Shut engine off experianced run on, starts and runs a few seconds then wont start at all

Asked by Sep 08, 2014 at 09:12 AM about the 1967 Chevrolet Chevelle

Question type: Maintenance & Repair

I have a 1967 Chevy Chevelle with a Merlin big block Chevy motor. I was driving to a car show pulled in a parking lot shut the motor off and I had run on culminated by spoke through Carb. I wouldnt start after so I towed it home. I cleaned plugs and changed coil it starts and runs a few seconds dies and wont even fire untill the next day? I have fuel it has MSD spark box. Do you have any ideas??

7 Answers

38,615

Can you check the MSD box to see if it's working properly?

1 people found this helpful.

I dont know how to check it, I guess if I start it and it fails again I can check and see if there is spark

38,615

Or just pull a plug and ground it good to see if you have spark.

1 people found this helpful.
299,285

For the run on engine.."If you are running an MSD box, you need to install the Diode that should have been included in the kit. It goes inline between the box and the coil. The capacitance of the box may continue feeding the coil after the power is cut. The diode allows voltage in only one direction so it will block any backfeed after you shut down." Not sure why you can't start it again. Rebuild the carb recently? How old is the fuel?

I dont see a diode, however it has ran good for 3 years. I thought about the carb because it backfired through the carb before it shut down. I think there are some blowout valves in a Holley 4100 Thanks

75

To me sounds like carb.flote needle is leaking past and would cause the smoke from carb. After turning it off .

75

That leaking needle seat then would cause a flooding condition making it hard to start

Your Answer:

Chevelle

Looking for a Used Chevelle in your area?

CarGurus has 355 nationwide Chevelle listings and the tools to find you a great deal.

ZIP:

Chevrolet Chevelle Experts

  • #1
    Squatt
    Reputation
    730
  • #2
    18TandSVT
    Reputation
    250
  • #2
    ChevelleGuru
    Reputation
    250
View All

Related Models For Sale

Used Chevrolet Camaro
259 Great Deals out of 27,088 listings starting at $2,900
Used Chevrolet Corvette
72 Great Deals out of 15,124 listings starting at $4,499
Used Ford Mustang
296 Great Deals out of 39,978 listings starting at $1,312
Used Chevrolet Impala
525 Great Deals out of 26,142 listings starting at $995
Used Chevrolet Nova
155 listings
Used Dodge Charger
332 Great Deals out of 32,185 listings starting at $2,000
Used Chevrolet Malibu
629 Great Deals out of 51,317 listings starting at $1,550
Used Pontiac GTO
5 Great Deals out of 394 listings starting at $6,979
Used Pontiac Firebird
5 Great Deals out of 692 listings starting at $3,995
Used Chevrolet Bel Air
254 listings
Used Chevrolet Caprice
158 listings starting at $6,995

Used Cars For Sale

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.