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no spark - help needed! 

 

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 Post subject: no spark - help needed!
Posted: Mon Mar 21, 2011 2:35 pm 
Getting Side Ways
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Joined: 28th Oct 2008

Location: melburn
VIC, Australia

so i swapped engines and couldnt get fuel or spark.
fuel is now fixed, spark isnt.

so far i have replaced/swapped:
dizzy/TFI
ECUs
injector loom
coils
smartlock modules

now at the moment i am only testing spark at the coil.
when i use a test light on both wires connected to the coil with the ignition 'on', both wires are recieving a positive signal - is this correct?

is there any other wires i can test to find out what could be causing the issue?

i cant think of anything else that could be wrong.
i have checked for any melted wires and i didnt change anything during the engine swap!

if all else fails, can someone please explain how i can lock the timing at the dizzy so the ECU has nothing to do with timing?
that may be a way around it for now as i need to move the car soon to clean all the oil and s**t under it.

if anyone can think of anything that will help - no matter how strange, please please tell me.
this is doing my f**k head in lol.

 

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XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 3:31 pm 
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Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

did you replace the tfi with a new one or a secondhand one.??
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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 3:46 pm 
Fordmods Junkie
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...did you let your smartlock relearn?

 

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EL XR6 motor, EL ECU + J3 chip, WADE 1673 Camshaft, 3" S/S intake, Pacy 4480, 2.5" Hi flow cat, 2.5" Lukey exhaust.
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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 3:52 pm 
Getting Side Ways
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Location: melburn
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i have 4 known working TFIs, the dizzy that i pulled out is less than 4 months old.
but no, not a new one.
i cant afford to buy a new component for every unit at a guess its the reason.

and yes, the smartlock module did relearn.

the engine cranks, the injectors are firing, but no spark.

the thing im most curious about is my findings at the coil.
is it normal for both wires being fed to the coil to be positive?

 

_________________

XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 4:02 pm 
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Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

to me thats a faulty tfi or coil.. its the tfi that ignites the coil.. the coil should only have 12v from ignition side.

the dizzy sends the pip signal to the ecu, the ecu sends the spout signal to the tfi then the tfi ignites the coil..
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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 4:17 pm 
Getting Side Ways
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Location: melburn
VIC, Australia

that was my thought also, but as said, both dizzy and coil were new in october.

anyway, i got one from the wrecker on an exchange basis so i can swap for another.

is there a way i can test the TFI or coil outside the car?

also, would locking the dizzy by removing the connection between ECU and TFI be of any use?

 

_________________

XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 4:19 pm 
Getting Side Ways
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Joined: 28th Oct 2008

Location: melburn
VIC, Australia

i guess it could be the coils, i noticed that i only receive a positive signal on the negative side of the coil when its plugged in.
so ill try swapping through all 6 that i have here lol

edit - tested all the coils and they all have 1.1 resistance across negative and positive terminals.
the manual says they should be .41-.45

 

_________________

XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 5:21 pm 
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Ride: ford falcon au3 xr8

Location: a shit suburb in sydney
NSW, Australia

what about the dizzy and coil from your old engine??

you wouldnt think that all the spares could be faulty :?
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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 6:04 pm 
Getting Side Ways
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Joined: 28th Oct 2008

Location: melburn
VIC, Australia

ive tested them also.

the hall sensor is working as i can see voltage change on the output of the TFI, so i assume the TFI is working.
but as soon as i plug in the coil i get a positive signal at the coil and at the TFI :/

 

_________________

XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

Top
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 Post subject: Re: no spark - help needed!
Posted: Mon Mar 21, 2011 6:45 pm 
Getting Side Ways
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Posts: 807

Joined: 28th Oct 2008

Location: melburn
VIC, Australia

f**k me!
the earth on the TFI loom was giving 5volts positive lol
took 2 days and alot of f**k around to find, but got it!
hopefully that fixes the injector issue also.

 

_________________

XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

Top
 Profile  
 
 
 Post subject: Re: no spark - help needed!
Posted: Thu Mar 24, 2011 6:47 pm 
Getting Side Ways
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User avatar

Posts: 807

Joined: 28th Oct 2008

Location: melburn
VIC, Australia

how and why i dont know, but i removed my interceptor ECU and issue went away lol
never had a problem in the past, but i think one the wire may have lost contact inside the heatshrink wrap, who knows! its working now so its all good.
thanks for the help anyway guys

 

_________________

XG Panelvan
mild engine, EL ECU & J3, HI6 & MSD coil

in the shed - .595" lift cam, GT4202, forged AU engine, ems 4424 ecu, glide & 5500 stall - next-bellhousing

XH ute daily - DOHC BA XR6 engine, T5, AU3 ECU, J3 chip, wideband & logger, ported BBM, 3" intake

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