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- - Knock sensor (https://67-72chevytrucks.com/vboard/showthread.php?t=702540)

Hiluxxulih

03-29-2016 09:26 PM

Knock sensor

Why does my 1985 truck have knock sensor ? At least I think that's what it is near the starter .

CSHADES

03-30-2016 09:31 AM

Re: Knock sensor

If it doesn't have it now I would assume that originally it had ESC on it. Most guys have replaced the esc dist with a regular hei.

Hiluxxulih

03-30-2016 09:38 AM

Re: Knock sensor

It still has the original esc distributor , I guess I always thought knock sensors were for efi engines .

CSHADES

03-30-2016 11:55 AM

Re: Knock sensor

The only real input the ESC system has is a knock sensor. It advances the timing up as far as the controller lets it and then uses the knock sensor to pick up pinging then adjusts it back down. It is amusing how big the controller and harness is for what little it really does.

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