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-   -   How can you tell if ECM is Bad? at the end of ideas (https://blazerforum.com/forum/engine-transmission-35/how-can-you-tell-if-ecm-bad-end-ideas-98394/)

Bayla 12-19-2018 10:56 PM
How can you tell if ECM is Bad? at the end of ideas
 
I have a 1995 with 4.3 vortex that will crank but not start...I have replaced, Mass air, MAP, cam position, crank position, distributor, rotter, wires, plugs, O2 sensor, Fuel Pump, Fuel Filter......has great compression...I'm out of ideas....could use some advise from someone smarter than me:)

LesMyer 12-20-2018 07:13 AM
Originally Posted by Bayla (Post 699859)
I have a 1995 with 4.3 vortex that will crank but not start...I have replaced, Mass air, MAP, cam position, crank position, distributor, rotter, wires, plugs, O2 sensor, Fuel Pump, Fuel Filter......has great compression...I'm out of ideas....could use some advise from someone smarter than me:)
#1: Have you had the distributor out? if so, was that when the engine stopped running? #2 Do you have spark at the coil while cranking? #3 Will engine start if you pour a little gas down the throttle body?

Bayla 12-21-2018 11:48 AM
Thanks you for replying..You won’t believe what it was!! ECM computer connector worked its way loose!! I never would have found it..got desperate though might need a new ECM:) I’m new to Blazerforum and a new owner of 1995 GMC Jimmy 4x4....I bought it for $1,500..145,000 miles..Suposed to be a backup truck ...now I fell in love with it trying to restore..I have lots of questions:) lol thanks again


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