clevokid

Have finally got around to getting my 378 going again. Engine will now fire but not actually start? Doesnt run on or anything just fires then dies. Has got good spark (electronic ign) and plenty of fuel at the accelerator pump (borrowed 600 on it as my 750 seems to have a prob).Anyone got any suggestions? Is it possible for fuel pump to have enough to prime the carby but not enough to keep it running, gave pump 4 good pushes and delivered a good shot each time.

ch7472

I take it it has been run in? If not you my have to try raising the idle speed to get it up to temp so as it will run. I dont think it would be your fuel pump. Is it an electric or mechanical, is the timing right it could be a combo of things start with the basics and work from there.

clevokid

Engine had done about 7000k`s before it was taken out. Nothing has been altered on it ie timing rockers etc Thats why I`m unsure where to start looking at now.Fuel pump is original mechanical type

brenx

Try changing the plugs. You'd be surprised what that alone can do.

Brenden

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XB Fairmont (street car) 11.07@123.02mph.

Work Horse

Has it run before in this car, are you sure you have it wired properly?

TruBlu351

Try advancing the timing and winding the fast idle screw up a bit.

Are all your leads in the correct order? Double and tripple check them

Fuel pump issue would be very unlikely.

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XE Falcon
393 Tremec TKO 9"

clevokid

It hasnt run in this car before, it is now in an 86 XF. Plug wires etc are all as they were before engine was removed. It sounds fine when it fires so dont think it is a timing/fuel issue. Tried running 12 volts from the battery direct to the coil but still is the same. If you hold the key in the start position it will run fine ( thou dont think the starter would appreciate too much of this). Thinking it must be something in the cars wiring somewhere. Had a mate check the power to coil etc on sunday when I finally finished the wiring so might have to get a bit more of a look into the loom I think. Car was fine with the 6 still in it so not sure what else. Might try changing the plugs but I would think if they were bad it wouldnt fire at all?

TruBlu351

Did somebody mention a few months back that the ignition wiring on a 6 pack needed changing some way when fitting a V8? Was it the wiring to the distributor?

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XE Falcon
393 Tremec TKO 9"

clevokid

It uses the original wiring to the coil, then feeds to the ignition module direct from the coil, then to the distributor. Thats why I tried the direct feed to the coil from the battery to see if it might have been something there

50LtCapri

Sounds like a shot balast resistor or the wire from the ignition to the balast resistor to the coil.

If its firing when you turn the ignition key to start then stoping usually with a backfire when you turn the key bakc to the on position then 99% of the time it's one of these two items.

Also if you have a 12volt coil (ie does not need a balast resistor) then make sure you bypass or remove the balast resistor as it will not run.

Cheers
Ross

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New CAR July 2004 build BA XR8 Ute.
"It ain't got much show but it's got plenty of go"
Passenger quote after a ride in the XY 351 ute.
"Your going to put WHAT in there"
Engineers comment about the 5.0 Lt EFI transplant to the Capri.