XE running problems!!! please please help! i'll pay for your help lol!
hello, I've recently been having problems with my 1.8 ecotec engine. for some reason it keeps misfiring with load bangs at the moment.
it all started when i noticed that when i turned the key in the ignition to phase one the fuel pump would wherr away for a second as its suppose to but now for some reason the fuel relay keeps clicking on and off randomly at exactly the same time as the fuel pump down the back on the car. to try and cure this problem i changed the fuel relay and checked out the earth for the relay on the inlet manifold. that did nothing at all! took the earth off and turned the key and the relay just gave out a fast buzzing sound which is what its suppose to do. i even tried relocating the earth but it still does the same thing. on phase one when the key is in ignition, if you go into the engine bay you can hear the fuel being pumped in intermittently as well and the idle valve control humming continuously. the engine runs but its sometimes hard to start and keeps backfiring. i'm now just wondering whether it is a power problem on the relay from the battery or something else??
any help would be appreciated! please help me its racking me brains!
Don't wanna cause any harm mate, but this sounds very similar to a problem i had, although my car wouldn't start. Same symptoms from the fuel relay.
Eventually traced it back to a dodgy ecu. I think it is the ECU that controls the fuel relay and the pump, i could be wrong as my knowledge is very limited when it comes to electronics but it might give you some other avenues to investigate.
Oh and it didn't flash up any fault codes either on the dash.
thanks for the reply mate. i will definitely check out the ECU it could well need reprogramming. is that just a case of swapping it or sending the ecu down to the local garage or would the whole car have to be taken down there?
i have got a friend coming round tommorro to check it out for me so i will let you guys know what is happening!
i don't have the ECU light coming on either! i have disconnected to ECU and stuck it back in a few times but nothing.