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What happens when a fuel pump check valve fails? I may have this problem

posted by  david hunter on  Sat Mar 15 00:52 CST 2003
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last visit: Mon Jun 30 22:10 CST 2014
[RELATED]

Hotstart, that is one of the purposes of the valve.
The check valve keeps the fuel rail under pressure for a while after shutting down. Under pressure the fuel cannot vaporize and cause a "vapor lock". This will usually only happen under very hot conditions. On our fuel injected cars vapor in the line would only delay a start, not prevent.

It also allows fuel pressure to build faster resulting in faster starts.
--
David Hunter






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