Intermittent no start condition

buzzinhalfdozen · 09-17-2013, 11:24 AM

Ok, so basically the MSD is sending a tach signal to your EFI which it needs to indicate that in fact the engine is running. So you're still back to the basics, which can be indicated by a blinking LED, no blink, no start. I prefer the noid lights with a short pigtail on them so I can position it for easy viewing while cranking, if you have a helper this is a non issue. Look at your injector connector and get a light with similar terminals, as they've made a few different types over the years, there are some "universal" ones to chose from.Joe

Rich Biebel · 09-17-2013, 11:40 AM

I have an MSD ignition tester and I just used it last Saturday.

It allows you to fire the ignition without running the engine.

It's a very handy item....but cost about $150 bucks I think

It can test the box, coil, chips and other items like a tach that is very often not accurate.......

buzzinhalfdozen · 09-17-2013, 11:59 AM

Quote:

Originally Posted by Rich Biebel

I have an MSD ignition tester and I just used it last Saturday.

It allows you to fire the ignition without running the engine.

It's a very handy item....but cost about $150 bucks I think

It can test the box, coil, chips and other items like a tach that is very often not accurate.......

YEP everyone running an MSD should have one of these. Mine is out of the toolbox nearly every race.

John Nechiporchik · 09-17-2013, 08:32 PM

Here's the latest:
Tried to start car....no start
Checked rocker switch to make sure it was working...OK
Checked power to MSD box...OK
tried to start car...fired right up.....3 times....then returned to no start condition
LED working on MSD w/power on
Used spark tester to check coil output....OK
Disconnected crank trigger lead and , with ignition, shorted out green to purple wire which caused spark tester on coil to flash as the short was applied intermittently. This test was done per MSD direction. The only question I have here is that the spark was very weak from this test. Not sure of the correct level of intensity, but will call MSD again tomorrow.
None of the local auto parts stores had a noid light....Harbor Freight has a kit for $35, but I'll try to locate an individual tomorrow. The injector is a Bosch 80150756 with two flat blade terminals.

I hope to test the injectors tomorrow.
I appreciate all of your ideas and help. We WILL figure this out!!!

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

09-17-2013, 11:24 AM	#1
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 Ok, so basically the MSD is sending a tach signal to your EFI which it needs to indicate that in fact the engine is running. So you're still back to the basics, which can be indicated by a blinking LED, no blink, no start. I prefer the noid lights with a short pigtail on them so I can position it for easy viewing while cranking, if you have a helper this is a non issue. Look at your injector connector and get a light with similar terminals, as they've made a few different types over the years, there are some "universal" ones to chose from.Joe __________________ Joe Buchanan SS/BX 3117

09-17-2013, 11:40 AM	#2
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,320 Likes: 25 Liked 557 Times in 217 Posts	Re: Intermittent no start condition I have an MSD ignition tester and I just used it last Saturday. It allows you to fire the ignition without running the engine. It's a very handy item....but cost about $150 bucks I think It can test the box, coil, chips and other items like a tach that is very often not accurate....... __________________ Rich Biebel S/C 1479 Stock 147R

09-17-2013, 08:32 PM	#4
John Nechiporchik Member Join Date: Mar 2007 Location: Grosse Ile Mi. Posts: 316 Likes: 85 Liked 13 Times in 7 Posts	Re: Intermittent no start condition Here's the latest: Tried to start car....no start Checked rocker switch to make sure it was working...OK Checked power to MSD box...OK tried to start car...fired right up.....3 times....then returned to no start condition LED working on MSD w/power on Used spark tester to check coil output....OK Disconnected crank trigger lead and , with ignition, shorted out green to purple wire which caused spark tester on coil to flash as the short was applied intermittently. This test was done per MSD direction. The only question I have here is that the spark was very weak from this test. Not sure of the correct level of intensity, but will call MSD again tomorrow. None of the local auto parts stores had a noid light....Harbor Freight has a kit for $35, but I'll try to locate an individual tomorrow. The injector is a Bosch 80150756 with two flat blade terminals. I hope to test the injectors tomorrow. I appreciate all of your ideas and help. We WILL figure this out!!!

09-17-2013, 08:39 PM	#5
John Nechiporchik Member Join Date: Mar 2007 Location: Grosse Ile Mi. Posts: 316 Likes: 85 Liked 13 Times in 7 Posts	Re: Intermittent no start condition Correction: injector P/N is 280150756....Bosch30#

09-17-2013, 09:41 PM	#6
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	#7
John Nechiporchik Member Join Date: Mar 2007 Location: Grosse Ile Mi. Posts: 316 Likes: 85 Liked 13 Times in 7 Posts	Re: Intermittent no start condition Will do. Thanks