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Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Chevy
Satisfied Customers: 15643
Experience:  Have owned a repair shop for 25 yrs.
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Chevrolet Silverado 1500: I have no start no spark to ICM no

Customer Question

I have no start no spark to ICM no pulse to coil,read on line how to check cranksensor getting 12 volts to plug pieces plus wire getting 9.6 v all time cranking it by hand
Submitted: 1 year ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 1 year ago.
oktell me,what all have you replaced?how and when did this problem first begin?
Expert:  Tim's Auto Repair replied 1 year ago.
does the distributer rotor turn when you turn the engine?
Expert:  Tim's Auto Repair replied 1 year ago.
be sure of the engine size.it cant be a 4.6..
Customer: replied 1 year ago.
coil, checked ICM was good, cranksensor was scand code bad,dist turns,new cap rotor, yes it 4.3 sorry, no fire to icm, coil,distributor, coil,ICM,cranksensor all getting 12 volts, no start
Expert:  Tim's Auto Repair replied 1 year ago.
how did you check the icm?how and when did it first loose spark?
Expert:  Tim's Auto Repair replied 1 year ago.
how did you check the icm?how and when did it first loose spark?
Customer: replied 1 year ago.
it was running good, went to crank it 1day hasn't started since
Expert:  Tim's Auto Repair replied 1 year ago.
how did you test the icm?
Customer: replied 1 year ago.
took the ICM to a same yr. Same eng. it cranked up
Expert:  Tim's Auto Repair replied 1 year ago.
i see..so,,you do see that you have no spark at all on the plugs?
Customer: replied 1 year ago.
Yes
Customer: replied 1 year ago.
I am not getting a pulse signal at the coil or ICM. they are getting 12 volts at each plug.
Expert:  Tim's Auto Repair replied 1 year ago.
ok,tap on that icm with the handle of a screw driver or something and see if it will start..i think your problem is the icm,,it should have a spark if the distributer is turning ,thereis battery voltage to the + side of the coil,and the icmis gpood
Expert:  Tim's Auto Repair replied 1 year ago.
do you have a spark from the coil,,on the coil wire?
Customer: replied 1 year ago.
No
Expert:  Tim's Auto Repair replied 1 year ago.
did you try another icm?
Customer: replied 1 year ago.
Are you still there
Expert:  Tim's Auto Repair replied 1 year ago.
yes...the sie is trying a new program,,i will be slower than normal,,sorry
Customer: replied 1 year ago.
K
Expert:  Tim's Auto Repair replied 1 year ago.
let me know what happens
Customer: replied 1 year ago.
What do you mean ?
Customer: replied 1 year ago.
Hay been on for over one hour no answers
Customer: replied 1 year ago.
Do not process the charge I am getting of line !! Waited for 1&1/2 hours no answer
Expert:  Tim's Auto Repair replied 1 year ago.
hiare you there..the site is having some problems,,and,i have been off line..tell me where you are on this onethanks