Intermittent no start condition

John Nechiporchik · 09-17-2013, 09:27 AM

Rob, I will get a spark tester and noid light tonight and run the tests. I'll post results.

Thanks for the tips. Testing these systems is a lot better than starting to throw money at parts.

John Nechiporchik · 09-17-2013, 09:35 AM

Steve and SS 3011
Sunday when the engine was running, the fuel pressure was rock steady at 45psi.

Also, the set up has a crank trigger and I have no knowledge as to the questions SS raised on the signal source and timing of signal.
I'm hoping the problem lies in the coil, regulator or perhaps crank trigger as these are relatively easy (but not cheap) fixes. The tests Rob suggested will provide some direction. If this is an ECU based issue.....that's a whole different scenario!!

buzzinhalfdozen · 09-17-2013, 09:55 AM

I may be wrong but I seem to recall the digital 7's having an LED on them that when blinking during cranking indicate it's seeing a trigger (crank sensor input), you may want to read the instruction manual on that. If it's in fact the case and you're seeing it blink, that would indicate to me that the triggering is working correctly. I'm not familiar with your system but most merely piggyback off the MSD for RPM (trigger) events which it needs to operate. Would be a quick way of determining what side to look at spark or fuel. Joe

John Nechiporchik · 09-17-2013, 09:58 AM

Thanks. I'll check out the MSD instructions.

09-17-2013, 09:27 AM	#1
John Nechiporchik Member Join Date: Mar 2007 Location: Grosse Ile Mi. Posts: 316 Likes: 84 Liked 13 Times in 7 Posts	Re: Intermittent no start condition Rob, I will get a spark tester and noid light tonight and run the tests. I'll post results. Thanks for the tips. Testing these systems is a lot better than starting to throw money at parts.

09-17-2013, 09:35 AM	#2
John Nechiporchik Member Join Date: Mar 2007 Location: Grosse Ile Mi. Posts: 316 Likes: 84 Liked 13 Times in 7 Posts	Re: Intermittent no start condition Steve and SS 3011 Sunday when the engine was running, the fuel pressure was rock steady at 45psi. Also, the set up has a crank trigger and I have no knowledge as to the questions SS raised on the signal source and timing of signal. I'm hoping the problem lies in the coil, regulator or perhaps crank trigger as these are relatively easy (but not cheap) fixes. The tests Rob suggested will provide some direction. If this is an ECU based issue.....that's a whole different scenario!!

09-17-2013, 09:55 AM	#3
buzzinhalfdozen Senior Member Join Date: Sep 2006 Location: Bellevue Ohio Posts: 984 Likes: 0 Liked 11 Times in 8 Posts	Re: Intermittent no start condition I may be wrong but I seem to recall the digital 7's having an LED on them that when blinking during cranking indicate it's seeing a trigger (crank sensor input), you may want to read the instruction manual on that. If it's in fact the case and you're seeing it blink, that would indicate to me that the triggering is working correctly. I'm not familiar with your system but most merely piggyback off the MSD for RPM (trigger) events which it needs to operate. Would be a quick way of determining what side to look at spark or fuel. Joe __________________ Joe Buchanan SS/BX 3117

09-17-2013, 09:58 AM	#4
John Nechiporchik Member Join Date: Mar 2007 Location: Grosse Ile Mi. Posts: 316 Likes: 84 Liked 13 Times in 7 Posts	Re: Intermittent no start condition Thanks. I'll check out the MSD instructions.