i put in a e303 cam - 1982-1993 Mustang GT Registry Message Board

sleeper · 10-17-2009, 05:10 PM

and now when i stop it will die can u help me

need4spd90 · 10-17-2009, 09:07 PM

what else did you install along with the cam? heads? intake?

if its just the cam,my advice would be to put the stock cam back in and sell the E303..you'll be sadly disappointed at the performance(more like lack there of) of your cam install if you still have the stock heads..most likely lose some low end tq and driveability will suffer(as you've already noticed)

Chris-90LX · 10-17-2009, 09:29 PM

I see you have a 1986. Are you still running speed density or did you upgrade to mass air?

Do a code scan just for the heck of it. Check to make sure all of your vacuum lines are reconnected correctly.

I would reset the ISC. The engine will idle differently on account of the cam shaft upgrade.

skunk · 10-17-2009, 10:07 PM

Like stated way more info needed before help can be provided. example, what other mods, heads, intake, rockers, etc. did you degree the cam or not, run a KOEO test for codes. basic stuff like that.

GTvert90 · 10-18-2009, 09:23 AM

Check PTV and pushrod length?

Like they said did you convert to MAF? Stock E6 Heads and flat top pistons?

sleeper · 10-18-2009, 12:04 PM

Quote:

Originally Posted by Chris-90LX

I see you have a 1986. Are you still running speed density or did you upgrade to mass air?

Do a code scan just for the heck of it. Check to make sure all of your vacuum lines are reconnected correctly.

I would reset the ISC. The engine will idle differently on account of the cam sh

aft upgrade.

no other upgrades yet still stock thanks for any help you can give

93 LX 5.0 · 10-18-2009, 02:28 PM

the cam is no good without supporting mods (heads, intake, etc..)

you're also running a speed-density fuel injection which is not ideal for aggressive cams.

if the car is an automatic i dont think there is a way for that cam to even work.

GTvert90 · 10-18-2009, 02:48 PM

Yank the E cam out and put your stock one back in

need4spd90 · 10-19-2009, 08:03 AM

Quote:

Originally Posted by sleeper

no other upgrades yet still stock thanks for any help you can give

which leads you back to post #2....

did you change the valve springs as well? cuz the stock valve springs wont support ANY aftermarket cam..they're not strong enuff and your valves will float,and the car will run like a total piece of crap

you can install the stock cam advanced or retarded 4*..
advancing it will move your peak hp/tq lower in the rpm range by a few hundred rpm's,great for a low end torquey street machine

retarding the cam timing will move your peak hp/tq higher in the rpm rnage,more suited for the track

add some 1.7 roller rockers,a 65mm throttlebody and explorer intake,some longtube headers,but the timing to 14* and get a 70mm MAF from a 94-95 GT and that should wake the car up if you cant afford to change the heads right now

skunk · 10-19-2009, 05:34 PM

what are you pulling for vacuum? just like the others posted too me installing a more aggressive cam on a stock motor is just a nono and backwards. like need4spd90 stated the stock valve springs are not up to the job and pop on a set of 1.7's and they are for sure done.The stock cam is pretty healthy and swapping on some better heads, etc would have been a better HP gain than you are going to ever see from that E cam. I'm very pro on degreeing a cam and varifying the timing events but that is just me. you are absolutely hitting a wall with those E6 heads and killing any potenial that cam has to offer, the heads just will not flow enough.

you could have a vacuum leak somewhere or don't have enough vacuum. check for leaks and run a vacuum test at idle and in the upper rpms. also check your timing too make sure it's not too retarted, make sure the timing marks on the balancer haven't slipped and you are timing it right. next run a compression test. like 90CobraGTvert stated PTV clearance would have been a good idea and checking push rod length also hopefully you didn't bend anything.

WATSONFITZ7 · 10-24-2009, 08:39 PM

Your car is speed density, that cam will not work unless you switch to carb, you can reset idle,e-cams idle best at 900rpms

Andrew jerald · 11-29-2009, 04:38 PM

I ran a Trick flow cam with speed density the car idle from 500 rpms to 1000 rpms. Car ran good just idle like crap then i switch to carb and that fix all the issues i was having. You will probably half to upgrade valve springs for your heads.

