Rev Limiter in Drive? - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Pontiac When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 09-11-2010, 03:46 PM   #11
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

The problem is not the computer, but the signals it'* getting. Check the shift sensor on top of the transmission.
Danthurs is offline   Reply With Quote
Old 09-11-2010, 04:26 PM   #12
Junior Member
Thread Starter
 
Join Date: Sep 2010
Location: California
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
PatT is on a distinguished road
Default

Thank You Dan,

Considering that the problem is not apparent in first gear, I agree with your diagnosis. I am also suspicious that your original suggestion of the neutral safety switch might still be suspect. My examination of this produced some results I did not expect. Eg; in my day, these were simply "on or off". Now, I see that each gear selected can be an indication from the position of the neutral safety switch on some cars. If first is working correctly but 2,3 and 4 are being confused with neutral instead of grouped with first, this could possibly explain first gear working correctly and the others failing (as could the trans switch). I will not get a chance to look this over again until sometime on Monday. I want to take a moment to express my thanks for your input, and I hope that you will follow this thread until I (or more appropriately "we") have it beat. I will run some tests on Monday. Have a nice weekend. Best Regards....Pat
PatT is offline   Reply With Quote
Old 09-11-2010, 04:28 PM   #13
Retired Senior Admin

Expert Gearhead
 
Danthurs's Avatar
 
Join Date: May 2006
Location: Sheboygan Wisconsin
Posts: 29,661
Thanks: 0
Thanked 16 Times in 13 Posts
Danthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to allDanthurs is a name known to all
Default

We try to watch threads close and will make sure we get this figuered out. Chances are the gear switch is out of adjustment and indicating nutral when in fact it is in gear.
Danthurs is offline   Reply With Quote
Old 09-11-2010, 06:46 PM   #14
Senior Member
True Car Nut
 
Jonpro03's Avatar
 
Join Date: Jul 2010
Location: Danville, Illinois
Posts: 2,469
Thanks: 0
Thanked 0 Times in 0 Posts
Jonpro03 is on a distinguished road
Default

Here are the pins to check for continuity or signal to the ecm.

Pin C2 vehicle speed sensor Purple
Pin C8 vehicle speed sensor Yellow

Pin C20 2nd gear signal tan/black
Pin D6 3rd gear signal dark green
Pin D22 4th gear signal light blue

Pin D11 park/neutral switch orange/black

Would the engine rev to 5k over 10mph in neutral? If it does not, check continuity on pin c2 and c8. If it does, check c20 d6 d22 and d11
Jonpro03 is offline   Reply With Quote
Old 09-11-2010, 06:58 PM   #15
Senior Member
True Car Nut
 
raptor660's Avatar
 
Join Date: Mar 2010
Location: Eaton Rapids MI
Posts: 2,964
Thanks: 0
Thanked 0 Times in 0 Posts
raptor660 is on a distinguished road
Default

FREE expert diagnosis.. Cant beat GMForum!
This is a very interesting read
raptor660 is offline   Reply With Quote
Old 09-11-2010, 09:31 PM   #16
Senior Member
Posts like a Northstar
 
RobertISaar's Avatar
 
Join Date: Jul 2010
Location: Camden, MI
Posts: 615
Thanks: 0
Thanked 0 Times in 0 Posts
RobertISaar is on a distinguished road
Default

with the TGPs, the PNP switch is very simple, whenever in neutral or park, a circuit is completed and the pin supplyin power to it should read VERY few volts(less than 1), but in any other position, it breaks the circuit and you should see +12V on that wire.

easy test: disconnect the connector and see if it will get above those revs in any gear. when it'* disconnected, the ECM thinks it'* in drive, and shouldn't limit RPMs until the normal limited kicks in, around 6K.

if that doesn't work out, follow this diagnostic tree.

http://imgur.com/UedMG.png
RobertISaar is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Rev limiter and Speed limiter 00BLKSSEI Performance, Brainstorming & Tuning 5 12-01-2006 11:47 AM
95' SE, rev limiter? kc7oer 1992-1999 4 04-07-2006 08:13 PM
REV Limiter on N* GXP Venom Bonneville GXP/ Northstar Powered Cars 10 03-09-2006 02:09 PM
Remove Rev limiter ELMACHOGERACHO 1992-1999 13 11-29-2004 04:45 PM
rev limiter ? BUBBA General GM Chat 17 09-17-2004 04:31 PM


Tags
hesitation, rev limiter, stall

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:05 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.