LA9V VR6 0 Posted February 5, 2023 Hi, does any know if ecu 021 906 258 AG has an immobiliser? Changed loom today and it fired up, but then cut out. Fuel pump also sometimes primes and then other times primes and stops after about 2 seconds. thanks Quote Share this post Link to post Share on other sites
fla 9 Posted February 5, 2023 I think its just the CP suffix ecus with the built in immobiliser, not AG, although those symptoms you describe are very much immobiliser type issues Quote Share this post Link to post Share on other sites
LA9V VR6 0 Posted February 5, 2023 2 minutes ago, fla said: I think its just the CP suffix ecus with the built in immobiliser, not AG, although those symptoms you describe are very much immobiliser type issues So AG definitely does not have an immobiliser? Would the fuel pump prime at all though, if it was an immobiliser issue? I'm going to go through the loom again tomorrow as I think it may he a fuel pump wiring issue... Quote Share this post Link to post Share on other sites
Dox 22 Posted February 5, 2023 RPMs on tachometer yet? no crank position to ecu and the pump won’t run beyond priming Quote Share this post Link to post Share on other sites
LA9V VR6 0 Posted February 6, 2023 8 hours ago, Dox said: RPMs on tachometer yet? no crank position to ecu and the pump won’t run beyond priming Yes, rpms on clocks once it fires into life. Do you know what wire/ plug in fuse box I can check? Quote Share this post Link to post Share on other sites
Dox 22 Posted February 6, 2023 (edited) 3 hours ago, LA9V VR6 said: Yes, rpms on clocks once it fires into life. Do you know what wire/ plug in fuse box I can check? Im glad to see you've made some progress re RPMs. Personally I'd remove the pump relay and test it. I'd also see if the power getting to the fusebox and if its maintained on cranking engine started the engine and the key position returns to the usual run position (I'm sure the ecu provides the earth to the relay, so you need to check for earth too). Can't find much, but found this video on youtube 2 mins in Edited February 6, 2023 by Dox Quote Share this post Link to post Share on other sites
fla 9 Posted February 6, 2023 As Dox mentions, can you check the fuel pump relay ( numbered either 167 or 67) and the ecu relay (109)? Just apply a 12v source to them and ensure they close, and more importantly stay closed. If so then that will confirm their condition. Also check the connectors at the back of the fuse box - there is a plastic 'lock' bar that hold all connectors in place once seated. The connectors should all be in a line, and not protruding - if the latter, this connector is then loose. Just another thought - when it starts, what happens if you give it some gas to increase the revs? Does it still die or will it then continue running? Keep us posted on how you get on Quote Share this post Link to post Share on other sites
1xshaunx1 27 Posted February 6, 2023 Ignition barrel lock or ignition switch attached to the bottom of it, if that lots ok Quote Share this post Link to post Share on other sites
