Skip the auto shop - Our mechanics make house calls

Q: 86 GMC 305 quits firing occasionally

asked by on

I have an '86 GMC 305. It quits firing from time to time. I replaced the coil, control module, rotor and pick-up coil. Do you have any thoughts what could cause this?

A: This car is very old. Personally, I'd j...

This car is very old. Personally, I'd just go and get a rebuilt distributor. Most companies sell the rebuilt distributors with the lifetime warranty. They don't cost that much. Replace your entire distributor assembly.

If that doesn't fix it, then you're going to have to trace the wiring all through and see where the wiring short is. You changed that control module and the coil, but I would change the entire distributor assembly. There's so many tiny wires there that can short out and they are so cheap. Just change the entire distributor assembly with a rebuilt unit to have this issue taken care of.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Will turn over but won't spark to start, 1987 Chevrolet Cavalier

Hey there, thanks for writing in about your 1987 Chevrolet Cavalier. As you may already know, your car needs air, fuel, and spark to start. You have covered most of that already. If it is not getting spark, start by...

Q: noise when starts cold

Hello. This noise typically comes from the valve train. It is due to the design of the variable valve timing system. It is normal to make some noise, but it becomes worse if the wrong oil weight is used or...

Q: I have a 1993 Toyota Camry sedan 4cyl. It stalled on me as I was driving down the road. I tried to start it and it will only run f

The vehicle may have spark and fuel but its not getting any injector pulse most likely. Try disconnect one of your injectors while hooking up a test light across the connector. Then have someone crank over the engine, you should...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...