U/SA help request

GTX JOHN · 03-02-2015, 03:08 PM

Look to see where on track you lost the time.
I have been having problems with MSD Coils
a lot in last couple of years. It reflects more on back 1/2
numbers and particularly MPH. I would borrow another coil
to try. Also Electrical stuff and connections slow the car down and
I would go thru all related wiring.

Sean Marconette · 03-02-2015, 03:27 PM

Mike,

My car has pulled that on me. I thought I lost a cam, everything checked out fine with the engine and leak down. I could not find anything mechanically wrong, and pulled all of the grounds and cleaned them. And magically the car was back to normal. What I found out was a bad ground was the problem. The data logger never showed a voltage issue or fuel pressure issue. But 3 passes in a row it kept slowing down more, and did not sound any different, after resorting to everything but mechanical it had to be an electrical issue.

Good luck

Sean

Lou Jeffery · 03-02-2015, 03:49 PM

My 302 2v Maverick slowed .4 when I installed the correct legal carb. instead of the 351W carb that we thought was correct. That said we did have a issue with failed camshaft lobes that did not have a audible miss just really laid down. Louis Jeffery

03-02-2015, 03:08 PM	#1
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,737 Likes: 2,822 Liked 2,489 Times in 699 Posts	Re: U/SA help request Look to see where on track you lost the time. I have been having problems with MSD Coils a lot in last couple of years. It reflects more on back 1/2 numbers and particularly MPH. I would borrow another coil to try. Also Electrical stuff and connections slow the car down and I would go thru all related wiring. __________________ John Irving 741 Stock 741 Super Stock

03-02-2015, 03:27 PM	#2
Sean Marconette Senior Member Join Date: Mar 2006 Posts: 977 Likes: 799 Liked 275 Times in 76 Posts	Re: U/SA help request Mike, My car has pulled that on me. I thought I lost a cam, everything checked out fine with the engine and leak down. I could not find anything mechanically wrong, and pulled all of the grounds and cleaned them. And magically the car was back to normal. What I found out was a bad ground was the problem. The data logger never showed a voltage issue or fuel pressure issue. But 3 passes in a row it kept slowing down more, and did not sound any different, after resorting to everything but mechanical it had to be an electrical issue. Good luck Sean __________________ Sean Marconette 84 Mustang 5060 SS/N

03-02-2015, 03:49 PM	#3
Lou Jeffery Junior Member Join Date: Nov 2013 Posts: 91 Likes: 0 Liked 0 Times in 0 Posts	Re: U/SA help request My 302 2v Maverick slowed .4 when I installed the correct legal carb. instead of the 351W carb that we thought was correct. That said we did have a issue with failed camshaft lobes that did not have a audible miss just really laid down. Louis Jeffery

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