NeilB Posted September 16, 2018 Report Share Posted September 16, 2018 Hi all, just after a little advice. I've just had a new install of a g4+ in a R34 GTR which has an issue with starting, everything was fine beforehand. When starting, the engine turns over strongly and fuelling is fine, it just does not start, as if there is no spark. If you then put a booster on the battery it will start and will then also start straight away after its been running. The battery is new and uprated. I was told this was a common issue with the GTR and link ecu's, that when the battery drops a little, it does not start ?? Im no expert but find this hard to believe and wonder if the ecu has been set up correctly or if there is anything I can do? Any help will be much appreciated! Kazu 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 17, 2018 Report Share Posted September 17, 2018 Check voltage on pin 45 (signal from ign switch) and pin 49 or 59 (main supply from ECCS relay) during cranking. It is common to find one of these is well below batt voltage so the ECU drops out during cranking. The ignition switch circuit is stupid in these cars as the fuel pump relay and a few other high current devices all connect directly to it so it only needs a slightly dirty contact somewhere and you will get a large volt drop in that circuit. Quote Link to comment Share on other sites More sharing options...
AbbeyMS Posted September 29, 2018 Report Share Posted September 29, 2018 On 9/16/2018 at 10:27 PM, NeilB said: Hi all, just after a little advice. I've just had a new install of a g4+ in a R34 GTR which has an issue with starting, everything was fine beforehand. When starting, the engine turns over strongly and fuelling is fine, it just does not start, as if there is no spark. If you then put a booster on the battery it will start and will then also start straight away after its been running. The battery is new and uprated. I was told this was a common issue with the GTR and link ecu's, that when the battery drops a little, it does not start ?? Im no expert but find this hard to believe and wonder if the ecu has been set up correctly or if there is anything I can do? Any help will be much appreciated! Neil B are you in the UK? Quote Link to comment Share on other sites More sharing options...
NeilB Posted October 3, 2018 Author Report Share Posted October 3, 2018 On 9/29/2018 at 9:43 PM, AbbeyMS said: Neil B are you in the UK? Yes I am. Quote Link to comment Share on other sites More sharing options...
AbbeyMS Posted October 8, 2018 Report Share Posted October 8, 2018 On 10/3/2018 at 11:49 PM, NeilB said: Yes I am. send me an email to [email protected] I can help you out with this Issue , presume you havent had the ECU fitted for very long? Thanks Quote Link to comment Share on other sites More sharing options...
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