when it is happening. I wonder if the gas tank is just marginally full enough? Even walking around in the coach might allow air into the line.

Anyway -- can you lower the rear of the coach slightly and see if it continues? And add a couple gallons of gas.

Usually intermitent problems like this seem to be electrical -- coil, wiring, etc....

Dennis

Dennis S
73 Painted Desert 230
Memphis TN Metro

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Re: [GMCnet] Onan, again. [message #133687 is a reply to message #133680]

Thu, 07 July 2011 16:18

gordh1

Messages: 332
Registered: February 2011

Karma: 0

Senior Member

George Zhookoff wrote on Thu, 07 July 2011 16:27

Seems whenever I go to a NASCAR race with the coach the Onan won't behave.

Consider another form of motorsports entertainment perhaps? Very Happy

Just joking but you knew that. Wink

Quote:

What do ya'll think?

If you have fuel (and you're *really* sure you have fuel), and if you have spark (ditto) you may have a tight or sticky valve. Fuel and spark are easy checks once it quits. I've never played with an Onan so I can't add much beyond saying what I have - which is a known symptom as an engine heats up enough to close the clearance on an intake valve and then that's that - nothing gets sucked in till it cools enough to let the valve do its job. Assure the first two issues pass ok though...easiest. Wink

HTH,

Gord

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Re: [GMCnet] Onan, again. [message #133704 is a reply to message #133680]

Thu, 07 July 2011 17:24

WD0AFQ

Messages: 7111
Registered: November 2004
Location: Dexter, Mo.

Karma: 207

Senior Member

George, Larry is an expert on those Pertronix. When he gets there let him take a look. Maybe yall can install it.
Dan

3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer

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