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#1
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why won't it fire???
Ok for those not in the know, my car has a BMW M60 3.0L V8 installed.
Tried to get it running today - and failed. After several hours going over the wiring with a multimeter I can surmise the following. the starter is cranking the engine the fuel injectors are working the spark plugs are firing the fuel pump is pumping there is fuel in the tank I am getting fuel vapour ejected from the exhaust ports, and the (very) occasional cough of life. WHY WON'T IT JUST START!!!! Have I missed something obvious?
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Check out my Build Blog www.samsv8locost.blogspot.com And here's all my build photo's on a picasa web album http://tinyurl.com/5tbtm46 |
#2
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Sam
you got air fuel and sparks..its gotta go............... unless the sparks are happening at the wrong time or in the wrong place. or the fuel is squirting at the wrong time. plug leads on wrong or timing out somehow i guess.. cheers les g nah dont think its fuel as the fuel would sit on the inlet valve and the engine would try to fire just like as if you had put a capful down the manifold really does sound like an ignition/timing problem Last edited by les g : 15th May 2010 at 09:54 PM. |
#3
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Tomorrow I'm gonna remove and clean all the plugs.
I'm also wondering if I have plumbed the fuel system right. - Am I right in my thinking that the fuel should be pumped into the fuel rail, with the fuel pressure regulator at the outlet end? Timing really isn't an issue, I should have mentioned before that it's fully ecu controlled with 8 individual coil packs mounted directly to the plugs. Thanks for your answer Les, don't mean to p1ss all over it, but I don't want you to think I ignored it either.
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Check out my Build Blog www.samsv8locost.blogspot.com And here's all my build photo's on a picasa web album http://tinyurl.com/5tbtm46 |
#4
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Hi, just because the ign is controlled by an ecu doesnt mean the timings actually right could be out of phase i s there a phase sensor on it? or is it a lost spark system?
yes it is normal to have a regulator on the exit/return side of the fuel rail. chuck some fuel in the intake if it fires its fuel if it doesnt its ignition as the meerkat says simples init Ray of course this assumes cam timing is correct and you have compression. |
#5
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Quote:
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I am not a complete idiot...........Some of the parts are missing !! Ronnie www.roadster-builders.co.uk |
#6
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Make sure all the earth's required are fitted,a lot of injection systems switch earth to turn things on and off.
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#7
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yep will do - heading up the garage just as soon as the F1 finishes.
__________________
Check out my Build Blog www.samsv8locost.blogspot.com And here's all my build photo's on a picasa web album http://tinyurl.com/5tbtm46 |
#8
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Quote:
not a wasted/lost spark system - what does a phase sensor look like and where should I look for it? I know I have a crank position sensor mouned next to a toothed wheel on the crankshaft - is that it?
__________________
Check out my Build Blog www.samsv8locost.blogspot.com And here's all my build photo's on a picasa web album http://tinyurl.com/5tbtm46 |
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