rusty360 Posted January 11, 2020 Report Share Posted January 11, 2020 So with the wife's old daily. Some times it wont start due to I've worked out the fuel pump not running to prime the system or running to supply pressure. Turn the key off and on it primes and pumps up like normal. Doesnt happen every start just now and then. Any ideas? Has never cut out or stopped once running. Fuel pump has been replaced, I'm thinking it could be the relay? Quote Link to comment Share on other sites More sharing options...
Taistorm Posted January 11, 2020 Report Share Posted January 11, 2020 Might be an idea to check all the terminals and the relay. Quote Link to comment Share on other sites More sharing options...
Sunbeam Posted January 11, 2020 Report Share Posted January 11, 2020 11 hours ago, rusty360 said: Fuel pump has been replaced, I'm thinking it could be the relay? I think you’re almost certainly right. Would be my first suspect. 1 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted January 11, 2020 Report Share Posted January 11, 2020 The mrs vtec crx developed in intermittent fault like this. Apparently they were prone to developing dry joints inside the fuel pump relay. (It was hidden in an impossible location, I could hear it, but not see it) pulled it.out, and resoldered them and it never gave trouble again. 1 Quote Link to comment Share on other sites More sharing options...
rusty360 Posted January 11, 2020 Author Report Share Posted January 11, 2020 1 hour ago, RUNAMUCK said: The mrs vtec crx developed in intermittent fault like this. Apparently they were prone to developing dry joints inside the fuel pump relay. (It was hidden in an impossible location, I could hear it, but not see it) pulled it.out, and resoldered them and it never gave trouble again. It must have been quite big then? I'll have a looky at this. Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted January 11, 2020 Report Share Posted January 11, 2020 Decent sized box yes. But to be fair, its turning the fuel pump on. So it needs decent current carrying capacity? Quote Link to comment Share on other sites More sharing options...
Ranter Posted January 12, 2020 Report Share Posted January 12, 2020 Have you tried both keys? Next time it doesn't prime check for security light on dash. Quite common for Hyundai security system to play up basically the main reason the older ones won't start that I've seen. Quote Link to comment Share on other sites More sharing options...
rusty360 Posted January 12, 2020 Author Report Share Posted January 12, 2020 1 hour ago, Ranter said: Have you tried both keys? Next time it doesn't prime check for security light on dash. Quite common for Hyundai security system to play up basically the main reason the older ones won't start that I've seen. Very interesting? So the light on the dash should go out? Or stay on when trying to start? Quote Link to comment Share on other sites More sharing options...
rusty360 Posted January 12, 2020 Author Report Share Posted January 12, 2020 It happens bugger all so could be a tricky one to find, will try when I get home tonight thou Quote Link to comment Share on other sites More sharing options...
Ranter Posted January 13, 2020 Report Share Posted January 13, 2020 Light stays on, doesn't sound like the problem because usually they just won't start. Normally if it is the fault you can just hard wire the plug to immobiliser and it solves it, if it doesn't you don't want to know what Hyundai want for a new module and keys programmed. 1 Quote Link to comment Share on other sites More sharing options...
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