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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15181
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have an 88 Chevy Silverado that will not spark when

Customer Question

I have an 88 Chevy Silverado that will not spark when cranked. Maybe a rat chewed a wire or something. we replaced the pulse generator, the coil, and the ignition control module ...
JA: How many miles are on the car? What size is the engine?
Customer: 117000, 350
JA: What is the model/year of your Chevy?
Customer: 1988 Silverado 2500
JA: When was your last tune up?
Customer: never
JA: Are you hoping to fix this yourself?
Customer: yes
JA: What have you tried so far?
Customer: like I said, coil, icm, pulse generator and plugs
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Chevy Mechanic about your situation and then connect you two.
Submitted: 10 months ago.
Category: Chevy
Expert:  CHRIS ZAPANTIS replied 10 months ago.
Hello Im Chris and I can assist you
Expert:  CHRIS ZAPANTIS replied 10 months ago.
Your chevy have a carb or a throttle body?
Customer: replied 10 months ago.
Throttle Body
Expert:  CHRIS ZAPANTIS replied 10 months ago.
is the injector spraying (dont worry im not worrying about fuel)
Expert:  CHRIS ZAPANTIS replied 10 months ago.
also let me know if you have a test light and dvom
Customer: replied 10 months ago.
Good Question man, I am on a project in KY, and my son is working on the truck. He just text me that he does not think so. I asked him the same question to see if the truck is even trying to start. Sounds like it is not trying to start
Expert:  CHRIS ZAPANTIS replied 10 months ago.
I have to know this and then go from there. We have to test everything. Did he happen to look to make sure the distributor is spinning?
Expert:  CHRIS ZAPANTIS replied 10 months ago.
how about the pickup coil they fail especially when they are so old.
Customer: replied 10 months ago.
they took it out and replaced the pulse generator. I am sure that they did not check for rotation ... Good check, but I did not ask him to check that.
Customer: replied 10 months ago.
No is the answer
Customer: replied 10 months ago.
That would be a major engine problem ... no knocking or piston - valve contact heard when cranking
Expert:  CHRIS ZAPANTIS replied 10 months ago.
What would be a major problem?
Expert:  CHRIS ZAPANTIS replied 10 months ago.
the gears and shaft on these distributors go bad all the time. At least when I used to see them, lol
Customer: replied 10 months ago.
Sorry man, the rotor not spinning is a major problem. The pickup coil? What I call a pulse generator has been replaced under the rotor. The gears on the rotor drive shaft looked fine. Is my understanding of the pickup coil correct? Also, the actual spark coil has been replaced.
Expert:  CHRIS ZAPANTIS replied 10 months ago.
do you have power at the pink wire of the coil?
Expert:  CHRIS ZAPANTIS replied 10 months ago.
that is not pickup the actual spark coil
Customer: replied 10 months ago.
That is where we left off ... I asked them to check that and they have left the garage ... How can we pick this up later?
Expert:  CHRIS ZAPANTIS replied 10 months ago.
sure ill catcha later
Customer: replied 10 months ago.
I would prefer to go ahead and pay to call you when I am in the workshop ...
Customer: replied 10 months ago.
how do I get a hold of you?
Expert:  CHRIS ZAPANTIS replied 10 months ago.
ok as you wish
Expert:  CHRIS ZAPANTIS replied 10 months ago.
you have to go through this service.
Customer: replied 10 months ago.
Login ... ? and we pick back up?
Expert:  CHRIS ZAPANTIS replied 10 months ago.
sure
Customer: replied 10 months ago.
10-4
Expert:  CHRIS ZAPANTIS replied 10 months ago.
cool
Expert:  CHRIS ZAPANTIS replied 10 months ago.
what was the outcome?