e303 cam

drdo · 03-14-2003, 02:35 PM

Please help i put an e303 cam on my 94 mustang and now it has trouble idling, what can i do to fix this. Any help would be greatly appreciated.

429mustang · 03-14-2003, 06:49 PM

have you checked the throttle position sensor? You may have to set everything (TPI/distributor) and reset the computer ( i don't remember what the procedure is as far as how long to leave the power unhooled and how long to keep it running after). Post this in the blue oval lounge, someone should know.

dgrobels · 03-14-2003, 09:46 PM

you can get an idle adjuster it goes betweeen the IAC valve and lets you rasie or lower the idle speed i set mine to 850-900 RPMS

429mustang · 03-14-2003, 11:02 PM

My car has the E-cam, after I put the motor back in and messed w/ the timing a little the only thing I did was set the idle around 750rpm and make sure the TPS was set (I think) around .998
THe only thing that seems weird is when I rev it quick and let off, the rpms drop quick down around 1000 and hang for a few seconds then drop back to 750. Maybe cause I haven't reset my computer, who knows.

dgrobels · 03-15-2003, 07:58 AM

my does that little hang thing too ...as soon as i put on the idle adjuster it did that no big deal.....

im about to put a cam in my 1991 GT here is the specs

220 226 480 480 with 1.6, I am also installing new valve springs with this cam give me some improvement on the top end? I also am putting it in becasue I run NOS and figured the stock cam was making me enough power while im on the bottle, this car is ok it goes low 13`s on the motor i am trying my hardest to go 12`s on the motor

Technick · 03-15-2003, 11:43 PM

The 94-95 Mustangs are real sensitive to cam changes, if it works great on a 89-93 mass air car, it may not have the same idle quality on the 94-95 5.0. I have found that sometimes the only permanent fix is to make sure the cam has at least a 114 degree lobe seperation angle. All of the Motorsport cams are 112 degree lobe seperation. The stock 94-95 has a 115 degree lobe seperation. That is why Steeda offers 2 versions of their cams. Everything the same except for the lobe seperation for the 94-95 cars. The idle and throttle responce is truely better with the 114 degree lobe seperation angle on the 94-95 cars. Also you will notice that a lot of turbo and supercharger cams (read EFI)have a 114 degree lobe seperation angle (unless it is a high rpm race engine) because there is less tendency to blow boost out the exhaust valve from the inherent overlap caused by the 112 degree cams. Now that is not to say that everyone has had a problem, it is just a real good fix for those who are tired of trying to adjust around it.

88workcar · 03-16-2003, 09:37 AM

I can assure you it is not the cam. I have an E cam, cobra intake, 65mmTB, Exhast, and a supercharger. On a SPEED DENSITY car. Mine idles great, it is not the cam.

Technick · 03-16-2003, 04:02 PM

Yea, BUT not on a 94-95 5.0. That is the only combo that seems to have a problem with the 112 degree lobe seperation cams. I thought I made that point clear. drdo has a 94 5.0 I have put plenty of E cams in 87-93 5.0's with no problem. Cannot say the same about the 94-95 5.0.

drdo · 03-19-2003, 03:06 PM

thanks

03-14-2003, 02:35 PM	#1
drdo Registered Member Join Date: Mar 2003 Posts: 2	e303 cam Please help i put an e303 cam on my 94 mustang and now it has trouble idling, what can i do to fix this. Any help would be greatly appreciated.

03-14-2003, 06:49 PM	#2
429mustang Registered Member Join Date: May 2001 Location: westerville, OH USA Posts: 618	have you checked the throttle position sensor? You may have to set everything (TPI/distributor) and reset the computer ( i don't remember what the procedure is as far as how long to leave the power unhooled and how long to keep it running after). Post this in the blue oval lounge, someone should know. __________________ 1990 Notchback: BBK Ceramic Coated Full length headers, Dr. Gas 3"- 2 1/2" x-pipe, Flowmaster 40's/turndowns.

03-14-2003, 11:02 PM	#4
429mustang Registered Member Join Date: May 2001 Location: westerville, OH USA Posts: 618	My car has the E-cam, after I put the motor back in and messed w/ the timing a little the only thing I did was set the idle around 750rpm and make sure the TPS was set (I think) around .998 THe only thing that seems weird is when I rev it quick and let off, the rpms drop quick down around 1000 and hang for a few seconds then drop back to 750. Maybe cause I haven't reset my computer, who knows. __________________ 1990 Notchback: BBK Ceramic Coated Full length headers, Dr. Gas 3"- 2 1/2" x-pipe, Flowmaster 40's/turndowns.

03-15-2003, 11:43 PM	#6
Technick Registered Member Join Date: Feb 2003 Location: Seattle, Wa. Posts: 175	The 94-95 Mustangs are real sensitive to cam changes, if it works great on a 89-93 mass air car, it may not have the same idle quality on the 94-95 5.0. I have found that sometimes the only permanent fix is to make sure the cam has at least a 114 degree lobe seperation angle. All of the Motorsport cams are 112 degree lobe seperation. The stock 94-95 has a 115 degree lobe seperation. That is why Steeda offers 2 versions of their cams. Everything the same except for the lobe seperation for the 94-95 cars. The idle and throttle responce is truely better with the 114 degree lobe seperation angle on the 94-95 cars. Also you will notice that a lot of turbo and supercharger cams (read EFI)have a 114 degree lobe seperation angle (unless it is a high rpm race engine) because there is less tendency to blow boost out the exhaust valve from the inherent overlap caused by the 112 degree cams. Now that is not to say that everyone has had a problem, it is just a real good fix for those who are tired of trying to adjust around it. __________________ No matter how much you spend, or how much you prepare, there is ALWAYS someone else faster or quicker than YOU!!!!!!!!!!

03-16-2003, 09:37 AM	#7
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	I can assure you it is not the cam. I have an E cam, cobra intake, 65mmTB, Exhast, and a supercharger. On a SPEED DENSITY car. Mine idles great, it is not the cam. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

03-14-2003, 09:46 PM	#3
dgrobels Registered Member Join Date: Nov 2002 Location: new jersey Posts: 23	you can get an idle adjuster it goes betweeen the IAC valve and lets you rasie or lower the idle speed i set mine to 850-900 RPMS

03-15-2003, 07:58 AM	#5
dgrobels Registered Member Join Date: Nov 2002 Location: new jersey Posts: 23	my does that little hang thing too ...as soon as i put on the idle adjuster it did that no big deal..... im about to put a cam in my 1991 GT here is the specs 220 226 480 480 with 1.6, I am also installing new valve springs with this cam give me some improvement on the top end? I also am putting it in becasue I run NOS and figured the stock cam was making me enough power while im on the bottle, this car is ok it goes low 13`s on the motor i am trying my hardest to go 12`s on the motor

03-16-2003, 04:02 PM	#8
Technick Registered Member Join Date: Feb 2003 Location: Seattle, Wa. Posts: 175	Yea, BUT not on a 94-95 5.0. That is the only combo that seems to have a problem with the 112 degree lobe seperation cams. I thought I made that point clear. drdo has a 94 5.0 I have put plenty of E cams in 87-93 5.0's with no problem. Cannot say the same about the 94-95 5.0. __________________ No matter how much you spend, or how much you prepare, there is ALWAYS someone else faster or quicker than YOU!!!!!!!!!!

03-19-2003, 03:06 PM	#9
drdo Registered Member Join Date: Mar 2003 Posts: 2	Thanks for everybodys help thanks

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