Intermittent no start condition

John Nechiporchik · 09-17-2013, 08:39 PM

Correction: injector P/N is 280150756....Bosch30#

SuperStock 1890 · 09-17-2013, 09:41 PM

John,
Give me a call tomorrow later in the day. We had this at one time too. I will walk you through the tests. Call after 4. I have a charity golf outing.

Rich

John Nechiporchik · 09-17-2013, 10:02 PM

Will do.
Thanks

ss3011 · 09-18-2013, 12:03 AM

Get a noid from any NAPA, or Snap On, Matco, etc.

Rich Biebel · 09-18-2013, 07:10 AM

When the engine is in a no start condition...you need to just quickly see if the coil is firing as the engine cranks......

Get another coil wire with an old spark plug attached to one end......have it right under the hood ready to install on the coil and try to ground the plug on the engine.

Once it is in that no start condition install that wire with the spark plug on it into the coil and crank it.......if it has spark......quickly reinstall your normal coil wire and crank it....If spark was always there.....and it does not start.....and fuel pressure is good on your gauge.....45-50lbs......

Well it narrows it down to the ECU and fuel injectors.

There should be a tach signal from the MSD box to the ECU if I recall right. There is a single wire connection from the MSD to the ECU that has to be there and polarity correct.......That was the one I had trouble with.

Wire connections or a ground issue sound like what might be your problem......

I would go over all of that. The wiring diagram for the Accel ECU's was not hard to find and if I could recall the exact connections I would tell you but it's been a while....

It was all available at Accels DFI website.....

John Nechiporchik · 09-18-2013, 10:11 AM

Rich, I did test the coil immediately after experiencing the no-start condition. I placed the spark tester between the coil and the coil wire. Spark was there. I did not, however, test it on the other side of the coil wire (your process). I will do that tomorrow. That would eliminate or validate a bad coil wire. I will go through all the wiring this weekend....after I do the noid test.
I will find a noid between now and the weekend.
Thanks.

buzzinhalfdozen · 09-18-2013, 11:42 AM

Quote:

Originally Posted by John Nechiporchik

Rich, I did test the coil immediately after experiencing the no-start condition. I placed the spark tester between the coil and the coil wire. Spark was there. I did not, however, test it on the other side of the coil wire (your process). I will do that tomorrow. That would eliminate or validate a bad coil wire. I will go through all the wiring this weekend....after I do the noid test.
I will find a noid between now and the weekend.
Thanks.

Having spark coming out of the coil indicates you indeed do have the necc. trigger to initiate spark. Where you tested it isn't an issue, you've proven that the MSD portion is operational. I really doubt you would have a bad coil wire causing this as you would have other symptoms. Though it is a good idea to regularly change the coil wire as all the spark energy is directed thru it as opposed to single events thru the plug wires. Seems as though you are down to correct signaling to EFI controller or the controoler itself, BTW how are your injectors powered? The ECU merely provides the ground, if your power to the injectors is erratic you'll see the same issue. Joe

09-17-2013, 08:39 PM	#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 Correction: injector P/N is 280150756....Bosch30#

09-17-2013, 09:41 PM	#2
SuperStock 1890 Junior Member Join Date: Aug 2005 Posts: 87 Likes: 0 Liked 0 Times in 0 Posts	Re: Intermittent no start condition John, Give me a call tomorrow later in the day. We had this at one time too. I will walk you through the tests. Call after 4. I have a charity golf outing. Rich __________________ You don't know what you don't know yet.

09-17-2013, 10:02 PM	#3
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 Will do. Thanks

09-18-2013, 12:03 AM	#4
ss3011 Senior Member Join Date: Feb 2002 Location: Southeast Michigan Posts: 909 Likes: 70 Liked 239 Times in 114 Posts	Re: Intermittent no start condition Get a noid from any NAPA, or Snap On, Matco, etc.

09-18-2013, 07:10 AM	#5
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,315 Likes: 25 Liked 544 Times in 213 Posts	Re: Intermittent no start condition When the engine is in a no start condition...you need to just quickly see if the coil is firing as the engine cranks...... Get another coil wire with an old spark plug attached to one end......have it right under the hood ready to install on the coil and try to ground the plug on the engine. Once it is in that no start condition install that wire with the spark plug on it into the coil and crank it.......if it has spark......quickly reinstall your normal coil wire and crank it....If spark was always there.....and it does not start.....and fuel pressure is good on your gauge.....45-50lbs...... Well it narrows it down to the ECU and fuel injectors. There should be a tach signal from the MSD box to the ECU if I recall right. There is a single wire connection from the MSD to the ECU that has to be there and polarity correct.......That was the one I had trouble with. Wire connections or a ground issue sound like what might be your problem...... I would go over all of that. The wiring diagram for the Accel ECU's was not hard to find and if I could recall the exact connections I would tell you but it's been a while.... It was all available at Accels DFI website..... __________________ Rich Biebel S/C 1479 Stock 147R Last edited by Rich Biebel; 09-18-2013 at 07:18 AM.

09-18-2013, 10:11 AM	#6
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 Rich, I did test the coil immediately after experiencing the no-start condition. I placed the spark tester between the coil and the coil wire. Spark was there. I did not, however, test it on the other side of the coil wire (your process). I will do that tomorrow. That would eliminate or validate a bad coil wire. I will go through all the wiring this weekend....after I do the noid test. I will find a noid between now and the weekend. Thanks.