Replaced intake gasket, new coil, crank sensor, fresh tune up complete. runs good but keeps frying modules. All grounds ok.
Code 1351 when it happens. HELP

95 blazer w/ cpi & side tower cap

 

I guess everyone is stumped also, could a disconnected Knock sensor do it maybe? Im guessing something is spiking the voltage to the module & frying it.
These things are not cheap & I want to solve this...

 

is the knock sensor disconnected? if it is I would connect it-jp[sm=happybounce.gif]

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btw-without a manual in front of me-what is a 1351? JP

 

btw-without a manual in front of me-what is a 1351? JP[sm=badbadbad.gif]

 

DTC P1351 Ignition Coil Control Circuit High Voltage

The left Knock sensor wiring got damaged & only the right one is connected, this should not fry the module looking at the wiring diagram.
Seems that after the car runs a while is when it happens, just cuts off while driving

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By the way I havent found a GOOD flow chart for this code

 

By the way I havent found a GOOD flow chart for this code

 

ignition module failures result most commonly from a fault in the secondary wiring. (i.e. bad wires plugs rotor/cap

 

adding to my last post - bad components in the secondary ignition will cause high resistance and icm failure

check the ground for the icm w/voltmeter - if you have a drop in voltage more than 0.2 volts you have a improper ground

also, a cause could be charging system ac current - in system if you put a voltmeter to your battery (on ac not dc setting) and get more than 0.5 volts ac then you need to have your alternator checked

good luck