wire that goes into the block above the starter

[adamforsythe]

Hello,
What is the deal with that wire that goes into the block above the starter?
What is it and what does it do?
Thanks
Adam

 

[ryoken]

knock sensor?

 

[dyeager535]

I concur, knock sensor more than likely. (if factory)

Does/did the truck have ESC or CCC?

 

[adamforsythe]

Hello,
What is a ESC or CCC? This is a 1985 K5 Blazer with a new 5.7L create engine. It is carbed.
Thanks
Adam

I concur, knock sensor more than likely. (if factory)

Does/did the truck have ESC or CCC?

 

[sweetk30]

e= electronic

s= spark

c= control

and if you have a 2 wire blue plug on top of your carb then you have the electronic cab for fuel control .

 

[R72K5]

also known as ESt and an 85 would have this


it is electronic spark timing

ESC is 99% the same deal

 

[dyeager535]

And I may at least a partial mistake in my previous post. CCC on trucks (Computer Command Control) from what we've seen here so far, did not use a knock sensor.

The original factory truck engine I'd guarantee was a 305/5L IF it has ESC. ESC was used due to the relatively high compression of the 305 with the crappy cylinder heads of the time. Saved the engine in case there were problems, the ESC (via the signal from the knock sensor) would retard timing.

The distributor is different than "standard" HEI, and there will be a small computer box behind and above your glovebox.