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april10's avatar
april10
Explorer
Nov 26, 2013

starts fine, smooth idle 30secs, rough idle, then dies

We have a 1990 Southwind motorhome. Ran fine until recently. Now, it starts right up, runs good for about 30 sec., then the idle gets rough, the motor sounds like it's surging, and it dies. My husban...
Class A
1995brave's avatar
1995brave
Nomad
Dec 06, 2013
sjholt wrote:
I think the problem is in the fuel pump relay system.
When you first turn it on the pump pressurizes and then when the main relay is suppose to run the pump it doesn't.
Check you fuel pump relays.


Nope! The fuel pump runs with the oil pressure switch. The relay is only used when starting, when oil pressure builds it closes the oil pressure switch and runs until the ignition switch is turned off or you lose oil pressure.

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