I've been having great problems with my car as of recently!I recently replaced the engine as my old one blew the head gasket and wouldn't fire up at all once replaced! so decided to completely replace the engine with a new one. anyways the new engine is exactly the same as the old one X18XE ecotec from a Vectra. the other day everything was finished with the engine all totally connected. however i tried firing up the engine and it is misfiring and stalling if you don't give it any gas. once you give it some gas it seems to run happier until you let go of gas again and it completely cuts out. last night i noticed that the fuel pump which humms keeps humming intermittently and not continously for the first few minutes. at the same time as the fuel pump humming intermittently the fuel relay keeps clicking on and off on and off! which kind of leads me to suggest its a relay problem??? has anyone had any problems like this before as it is really starting to annoy me now! not having the car for 4 / 5 months now! does it sound like something simple as to replace the relay or is it some other problem. engine runs but misfires, fuel relay clicking on and off, and fuel pump turning on and off! any advice would be very much appreciated!
ok i have replaced the fuel pump relay today and same problem! i now beleive you guys were right and that it is the earth cable on the inlet manifold. i'm not sure if the earth cable needs relocating to somewhere else if possible or whether i should just try cleaning the connection on it? what would you recommend? could this tiny little bad earth connection be causing the engine to misfire?
where are all the big chunky earth cables in the engine bay? i.e i have a XE engine in the nova engine bay. so far i have found the battery one and the gearbox one is pretty chunky, however the gearbox earth cable is snapped. could this cause the misfires and the relay pump to keep clicking? the earth on the inlet manifold seems a bit dodgy as well. not entirely sure where abouts it goes on the inlet manifold!
ok i have just had a tinker with the nova. took some bits off the engine to get to the fuel relay earth and the idle vavle area. i took the fuel relay earth off and turned the key to the stage where the fuel pump turns on and the relay just started buzzing like crazy which would be expected. i then decided to re position the earth for fuel pump and then do the same. the fuel pump wherred but then the relay started clicking on and off again! so i am lkind of stuck what to do next now! any suggestions?