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


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

1 out of 1 people think this is 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


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

1 out of 1 people think this is helpful.
Tom Demyan

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


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


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

Your Answer

Add photo

Related Questions

  • Engine will not start 2 answers

    1971 Chevelle has been parked 1 1/2 yrs. running previously. Replaced spark plugs, poured 5 gals of gas with high octane booster, new battery , oil looks clean, fuel pump getting gas to carb. (...

    1971 Chevrolet Chevelle


    Maintenance & Repair

  • 68 chevelle just cranks 4 answers

    i have a 68 chevelle 327 i was letting it run i heard a bang it stalled and i have not been able to start it it just cranks it does not seem to be getting spark or fuel? i took the dist cap off and ...

    1968 Chevrolet Chevelle


    Maintenance & Repair

  • transmission trouble. 4 answers

    My 1969 chevelle malibu it has a 327 with a powerglide transmission, I notice that when I start the engine and select drive it won't engage unless I acelerate at high rpm,and sometimes will engage, th...

    1969 Chevrolet Chevelle


    Maintenance & Repair

  • I have a 72 Chevelle and it will fire on the let off of the key but won't start, acts like it doesn't get enough gas but when you pump it a few times it then acts like it is flooded. 1 answer

    It has a Carter Carb on it. Wondered if something is wired wrong because of it firing when you let off the key.

    1972 Chevrolet Chevelle SS


    Maintenance & Repair

  • How much is a 67 Chevelle SS 396 worth. 7 answers

    I'm trying to help a family member sell a 67 Chevelle SS 396. The interior needs replaced, the body is decent. Needs sanded, primed and painted. Frame is great, NO engine or transmission. Looking ...

    1967 Chevrolet Chevelle


    Shopping & Pricing


Looking for a Used Chevelle in your area?

CarGurus has 410 nationwide Chevelle listings and the tools to find you a great deal.


Search Chevrolet Chevelle Questions

Chevrolet Chevelle Experts

#1 Squatt
Reputation 560
#2 LouB
Reputation 260
#3 18TandSVT
Reputation 230
View All

Related Models For Sale

Used Chevrolet Camaro"
812 Great Deals out of 38,797 listings starting at $2,650
Used Chevrolet Corvette"
412 Great Deals out of 20,178 listings starting at $3,688
Used Ford Mustang"
717 Great Deals out of 41,256 listings starting at $900
Used Chevrolet Impala"
948 Great Deals out of 35,754 listings starting at $700
Used Dodge Charger"
641 Great Deals out of 29,902 listings starting at $1,995
Used Chevrolet Nova"
195 listings
Used Pontiac GTO"
10 Great Deals out of 513 listings starting at $5,995
Used Chevrolet Malibu"
1,146 Great Deals out of 72,632 listings starting at $695
Used Pontiac Firebird"
11 Great Deals out of 895 listings starting at $2,900
Used Chevrolet Caprice"
201 listings starting at $10,900