Thread: 1998 D1 V8 Erratic idle fixed. Hoo bloodyray

Thanks again

So Scott , I am a bit slow on the uptake but you completely changed the Dizzy and coil and ignition module? It was a complete Scorcher system?

Could I have exact model numbers etc please.

Beeutey. We did change over the old coil and ignition module with brand new ( but the same spec ) modules. The auto elect tried the Bosch one but couldn't get a spark.

It does run fine , but maybe a bit rich? ( even when hot ) on petrol.

You would think then that it was the gas system but reading on here highlights the fact that a lot of 3.9 V8's on gas have ignition issues.

Pete

Originally Posted by land864

Could I have exact model numbers etc please.

Try contacting Performance Ignitions, they sell them and are best placed to advise on suitability.

Originally Posted by land864

Beeutey. We did change over the old coil and ignition module with brand new ( but the same spec ) modules. The auto elect tried the Bosch one but couldn't get a spark.

Your auto electrician wasn't trying very hard. It's only four wires, and it's all in the Bosch conversion thread. Did he try a real Bosch module or a fake Chinese one?

Originally Posted by land864

It does run fine , but maybe a bit rich? ( even when hot ) on petrol.

The MAF has an idle mixture adjustment screw, find it and adjust it to the workshop manual specs.

Originally Posted by land864

You would think then that it was the gas system but reading on here highlights the fact that a lot of 3.9 V8's on gas have ignition issues.

No Kidding. That's why nearly all gas converted LRs coming through my workshop end up with Bosch module conversions.

You know what.

I am just going to take the car to performance ignitions and get them to do a complete new system. Cost is around $ 800 . Pity I just wasted $ 450 getting my auto elect to do the other stuff.

That may or may not fix it but at least it 100% takes ignition problems out of the equation.