71 c10 w/350 quit running on the freeway and won't start

Asked by Nov 01, 2015 at 08:33 AM about the 1971 Chevrolet C/K 10

Question type: Maintenance & Repair

I was driving on the freeway truck running fine but it just died and would not
start back up. Cranks ok but that's it. Worked the throttle by hand and could see
gas squirt from the primarys.

4 Answers

49,425

Coil, coil wire, distributor rotor, electrical, broken timing chain are all possible causes. You need to determine if you have spark and if not, determine why.

2 of 2 people found this helpful.

I would think a broken timing chain would make some noise when it happened. Truck acted like I just shut it off. I had new plugs, points, condenser, rotor, distributor cap, plug wires, alternator, voltage regulator all done about 8 months ago. rebuilt carb 1 month ago. I'll check for spark as you recommended.

49,425

Not saying it was the timing chain, but listing the possibilities. If you find you have spark and fuel the next step is a compression test. You seem to have fuel as verified by seeing fuel squirting into the carburetor. Keep us posted as to what you find. Heck it could even be an issue with the ignition switch.

960

Yeah, actually on most older American made motors a broken timing chain can fail noiselessly. It all depends on valve clearance inside the cylinder. Most older American engines have enough valve clearance to miss hitting the piston at TDC. Even then you would have briefly heard at least one of the cylinders blowing it's compression back through the intake manifold with backfire. The only other sound you most likely would hear would be the chain clanging around inside the housing. But I agree with Bob on the rest of his list of possible causes. Since you were running and the engine just died (I'm assuming instantly - it didn't "sputter" to a stop) this is electrical. More specifically - from 12v to the coil to the spark at the plugs. There are a number of things in between that might have failed which include; the coil, the HEI module under the rotor (this rarely fails with a complete open circuit but it CAN), the contact on the rotor itself, the capacitor connected to the HEI module (more common than a failed module). If you have the original ignition; a broken points contactor (little brass nub falls out of it's mount(rare but possible)) Even the ignition switch mounted on the steering column can fail in an instant (can happen on an '82 C10 - I'm not sure how the ignition voltage is supplied to the coil on a '71) ... what ever it is, it HAS to be common to all cylinders. A marginal plastic connector at the distributor/coil that can vibrate loose has been known to cause this (in my experience), or a broken coil winding, even. If you don't have one , borrow or by a volt meter and start checking one item at a time until you find where you are loosing ignition voltage.

Your Answer

Add photo

Related Questions

  • 71 c10 w/350 quit running on the freeway and won't start 4 answers

    I was driving on the freeway truck running fine but it just died and would not start back up. Cranks ok but that's it. Worked the throttle by hand and could see gas squirt from the primarys.

    1971 Chevrolet C/K 10

    -

    Maintenance & Repair

  • Ran my c10 71' out of gas the other day and ever since it won't stay running without me giving it gas. 4 answers

    It runs for about 3 mins without me giving it gas then sputters out and dies. Then I have to continue giving it gas to keep it running. I have not touched the timing. It ran prefect before I ran ...

    1971 Chevrolet C/K 10

    -

    Maintenance & Repair

  • Stopped running and won't start 39 answers

    was running and shut off and now it will turn over but not start. I have replaced the Coil, Int Module, Pickup coil. Basiclie rebuilt the Distributor. still not running. It is an 84 chevy c-10 305

    1985 Chevrolet C/K 10

    -

    Maintenance & Repair

  • won't start... 2 answers

    I have a Chevy c10 I have changed the coils... I have check both the starter and the alternator. I have even changed out the ignition starter switch. And it still will not start. Need some guides.

    1985 Chevrolet C/K 10

    -

    Maintenance & Repair

  • Chevy c10 4 answers

    Installed a new intake and carburator on my 1971 Chevy c10 it has the original 350 and after did not want to start people say the timing chain jumped a Thoth what may have happened ?

    1971 Chevrolet C/K 10

    -

    Maintenance & Repair

C/K 10

Looking for a Used C/K 10 in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.

Postal Code:

Shortcuts

Search Chevrolet C/K 10 Questions

Chevrolet C/K 10 Experts

#1 CaptPKelly
CaptPKelly
Reputation 680
#2 Rowefast
Rowefast
Reputation 370
#3 F_O_R
F_O_R
Reputation 360
View All

Related Models For Sale

Used Chevrolet Camaro
764 listings starting at $2,500
Used Ford F-100
1 listing
Used Ford Mustang
9 Great Deals out of 1,274 listings starting at $1,000
Used Chevrolet Blazer
15 listings starting at $1,789
Used Chevrolet Corvette
4 Great Deals out of 670 listings starting at $4,450

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.