Posted by peter r on September 13, 2007, 12:52 pm, in reply to "Re: Bad idea: Fit Chev HEI Dizzy to RR. Sorry - long post!"
144.139.163.94

Hi Hamish Thinking on it and yep i reckon module or its wires but guessing . The first fried because of the lack of heat sink and the reason it stopped after warming up . Maybe try refitting the first module and if it runs on all cylinders before it stops , it may be telling where the problem is ? The second running with a lack of cylinders says to me module also ...... the timing bit could be because it triggers the coil and it is failing internal but again guessing . I have ACA parts manual that with other componets has ignition modules which also has a sub cat which covers NZ only . As i say i know very little about these dissys ...... In the listing for CHEV it give 196 CID through 454 CID 1974 through 1989 ...inline 6 and V6 and V8 as all using the same module . Same for BUICK 173 CID through 455 CID inline 6 , V6 and V8 , same module . Same for Pontiac which is similar to Buick capacities , etc . Some Alfas , Fiats , Jaguars , Jeeps , Lancias ,Peugots , Renaults and 3500 Vitesse Rovers . The same module is used in all the above . It is rectangular with curls or angled ends , it has two mounting holes . On one end there are to male spade type , same size . On the other end there are two male spade type , one smaller than the other and the larger of the two is shorter than the two on the other end . Interestingly and a different module than above but .....for 3.5 ltr it give a listing for NZ RR 85 on as being different to AU RR 87 on as in different part number and the pics show them as different . The AU RR 85 and 86 are different to AU RR 87 but that`s because they don`t have the module on the dissy . The NZ 85 RR must have the module on the dissy because of the shape of the module . Cheers , Peter . --Previous Message-- : Hi Peter : : Yes, the mechanical side has been : checked. No play in the shaft... vacuum : advance checks out OK : : It has been run up on a machine without : power to check the mechanical side and : it is all OK. But when the battery is : connected it starts to change the : advance in a random sort of manner. : : I agree with your comments on the : module, but whatever it is it only : happens when live. : : I welcome any suggestions , no matter : how strange they may be. This thing now : owes me over $600, so I may as well : keep trying. : : And, yes it's sorta funny loking back : at the walk in the rain. I guess you : just have to learn to laugh at what the : Prince of Darkness does to you. : : Cheers : : Hamish : : --Previous Message-- : G`day Hamish : : I have to admit i had a smile on my : face when i read about your walk in the : rain , sorry . : : I know your not actually asking for any : suggestion and you may know or have : looked at what i do . : : I know little about them but as i : understand they are basically the same : as any other only all in one . : : Modules usually work or not but before : they die a symptom is often stopping : for no reason but restarting if not : straight away after a short period and : they do this for awhile and then just : die and won`t start no matter what , : they will also die without symptom . : : As i understand the module has nothing : to do with the advance/retard itself : but can make it stop and not start . : : The HEI still uses mechanical and : vacuum advance ( bob weights and : diaphram ) : : So i`d say for the timing to be : altering by itself , the shaft would : need to have play or more likely the : bob weights need to be : catching/sticking or their springs are : not right somehow or the diaphram rod : is getting caught/sticking or something : internal that moves with the advance . : : I`m sure you`ll work it out and i hope : your experts have looked at the above : and i`ve wasted time typing ? : : Cheers , Peter . : : : :