Quote:

Originally Posted by WATSONFITZ7

Your car is speed density, that cam will not work unless you switch to carb, you can reset idle,e-cams idle best at 900rpms

10-17-2009, 05:10 PM	#1
sleeper Junior Member Join Date: Oct 2009 Location: auburndale FL. U.S.A Posts: 2	i put in a e303 cam and now when i stop it will die can u help me

10-17-2009, 10:07 PM	#4
skunk 2010 Donating Member Join Date: May 2008 Location: Massachusetts Posts: 457	Like stated way more info needed before help can be provided. example, what other mods, heads, intake, rockers, etc. did you degree the cam or not, run a KOEO test for codes. basic stuff like that. __________________ 1991 GT white/ Titanium. 5.0. plenty of engine mods, built T5, built 8.8 w 3.73 & '03 cobra diff, plenty of MMS stuff both suspension and braces, Bullitt springs & plenty more stuff MCCNE member MCA member IAFF retired local 2194

10-18-2009, 09:23 AM	#5
GTvert90 Senior Member Join Date: Jun 2006 Location: Illinois Posts: 1,044	Check PTV and pushrod length? Like they said did you convert to MAF? Stock E6 Heads and flat top pistons? __________________ MGW short throw shifter UPR X pipe Hedman Shorties 70mm Mass Air Flow Sensor

10-18-2009, 02:28 PM	#7
93 LX 5.0 Senior Member Join Date: Jan 2006 Location: MA Posts: 1,163	the cam is no good without supporting mods (heads, intake, etc..) you're also running a speed-density fuel injection which is not ideal for aggressive cams. if the car is an automatic i dont think there is a way for that cam to even work. __________________ Dorothy Mantooth is a saint! bucket: http://s949.photobucket.com/albums/ad338/mguy03 tube: http://www.youtube.com/mguy03 91 GT lots of work in slow progress

10-18-2009, 02:48 PM	#8
GTvert90 Senior Member Join Date: Jun 2006 Location: Illinois Posts: 1,044	Yank the E cam out and put your stock one back in __________________ MGW short throw shifter UPR X pipe Hedman Shorties 70mm Mass Air Flow Sensor

10-17-2009, 09:07 PM	#2
need4spd90 Senior Member Join Date: Sep 2005 Location: Mountain Top,PA Posts: 1,612	what else did you install along with the cam? heads? intake? if its just the cam,my advice would be to put the stock cam back in and sell the E303..you'll be sadly disappointed at the performance(more like lack there of) of your cam install if you still have the stock heads..most likely lose some low end tq and driveability will suffer(as you've already noticed) __________________ 1987 Notchback-GT40P heads,Bcam,Explorer intake 12.067 @ 112.94 1.687 60ft..so far..

10-17-2009, 09:29 PM	#3
Chris-90LX Moderator Ambassador 2008 Donating Member Join Date: Mar 2001 Location: Fitchburg, MA. USA Posts: 11,268	I see you have a 1986. Are you still running speed density or did you upgrade to mass air? Do a code scan just for the heck of it. Check to make sure all of your vacuum lines are reconnected correctly. I would reset the ISC. The engine will idle differently on account of the cam shaft upgrade.

10-19-2009, 05:34 PM	#10
skunk 2010 Donating Member Join Date: May 2008 Location: Massachusetts Posts: 457	what are you pulling for vacuum? just like the others posted too me installing a more aggressive cam on a stock motor is just a nono and backwards. like need4spd90 stated the stock valve springs are not up to the job and pop on a set of 1.7's and they are for sure done.The stock cam is pretty healthy and swapping on some better heads, etc would have been a better HP gain than you are going to ever see from that E cam. I'm very pro on degreeing a cam and varifying the timing events but that is just me. you are absolutely hitting a wall with those E6 heads and killing any potenial that cam has to offer, the heads just will not flow enough. you could have a vacuum leak somewhere or don't have enough vacuum. check for leaks and run a vacuum test at idle and in the upper rpms. also check your timing too make sure it's not too retarted, make sure the timing marks on the balancer haven't slipped and you are timing it right. next run a compression test. like 90CobraGTvert stated PTV clearance would have been a good idea and checking push rod length also hopefully you didn't bend anything. __________________ 1991 GT white/ Titanium. 5.0. plenty of engine mods, built T5, built 8.8 w 3.73 & '03 cobra diff, plenty of MMS stuff both suspension and braces, Bullitt springs & plenty more stuff MCCNE member MCA member IAFF retired local 2194 Last edited by skunk : 10-19-2009 at 05:37 PM.

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