5.9 360 fires but dies when let off key

Asked by thomaskennett Feb 02, 2016 at 03:33 AM about the 1984 Dodge RAM 150 LB 4WD

Question type: Maintenance & Repair

1984 w150. 5.9 360. fires while cranking. dies
when I let off the key.   ran wire from battery to coil
and it runs fine, hot wired a switch in.
new ballist on fire wall. new starter relay on wheel
well. new battery, alt, regulator.    any ideas ?

7 Answers


That is usually a bad ignition switch or on some Chrysler products they had a dual ballast resistor and one side would burn out so it would fire while cranking but quit when key was released from crank to run.

ok ill check those. would having it hot wired from spliced into coil power wire to battery make my alt push out too much amps when reved up?


If the key is turned on it shouldn't, it is possible with all that you have done you could have damaged the voltage regulator, believe me it doesn't take much to ruin one.

Well I replaced ignition switch on the column. didn't change anything , and replaced voltage regulator again.

my truck has a single ballist and it is brand new also


Did you check the coil for voltage in both crank and in run postitons?

1 people found this helpful.

Your Answer:

RAM 150

Looking for a Used RAM 150 in your area?

CarGurus has 1 nationwide RAM 150 listings and the tools to find you a great deal.

Postal Code:

Dodge RAM 150 Experts

  • #1
  • #2
  • #2
View All

Find great deals from top-rated dealers


Related Models For Sale

Used Ford F-150
76 Great Deals out of 5,944 listings starting at $2,995
Used Ford Mustang
30 Great Deals out of 909 listings starting at $4,888
Used Ford Ranger
9 Great Deals out of 715 listings starting at $4,499
Used Chevrolet Camaro
16 Great Deals out of 517 listings starting at $8,995

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. Content will be removed if CarGurus becomes aware that it violates our policies.