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My ds450 2008 went through 2 ecu s in one week no spark why.

Customer Question
My ds450 2008 went...

My ds450 2008 went through 2 ecu s in one week no spark why

Mechanic's Assistant: What's the make/model/year of your bike?

The atv only has 10 hours on it i ordered a new ecu ran for a half hour engine light on no spark im pissed there expensive2008 ds450 x

Mechanic's Assistant: Has your vehicle stalled? Has anyone run a diagnostic test to pull the trouble code?

No just baught it

Mechanic's Assistant: What is the model of your '08 motorcycle?

When i put the new ecu in it started n ran fine next day samething

Mechanic's Assistant: Are you fixing your bike yourself? What have you tried so far?

New ecu

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Before that the fuel pump then the little relay went swaped them around ran fine

Submitted: 10 months ago.Category: Motorcycle
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Answered in 8 hours by:
9/22/2017
Motorcycle Mechanic: Louie, Technician replied 10 months ago
Louie
Louie, Technician
Category: Motorcycle
Satisfied Customers: 13,487
Experience: 25+ yrs. experience
Verified

Hi and welcome to JustAnswer, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.

Initially, let's try check and review the basics; the ECU's failing would most likely be indicative of a battery/charging issue and/or overloaded output. Proposed preliminary tries (if have not been done):

  • • re-inspect the battery, its ground lines to the harness, frame & engine, and/or re-check and re-clean the battery cables + terminals, connectors and wiring including);
  • • more importantly, have the battery externally charged; and
  • • then also have the battery LOAD TESTed (even if new/charged and just for the purpose of eliminating it as a suspect);
  • • check that the charging voltage @ ~3000RPM is about 14.5V but not to exceed 15.0V;
  • • cautiously determine if the ignition coil is excessively heating up.

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