Re: I Think I Killed my 84 SFI, No Spark.
 

Not that you're pissing me off. Its that you have a part that isn't working, and when you put a square peg in a round hole, you can keep turning it as much as you want and it still won't fit.

My Plan B suggestion would be to buy a 86/87 sensor setup. That appear to be what you have on the motor originally to begin with. That is what is in Ken's picture. All indications are that it would slide right in and save you hours of heartache. Not to mention it is cheaper. :lite:

I'm shocked that none of the 84/85 owners have chimed in here... :ugh:

Re: I Think I Killed my 84 SFI, No Spark.
 

(have showered and feel Human again)
sorry for the frustration I may have shown...
it's just that I can handle the stuff I can see,hell changing the Crank out was a Dream. the Bearings and reassemly including new Manifolds and Exhaust went together like cake. this thing really looked good and ready to go.
it's what I can not see that Baffels me.I have never understood Electricity and it's affects.I just can't Grasp what I can not see.
any how. I have read over some of what I posted and see (lol) a few errors.
before I tore out the sensor (to see if it sat at the same depth as the old mount did as well as to get photo's), I was getting Voltage readings, probing the Cam sensor out of the car, that read 0.77 Volts and when I rotate the cam it rises to 0.80 Volts at the window.
I take it that this Voltage is incorrect and should be completely different.
all my Fuses under the Dash have been tested and returned. all Fussable links were tested. while having the Harness appart. I resoldered and checked all connections. so whys my meter not finding the Voltage at 7 Volts seems to be the question. I think...
and just simple question of the 3CI module. does it require the base to have a good ground? becouse many tests I did while it was not bolted up. and being mounted on studs, how important it it for base to be grounded.
Thanks

Re: I Think I Killed my 84 SFI, No Spark.
 

The module grounds thru the harness (although it is a good idea to also ground the base of the module as good practice ... cuts down on odd artifacts at higher boost/RPM).

Basically ... it sure looks like the wrong sensor, which is more than likely your problem. Get an 86/87 sensor (which will look like what came out of the car originally), install it and I'd give you even odds that your problems are solved.

If not, at least you're one step further down the troubleshooting chain and you can return or resell the 86/87 sensor. Keep it simple ... like Scott so eloquently pointed out if you don't have the right parts, you will never get the square peg in the round hole.

Re: I Think I Killed my 84 SFI, No Spark.
 

I am looking for engine harness wiring Diagram for 1984.
I believe the harness has crossed wires.
I believe some errors were created to my Harnessby possibly using an 86 set of prints. I seem to only be able to find 86 prints
not having any luck with Haynes repair Manual nor Chilton's

:tank:

Re: I Think I Killed my 84 SFI, No Spark.
 

'86 diagrams won't cut it. Nor will Haynes or Chiltons. You need a real '84 GM manual that has solid factory info.

Hopefully someone with one can chime in and help you out. Such manuals pop up on eBay from time to time. Never hurts to put a "wanted" at in our For Sale / Wanted area...