hdi 110 hard to start and cuts out sometimes

[modified406]

hi guys my hdi 110 x reg can be hard to start if drove for quite a bit if i stop it then go bk in and try to start it it doesnt start with cranking it but starts with a bump start also it cuts out once in a blue moon the intank fuel pump is working as u can hear it starting up for 10 seconds so i dont think its down to the intank fuel pump also it has a lumpy idle sometimes other times it could be fine any ideas what this could be

[modified406]

also wer is the double relay located in the ecu box as i have read on here that this could be at fault

[steve_earwig]

It's probably in the ECU box, although on later cars it's part of the ECU...

Sounds like a good starting point anyway.

[modified406]

sorry if i sound stupid here but is it actually in the ecu

[steve_earwig]

It should be in the same box. Take the lid off and have a squint.

[modified406]

ok spotted it its a browny coloured relay with a multi plug plugged into it any idea if i can get this from the dealer

[modified406]

also could that explain the strange buzzing noise am hearing when the cars started as i have heard this since i got the car

[steve_earwig]

Strange buzzing? Does it buzz all the time? Mine makes all sorts of noises from the climate but stops when the engine's running. Or maybe I just can't hear it over my injectors

Service Box says fifteen pounds and forty-three pence.

[modified406]

yes mate buzzes all the time lol sometimes it can be really loud other times its a low buzzing noise but it sounds as if its coming from that area
so that definetly the correct relay am looking at then

[steve_earwig]

#2 here, it's the only thing other than the ecu in the box.

[modified406]

your some man cheers mate going to try this 1st

[modified406]

well bought the relay today hasnt made any difference but i dont know if its solved the cutting out problem

any other ideas what could be causing the starting problem heres a list of what i have changed so far so you guys know
air flow meter
intank fuel pump
intercooler boost sensor
fuel rail sensor
fuel filter housing


the only other 2 sensors i havent changed is crankshaft sensor and cam sensor could any of these cause the starting problem it starts no problem in the morning but after a drive for about 6 miles it has to be bump started its really annoying me now i will need to get this fixed fur the start of october as the mot is due

[steve_earwig]

Could it be something to do with the heat? I'm thinking water temp sensor and fuel temp sensor (11 & 12), not sure if you should continue changing stuff though, any chance of some real diagnostics?

My other thought is freezing spray. Get the engine hot, stop it, spray suspect components and try starting it.

[modified406]

do you know something ive never even though about heat it only seems to do it when its warm i dont mind replacing them mate i have nothing else to spend cash on lol i'll have a look at they 2 sensors

[mickeydread1122]

fixing your car by quesswork can be very expensive indeed and cost you , your money and valuable time.my suggestion is to look for someone with dealer level diagnostics tools and check for any possible errors stored on the ecu or have live data checked on the car.this will eliminate and streamline the possiple cause of the problems as this will frustrate you more and more by fixing your car on the fly.