Rev limiter or VSS, what is causing this problem!!!

moponys · 10-23-2003, 04:42 PM

With 3.73s on my car and my chip tuned for them I was able to go to 6000rpms without hitting the rev limiter, no problem.

Now I have 4.10s on, my chip is still tuned for 3.73s and the car is acting like it hits a rev limiter at 5400rpms.

How is this possible. Could this be a VSS problem. My speedo is off by possibly 15mph. I'm getting the speedo fixed today.

This is a 94 GT Convert w/aode. You can see all my mods in the sig.

Please give me some ideas cause I don't have any.

Thanks,

Tony

stang_racer20 · 10-23-2003, 09:29 PM

i didnt think the 5.0liters had a VSS sensor cause isnt that the one that mounts near the tire to tell the speed. its gotta be your chip!

moponys · 10-23-2003, 11:04 PM

I've heard from several mechanics and other members on a few boards that there is a VSS and it's possible that the speedo being off could cause this problem.

The chip could be the problem too though. But I don't know how the rev limiter setting could have lowered on it's own because I use to be able to take it up to 6000rpms but can only to to 5400 now. I guess anything's possible though.

Thanks,

Tony

Jeff Chambers · 10-24-2003, 06:55 AM

Yep, its the VSS. The VSS is actually integral with the speedometer cable, not wheel mounted. I think you're confusing that with the ABS sensor. You'll need to have your chip reprogrammed for the gear change. You could get a Bauminator which I believe gives you control over the gearing input so that you won't have to have the chip reprogrammed every time you change gears.

moponys · 10-24-2003, 12:22 PM

The speedo should be working later today...

I won't be able to get the chip reburned for probably a month so I'm hoping that fixing the speedo made it at least a little better.

thanks,

Tony

moponys · 10-27-2003, 11:31 PM

I got the speedo corrected today and it didn't help any. I guess I have to re-schedule time with the tuner and have the shift points and rev limiter checked. This is driving me crazy.

moponys · 10-28-2003, 12:49 AM

Could it just be that my stock tach is way off???

My 10/11/03 dyno printout shows peak power at 5800rpms. I can only get to 5400rpms when driving on the street.

10-23-2003, 04:42 PM	#1
moponys Registered Member Join Date: May 2001 Location: Antioch, CA 94521 Posts: 181	Rev limiter or VSS, what is causing this problem!!! With 3.73s on my car and my chip tuned for them I was able to go to 6000rpms without hitting the rev limiter, no problem. Now I have 4.10s on, my chip is still tuned for 3.73s and the car is acting like it hits a rev limiter at 5400rpms. How is this possible. Could this be a VSS problem. My speedo is off by possibly 15mph. I'm getting the speedo fixed today. This is a 94 GT Convert w/aode. You can see all my mods in the sig. Please give me some ideas cause I don't have any. Thanks, Tony __________________ N/A 94 GT vert w/aode...12.19 @110 w1.67 60' Some bolt ons

10-23-2003, 09:29 PM	#2
stang_racer20 Registered Member Join Date: Jun 2003 Location: Wisconsin Posts: 348	i didnt think the 5.0liters had a VSS sensor cause isnt that the one that mounts near the tire to tell the speed. its gotta be your chip! __________________ 92 Mustang GT, 347 Stroker(Forged Steel Crank/Rods-Balanced, Forged Aluminum Dished Pistons), Trick Flow Track Heat Intake, Trick Flow Twisted Wedge Heads w/ Stage 3 port/polish, 80mm C&L MAF, FMS 30# Inj., BBK AFPR, Trick Flow Stage 2 Cam, Trick Flow 1.6R Rockers, BBK E.L. Headers, Flowmaster Cat-Back, MAC CAI, FMS Pulleys, Griffin Alum. Radiator, MSD Pro-Billet Distributor; AOD, Dynamic 3300 Lockup Converter, B & M Super Cooler, B&M Ratchet Shifter; 3:73 gears.

10-23-2003, 11:04 PM	#3
moponys Registered Member Join Date: May 2001 Location: Antioch, CA 94521 Posts: 181	I've heard from several mechanics and other members on a few boards that there is a VSS and it's possible that the speedo being off could cause this problem. The chip could be the problem too though. But I don't know how the rev limiter setting could have lowered on it's own because I use to be able to take it up to 6000rpms but can only to to 5400 now. I guess anything's possible though. Thanks, Tony __________________ N/A 94 GT vert w/aode...12.19 @110 w1.67 60' Some bolt ons

10-24-2003, 06:55 AM	#4
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Yep, its the VSS. The VSS is actually integral with the speedometer cable, not wheel mounted. I think you're confusing that with the ABS sensor. You'll need to have your chip reprogrammed for the gear change. You could get a Bauminator which I believe gives you control over the gearing input so that you won't have to have the chip reprogrammed every time you change gears. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

10-24-2003, 12:22 PM	#5
moponys Registered Member Join Date: May 2001 Location: Antioch, CA 94521 Posts: 181	The speedo should be working later today... I won't be able to get the chip reburned for probably a month so I'm hoping that fixing the speedo made it at least a little better. thanks, Tony __________________ N/A 94 GT vert w/aode...12.19 @110 w1.67 60' Some bolt ons

10-27-2003, 11:31 PM	#6
moponys Registered Member Join Date: May 2001 Location: Antioch, CA 94521 Posts: 181	I got the speedo corrected today and it didn't help any. I guess I have to re-schedule time with the tuner and have the shift points and rev limiter checked. This is driving me crazy. __________________ N/A 94 GT vert w/aode...12.19 @110 w1.67 60' Some bolt ons

10-28-2003, 12:49 AM	#7
moponys Registered Member Join Date: May 2001 Location: Antioch, CA 94521 Posts: 181	Could it just be that my stock tach is way off??? My 10/11/03 dyno printout shows peak power at 5800rpms. I can only get to 5400rpms when driving on the street. __________________ N/A 94 GT vert w/aode...12.19 @110 w1.67 60' Some bolt ons

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