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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.....

09-18-2013, 07:10 AM	#2
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.