speedyxjs
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| posted on 19/9/09 at 04:42 PM |
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I promised a startup vid this weekend...
... but the bloody thing wont start  
We have spark, and fuel to the rail but not to the spark plugs (they are all bone dry).
Initialy we didnt have fuel to the rail as the hoses the wrong way round (doh) but after getting soaked in petrol turning them round  we got that
sorted.
I have followed the wires back to the ECU and they seem to be plugged into the right place. Im all out of ideas now so can anyone can think of what i
have missed?
ETA - The petrol tank is also leaking but i cant see if it is from where the hose or the banjo bolt. The hose clip is as tight as it goes so i suspect
it is the bolt. Will threadlock help?
[Edited on 19-9-09 by speedyxjs]
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Dusty
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| posted on 19/9/09 at 04:52 PM |
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ECUs switch things by earthing them. When I did my install without thinking I supplied the injectors with a nice earth expecting the ecu to supply the
power. Ditto coils. Doh!
Possible?
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speedyxjs
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| posted on 19/9/09 at 05:05 PM |
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Maybe, il have a look tomorrow
How long can i resist the temptation to drop a V8 in?
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speedyxjs
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| posted on 19/9/09 at 06:31 PM |
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Is there any way of checking to make sure there is power going to the injectors?
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mark chandler
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| posted on 19/9/09 at 06:41 PM |
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put a screw driver against one, when cranking you will hear them clicking away.
Have you the power resistor pack?
Also as above, the ECU switches earth so the other side of the injectors has a full battery.
Try squirting a bit of fuel into the TB when cranking, if the sparks are good it will fire, proving the injection side is the fault.
Regards Mark
[Edited on 19/9/09 by mark chandler]
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speedyxjs
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| posted on 19/9/09 at 06:44 PM |
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quote:
Originally posted by mark chandler
Have you the power resistor pack?
Yes i have but i havnt wired it in.
Where does it go?
How long can i resist the temptation to drop a V8 in?
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rusty nuts
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| posted on 19/9/09 at 06:44 PM |
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quote:
Originally posted by speedyxjs
Is there any way of checking to make sure there is power going to the injectors?
Noid light is one way of testing , tests for power and for switching/earth. Do not test using a test light as ECU damage may occur . If you can get
hold of one a "logic probe" is ideal .
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sminney
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| posted on 19/9/09 at 07:12 PM |
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have the injectors been used before? a friend had this issue where his engine had been built, dyno'd and then he put it in the car 6 months
later and some residual fuel had dried out sticking them shut. a gentle tap freed them up......
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mark chandler
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| posted on 19/9/09 at 08:30 PM |
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This why you need it wired in.
There is a wiring diagram in there somewhere as well.
Without it may run, my xjs did not like it when it was unplugged
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speedyxjs
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| posted on 20/9/09 at 08:10 AM |
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Ok, thanks Mark.
I will sort that out today 
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BenB
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| posted on 20/9/09 at 11:17 AM |
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As said already Emerald Dave in his book on EFi recommends easi-start down the trumpets as a test for fuelling problems. If that doesn't work
I'd check the whole spark situation- is it a good fat spark? Just because a spark happens at atmsopheric doesn't mean it'll spark
when under compression.
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rusty nuts
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| posted on 20/9/09 at 11:41 AM |
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Always found Easistart to be a bit harsh when starting an engine , in fact I think that the AA/RAC etc are no longer allowed to use it?. Brake cleaner
works as well without being so harsh on the engine
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