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Engine 1990 cadillac 4.5
Ecm 1990 7747
No egr
No smog stuff
No ac

Thank u for clearing that up.I'm gonna post a current bin and logs etc.maybe someone can have a look and tell me if I have the correct info to aquire correct data and if anything odd stands out.I've...

Ok so my engine and distributor are a factory set up.ccw is the direction it was designed to run.so being that all the hard parts are the same and wired the same (only diff from a corvette dizzy is...

This is a screen shot so sorry for the small print.I realize this is microsquirt related.just figure the hard parts work the same.same parts numbers.just opposite rotation. 13051

Thanks for more input.so reversing the distributor rotation would not change the signal from the icm to ecm. That leaves me a little confused.from what I had read about the variable reluctor and how...

Thank you.that helps a lot.I don't know if my timing is iratic at higher rpm as about 4300rpm is as high as I've had it.from the first time I got this to fire it's felt like I'm not getting the...

Delco wizard you sound familiar with this.the top of my cadillac distributor is identical to corvette large cap.same part numbers for pickup coil and icm.its wired the Same.only it spins ccw.I'm...

Found some cam specs for 4.9 which I believe is identical to 4.5.1304613047 can anyone tell me how different this is compared to a stock 305 tbi

From some bins I looked at from f body and y body tpi cars with large cap hei none are initial sa zero.they have 6° advance for most.one f body had 10°.so I'm thinking a reason for this.I don't have...

Thanks.I neglected to mention.I did try to reverse the wires this morning but it would hardly run so i put it back the way it was.same as is wired in a pic of a new distibutor.I had the dizzy at...

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Well today I played with my distributor. I tried setting the distributor to 0°TDC and changed it in my bin aswell.felt same.I also swapped back to smaller injectors and did a few logs to get the fuel...

Can someone point me in the right direction.my engine call for 10° initial advance.at what degree of Crank rotation should the reluctor line up with the tabs on the pick up coil.should it be at...

1302813029 the pic is wired same as factory.second pic is wired opposite

After much searching and reading I've found a fair bit of info on this.looking at new large cap hei distributors I see which color wire goes to which pin on the 7 pin icm.my understanding of the...