Hello guys I was referred to you all from the turbk buick v6 websites. I've got a problem on my regal, with the timing advancing itself. this an '83 ttype hei distributor with no mechanical or vacuum advance just and hei module with 3 extra connections beside the positive and negative mag pickup, marked E R and G or B not sure at this exact moment. I'll set the timing to 10 degrees and with any increase in rpms the timing will automatically and instantly advance itself an additional 12-15 degrees. yesterday I jumped 2 wires on the old ecm connector B and C or E and r on the hei module and it advances the timing even further but as the rpms are raised the timing retards itself, this is pretty much what I want but the car will not start with those 2 wires jumped and I have the move the ditributor alot to get the timing at a good place to start so it can be where it should under it's full retard. so I'd have to unjump the wires advance the distributor alot to get the car to start then rejump the wires then turn the ditributor back. I'd like to get the timing to not move at all just stay stationary at all rpms or have a that small retard but without all the hassle of jumping wires and turning the distributor to getthe car to start. all this becuase someone told me those computer hei modules have 7 degrees built in. do older hei's "with only the mag pickup connections"have any advance built in? this distributor runs my blowthru turbo v6. I want to keep the ignition stock because it has been trouble free except for this new problem and reliable.
i thought the timing curve went thru the est module on the fender well.i do seem to remember the carb'ed turbo cars have a vac advance.
all the stuff that was on the fender well is long gone now. and none of the carbed turbo's had vac or mech advance, they were controlled by the ecm, and the older '78-'79 had their timing controlled by the box underthe hood called the "Turbo control center" what I do know is that the distributor is still advancing the timing with no computer hooked up. If I could just get the timing to stay stationary that would be great.
I would get an older HEI with vac and mech advance. The older 4-pin HEI modules don't advance the timing. You might not have any knock retard features though.
Thanks scott, that what I needed to know, I'll just skrew in an older module. I have a Jacobs electronics opto timer boost master to retard the timing. eventually I'll get a real hei mech and vac advance dist. for now I just wanted to get this small problem solved and keep moving forward with my '66 Riv.
I removed the hei module from my '75 buick 350 it's a 4 pin module, I put it in my v6 distributor it don't fit exactly right but I used one bolt and fastened it in there and had to cut 2 terminals down so the stock pickup leads would slide on. and it works but even tho this is a '75 module it still very slowly retards the timing as the rpms are brought up, but this is great for my application but, I still never knew that the modules did that.
