SeattleDIY
New member
I have a 2004 BF150A (BANJ-1000792) that I bought new, has only 200 hours, and was upside down in salt water once in 2012 (long story). It has been reliable, but in the last year I have been chasing problems.
My issue now is that the engine starts every time, runs smoothly, but dies every time after 5 seconds. In this cycle it does not trip the check engine light, or sound any alarms. I can do it 15 times in a row -- no change.
The oil pressure light stays green, the temp and alternator lights stay off. The pre start sequence with the key and lights flashing and 2 beeps are all normal. All fuses are good. No water in the water separator.
Thinking it was a fuel thing, I have cleaned out the vapor separator and replaced the HP and LP screens, and am running on new gas from a clean tank. My fuel pressure reads 47.
Next I thought it could be the main relay, it tested out per the shop manual, but I replaced it anyway -- no change.
Next I thought it was an IAC valve problem, it failed the shop manual test (page 5-43, #3, there was continuity between #1 on the harness and ground) so I replaced the IAC valve per the manual -- no change.
I have learned how to add throttle right before it dies, and can then get it to stay running -- but it goes through a rough patch and the check engine light comes on and an alarm sounds (beeping, not continuous).
It will idle smoothly after that, but with the alarm sounding. I am running in a tank, so I don't like to go up too far on the RPMs, but it seems to run smoothly up to maybe 2,000.
I don't have a code reader, but doing the paper clip thing, I read 4 short flashes. From that I believe the manual says I have a CKP sensor problem.
I ran through the steps and found the failure (page 5-33, #3, there was battery voltage between #1 on the harness and ground) the remedy is: "Repair open in the CKP sensor ground circuit"
So, my question is: Could CKP sensor be the cause of my problem or is it another problem in addition to whatever is causing the engine to die at 5 seconds? After all, it starts and dies at idle without throwing the CKP sensor alarm. Also, I have not been able to find a new main wiring harness - and am reluctant to pay $300 for a used one on eBay -- which could introduce other new problems. So what do I do next?
Thank you all in advance for the help. I have been reading this forum for a couple of years and you have all helped me tremendously. I am eager to hear what everyone thinks this may be.
My issue now is that the engine starts every time, runs smoothly, but dies every time after 5 seconds. In this cycle it does not trip the check engine light, or sound any alarms. I can do it 15 times in a row -- no change.
The oil pressure light stays green, the temp and alternator lights stay off. The pre start sequence with the key and lights flashing and 2 beeps are all normal. All fuses are good. No water in the water separator.
Thinking it was a fuel thing, I have cleaned out the vapor separator and replaced the HP and LP screens, and am running on new gas from a clean tank. My fuel pressure reads 47.
Next I thought it could be the main relay, it tested out per the shop manual, but I replaced it anyway -- no change.
Next I thought it was an IAC valve problem, it failed the shop manual test (page 5-43, #3, there was continuity between #1 on the harness and ground) so I replaced the IAC valve per the manual -- no change.
I have learned how to add throttle right before it dies, and can then get it to stay running -- but it goes through a rough patch and the check engine light comes on and an alarm sounds (beeping, not continuous).
It will idle smoothly after that, but with the alarm sounding. I am running in a tank, so I don't like to go up too far on the RPMs, but it seems to run smoothly up to maybe 2,000.
I don't have a code reader, but doing the paper clip thing, I read 4 short flashes. From that I believe the manual says I have a CKP sensor problem.
I ran through the steps and found the failure (page 5-33, #3, there was battery voltage between #1 on the harness and ground) the remedy is: "Repair open in the CKP sensor ground circuit"
So, my question is: Could CKP sensor be the cause of my problem or is it another problem in addition to whatever is causing the engine to die at 5 seconds? After all, it starts and dies at idle without throwing the CKP sensor alarm. Also, I have not been able to find a new main wiring harness - and am reluctant to pay $300 for a used one on eBay -- which could introduce other new problems. So what do I do next?
Thank you all in advance for the help. I have been reading this forum for a couple of years and you have all helped me tremendously. I am eager to hear what everyone thinks this may be.