wont rev

dwg4859 · 07-30-2014, 12:28 PM

I have a 71 nova with a 278 hp 350 the car wint rev past 5200 on the track but does in burn out. i changed fuel pump and reg thinking it would solve it i raced sat and it didnt it has a hy cam with lifters with shims in them i set the valve lash at 0. where should i look next
thank you

Mike Taylor 3601 · 07-30-2014, 08:21 PM

have msd chip rev limiter take chip out,they will rev in water and shut off under load if bad.
Mike Taylor 3601

dwg4859 · 07-30-2014, 09:01 PM

i don't have msd i have a hei only, the fuel pressure Gage never drops below 5 psi, do i need a msd?

bigfoot584 · 07-30-2014, 09:57 PM

Also disconnect tach.

Change the HEI cap and rotor also, any HEI will work your
just testing to see if it runs fine, if it dose you can repair or
replace yours then, but that take the whole dist. out
loop completely.

No you don't need a msd if it ran before it'll run again (I don't need no stinking msd).

dwg4859 · 07-30-2014, 10:02 PM

thankx i will

stk1333 · 08-06-2014, 07:45 PM

Had a similer problem,would only go 5000 in 1st gear,ok in 2nd and 3rd.changed pump,regulator,filter,cap,rotor and unhooked the tach(not all at once lol) changed the hei control module and it works perfect

jim powers · 08-07-2014, 08:05 AM

try 7 lbs. fuel pressure

Todd Hoven · 08-07-2014, 09:19 AM

Need to look at that HEI module. I had one in a car I was trying to sell. It ran me through the ringer. I bought and tried 3 different modules before I bought an MSD replacement, and that fixed it. If you know somebody with a distributor machine you might want to take it there and have it checked out for yourself. I've heard GM had different part numbers for modules, and the ones that came in the HP cars were the ones to use.

Jim Bailey · 08-07-2014, 10:27 AM

Todd's right. You can actually have it tested at your local Auto Zone store. That's if you're lucky enough to find someone there that knows how to do it. But, "they do" have the machine.

Jacob Pitt · 08-07-2014, 11:38 AM

Make sure your secondaries are opening too. Don't ask me how I know about that. Hahaha

07-30-2014, 12:28 PM	#1
dwg4859 Junior Member Join Date: Jul 2014 Location: oklahoma Posts: 33 Likes: 0 Liked 0 Times in 0 Posts	wont rev I have a 71 nova with a 278 hp 350 the car wint rev past 5200 on the track but does in burn out. i changed fuel pump and reg thinking it would solve it i raced sat and it didnt it has a hy cam with lifters with shims in them i set the valve lash at 0. where should i look next thank you

07-30-2014, 08:21 PM	#2
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,303 Likes: 198 Liked 116 Times in 48 Posts	Re: wont rev have msd chip rev limiter take chip out,they will rev in water and shut off under load if bad. Mike Taylor 3601

07-30-2014, 09:01 PM	#3
dwg4859 Junior Member Join Date: Jul 2014 Location: oklahoma Posts: 33 Likes: 0 Liked 0 Times in 0 Posts	Re: wont rev i don't have msd i have a hei only, the fuel pressure Gage never drops below 5 psi, do i need a msd?

07-30-2014, 09:57 PM	#4
bigfoot584 Junior Member Join Date: Jun 2014 Posts: 43 Likes: 0 Liked 0 Times in 0 Posts	Re: wont rev Also disconnect tach. Change the HEI cap and rotor also, any HEI will work your just testing to see if it runs fine, if it dose you can repair or replace yours then, but that take the whole dist. out loop completely. No you don't need a msd if it ran before it'll run again (I don't need no stinking msd). Last edited by bigfoot584; 07-30-2014 at 10:06 PM.

07-30-2014, 10:02 PM	#5
dwg4859 Junior Member Join Date: Jul 2014 Location: oklahoma Posts: 33 Likes: 0 Liked 0 Times in 0 Posts	Re: wont rev thankx i will

08-06-2014, 07:45 PM	#6
stk1333 Junior Member Join Date: Jan 2013 Posts: 2 Likes: 0 Liked 0 Times in 0 Posts	Re: wont rev Had a similer problem,would only go 5000 in 1st gear,ok in 2nd and 3rd.changed pump,regulator,filter,cap,rotor and unhooked the tach(not all at once lol) changed the hei control module and it works perfect

08-07-2014, 08:05 AM	#7
jim powers Member Join Date: Nov 2001 Location: manville nj Posts: 356 Likes: 183 Liked 14 Times in 10 Posts	Re: wont rev try 7 lbs. fuel pressure

08-07-2014, 09:19 AM	#8
Todd Hoven VIP Member Join Date: Jul 2007 Posts: 1,329 Likes: 883 Liked 720 Times in 151 Posts	Re: wont rev Need to look at that HEI module. I had one in a car I was trying to sell. It ran me through the ringer. I bought and tried 3 different modules before I bought an MSD replacement, and that fixed it. If you know somebody with a distributor machine you might want to take it there and have it checked out for yourself. I've heard GM had different part numbers for modules, and the ones that came in the HP cars were the ones to use. __________________ Todd Hoven 1035 Stock

08-07-2014, 10:27 AM	#9
Jim Bailey Senior Member Join Date: Aug 2004 Posts: 699 Likes: 17 Liked 568 Times in 106 Posts	Re: wont rev Todd's right. You can actually have it tested at your local Auto Zone store. That's if you're lucky enough to find someone there that knows how to do it. But, "they do" have the machine.

08-07-2014, 11:38 AM	#10
Jacob Pitt Junior Member Join Date: Feb 2010 Location: Mansfield, Tx Posts: 57 Likes: 1 Liked 1 Time in 1 Post	Re: wont rev Make sure your secondaries are opening too. Don't ask me how I know about that. Hahaha __________________ Family Tradition Racing