265 Hemi to efi

[heff0018]

Read the manual during lunch and yes surprising they modified the standard carb to deliver AFR 15:1 at idle and 18:1 at cruising speeds. The system consists of the computer bolted to the air cleaner (obviously a poor location choice), distributor, throttle position transducer, vacuum transducer, carb idle switch and coolant temperature switch.

[Charlescrown]

Yea I never really understood how it worked. They seem to be doing it all with vacuum and calling the box on the air filter a computer. I don't think there's a microprocessor in there. I had a brand new carbie for one and gave it away to an old mate who then moved into a nursing home so it probably got thrown in a cleanup.

[heff0018]

Ha yes I should have written 'computer' in quotation marks. The 'computer' basically adjusts the ignition advance in relation to both vacuum and throttle position.

Per the manual 'the computer consists of an electronic printed circuit board that is the programme schedule function and the ignition control function'.

The coolant temp sender just signals the ignition to bypass the programme on start up and revert to the fixed advance of 10 degrees. I spoke to an ELB specialist yesterday and he said most problems with the systems were caused by dud temp sensors that put the ignition in permanent bypass and therefore the ignition only ever received 10 degrees of advance. The quick fix is to disconnect the temp sensor and the power and economy is restored. There have probably been a lot of ELB systems removed for this very reason.

[Charlescrown]

The problem is it's not that easy because you need to change jets in the carbie to get things correct. 18:1 to me is out of the range of flammability or very close to it. I think that's why the extra timing because the mixture is burning so slow compared to a 15:1 mix.

[heff0018]

The problem is it's not that easy because you need to change jets in the carbie to get things correct. 18:1 to me is out of the range of flammability or very close to it. I think that's why the extra timing because the mixture is burning so slow compared to a 15:1 mix.

Yes that is correct, it is difficult to get the fuel to ignite at 18:1 and so the engine timing needed to be very accurate.

[heff0018]

It’s nearly been 3 years since I added to this post which is about when I just started stripping some paint off the rear quarter which then snowballed to full strip, bodywork and paint. Good thing is I did it all myself which probably saved me $30k, bad thing is how much time paint and panel takes and how much of a mess it makes of your shed.

But I have no spark at the moment and can’t work out what the problem is. I have replaced the ignition module twice, the dissy has been tested, there are no errors from the diagnostics, but there is no trigger signal to the CDI. When I run through the Camira ignition troubleshooting guide it says to replace the ignition module. I think there must be a broken wire or connection somewhere.

[Charlescrown]

Looking good. I remember from past posts you did have a lot of work to do. The ignition side is pretty simple so shouldn't take you too long to find out why no spark.

[heff0018]

Looking good. I remember from past posts you did have a lot of work to do. The ignition side is pretty simple so shouldn't take you too long to find out why no spark.

Cheers, yes it wasn’t a scuff and shoot, ha.

[vlad01]

Good to see the project coming along after so long. Seems to be a theme recently with forum members projects coming alive again after so long

[heff0018]

Good to see the project coming along after so long. Seems to be a theme recently with forum members projects coming alive again after so long

Thanks, I had completed a few smaller car projects in the time but nothing Delco related but I did pick up another Camira loom so keen to start something new. Now I need to get to the 1/4 mile and see what time this ute can run.