Nsomnia

I bought an HEI dist. off ebay and installed it in my 87. 2.8->5.7 swap.

Got er installed and there is 12v to the coil, and 12v on the yellow and red wire going into the cap. There is a black wire going to the cap that is unconnected in the coil just a spade type connector.

While there is power going to the coil, no spark will jump to the plug terminals. Does anyone have any ideas? Im about ready to pick 2 or 3 up from the junkyard just to see if they work.

AlkyIROC

Black wire is a ground. It's usually bolted to one of the coil mount bolts.

Is there a rotor under the cap? Is the rotor spinning around when the engine cranks over? Is the module plug from the distributor plugged into the cap? Is there a module inside the distributor?

Reading material
https://www.thirdgen.org/hei
http://forums.superchevy.com/70/6261...tup/index.html

Nsomnia

Ill try grounding it somewhere Thanks. I did see some sparks jump to the termials at one point but could never replicate it.

The roter spins and everythings plugged in.

Nsomnia

Well I pulled a dist from the jy, ill put it in and report back.

AlkyIROC

It could be a bad coil or module

Nsomnia

Possibly. JY dist sparked fine. Getting the engine to run, thats another problem

Damon

Large cap HEI with the coil on top??

If so, there are 3 wires going between the coil and the 3-wire harness that feeds down into the distributor to the module....

The + side that is on the same double-pronged spade connector in the cap as the 12V+ power feed to the coil from the vehicle's wiring harness.

The - side that is on the same double-pronged spade connector in the cap as the TACH wire to the vehicle's wiring harness (if your car does not have a tach there will be no wire from the vehicle's wiring harness connecting to the TACH terminal on the distributor, although there will still be a wire leading down to the module inside the distributor).

Last is the ground wire or ground strap which connects between the coil's metal "square" amature to a single-pronged spade connector in the cap. Again, there is a wire from that spade connector down into the distributor's module, but there is no connection from this to the vehicle's wiring harness.

Justin 87 GTA

iTrader: (3)

i am converting a tpi to carb and i have a new hei large top distributor// which old tpi wire goes to the tach terminal on the new distributor? what color, where is it? thanks