Died while pulling KOER test, now no start
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Freshman User
Joined: Aug 2007
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Died while pulling KOER test, now no start
was farting around and decided to pull codes off my 93 f150 4.9. No codes at all for KOEO. Started the KOER test. Halfway through the cylinder balance check the motor cut off. Now it's a no start. Not a fuel issue. Starter fluid into the throttle body had no effect. I've used this code reader a number of times before with no problems. It cranks without catching. Did I fry my ECM somehow?
Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
Unfortunately there isn't a cylinder balance test available for SD equipped trucks. Only trucks with MAF has that option.
Verify spark.
Try removing the SPOUT connector and try to start the engine.
If no spark still, disconnect PCM harness and see if spark returns.
Verify spark.
Try removing the SPOUT connector and try to start the engine.
If no spark still, disconnect PCM harness and see if spark returns.
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Freshman User
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verified no spark, pulled the SPOUT, again no spark. Reattached the SPOUT, pulled the PCM, no spark. Left the PCM off, pulled the SPOUT, no spark. Decided to start over with the primary side of the coil. Constant 12v. checked continuity between the ICM and coil, all within spec. Replaced the ICM. Bingo! Wondering now if the code reader had something to do with the ICM failure as that unit was only 3 years old. the idle g
Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
What brand of ICM?
The truck I bought for cheap and wouldn't start was due to cheap over the counter parts. It was an Master Pro/ O'Reilly brand.
Yanked the 22 year old ICM off my other truck, Fired right up. Went to junkyard and bought 3 for $30.
The truck I bought for cheap and wouldn't start was due to cheap over the counter parts. It was an Master Pro/ O'Reilly brand.
Yanked the 22 year old ICM off my other truck, Fired right up. Went to junkyard and bought 3 for $30.
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