Car starts and runs as soon as I hit the throttle it dies??

Asked by Lukeyd Jul 23, 2015 at 12:46 AM about the 1986 Mercedes-Benz 420-Class

Question type: Maintenance & Repair

Hi all, my father has a 1986 420sel he
has just fitted another engine to it.
It is a 500 engine but the problem is
as soon as you hit the throttle it dies.
It will idle ok can any body help us
please?
Thanks luke

1 Answer

640

Most likely it is your ignition coil or spark plug wire. Where these replaced when the newer engine installed? If not that could be the culprit. If they were check your fuel pump, cable battery connection, ignition control module, and the crankshaft Position Sensor. Let me know if that helps.

1 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    Habib Sherdil
    Reputation
    70
  • #1
    importguy
    Reputation
    70
  • #1
    BoholMark
    Reputation
    70
View All

Find great deals from top-rated dealers

Search

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