TBI SBC- CEL 33, high map voltage issues - Great Lakes 4x4. The largest offroad forum in the Midwest

Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Chevy Tech
GL4x4 Live! GL4x4 Casino

greatlakes4x4.com is the premier All Forum on the internet. Registered Users do not see the above ads.
Search
Reply
 
Thread Tools Search this Thread
Old September 25th, 2006, 11:50 AM   #1
Bones
skillicous
 
Bones's Avatar
 
Join Date: 11-06-05
Location: Dearborn Heights, MI
Posts: 11,433
iTrader: (37)
Mentioned: 1 Post(s)
Send a message via AIM to Bones
Default TBI SBC- CEL 33, high map voltage issues

My jeep is running pretty good, but once an hour or so while wheeling it will stall.

If I have the trans in D or R with my foot on the brake hard enough that the vehicle is stopped, idle will drop real low and basically stall. If it gets low and I drop the trans into N, the RPM will climb back to normal almost instantly.

The CEL will come one when the idle goes low, as code 33, high MAP voltage. When idle comes back up, the light turns off.

Replaced the MAP sensor, does the same thing no matter what. If I disconnect the map vac line and plug it, and plug the map sensor port, the same code 33 comes up, which makes since. Basically when the Jeep goes too low of an idle, it doesn't create any vaccuum and sets the code. Same thing if I plug the hose so there isn't any vaccuum at all.

Any guesses? I'm not sure if my gearing and or hyd assist has anything to do with it or not….
__________________
Inviscid Motorsports

Special Thanks and Recommendations to;
Motorcity Machines
Ironman Offroad
Branik Motorsports
Maxxis Tires

Raceline Wheels
PAC Racing Springs
Joint Clutch and Gear
Bones is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old September 25th, 2006, 07:18 PM   #2
ScOoTeR
hoo dat. wat.
 
ScOoTeR's Avatar
 
Join Date: 11-09-05
Location: Howell
Posts: 21,467
iTrader: (35)
Mentioned: 6 Post(s)
Default

Put a manual vac guage in line whith the map and see what happens when you get the error. It's probably looking at TPS and seeing there's a huge (i'm guessing) load with no throttle. Load goes away in N.
__________________
@clarkstoncracker
ScOoTeR is offline   Reply With Quote
Old September 25th, 2006, 07:57 PM   #3
Haggar
Covered in mud...
 
Haggar's Avatar
 
Join Date: 11-06-05
Location: Oxford, MI
Posts: 17,606
iTrader: (55)
Mentioned: 1 Post(s)
Default

Do you have VSS hooked up?
Haggar is offline   Reply With Quote
Old September 26th, 2006, 08:32 AM   #4
Bones
skillicous
 
Bones's Avatar
 
Join Date: 11-06-05
Location: Dearborn Heights, MI
Posts: 11,433
iTrader: (37)
Mentioned: 1 Post(s)
Send a message via AIM to Bones
Default

Quote:
Originally Posted by Haggar
Do you have VSS hooked up?
I hooked it up kast night.

Its the painless VSS with 2 white wires, neither of them marked. Does it matter which one goes to signal and which goes to ground?
__________________
Inviscid Motorsports

Special Thanks and Recommendations to;
Motorcity Machines
Ironman Offroad
Branik Motorsports
Maxxis Tires

Raceline Wheels
PAC Racing Springs
Joint Clutch and Gear
Bones is offline   Reply With Quote
Old September 26th, 2006, 09:13 AM   #5
Haggar
Covered in mud...
 
Haggar's Avatar
 
Join Date: 11-06-05
Location: Oxford, MI
Posts: 17,606
iTrader: (55)
Mentioned: 1 Post(s)
Default

Dunno. I just asked, because I know that can cause the stumble/stall when stopping.
Haggar is offline   Reply With Quote
Old September 26th, 2006, 09:34 AM   #6
Bones
skillicous
 
Bones's Avatar
 
Join Date: 11-06-05
Location: Dearborn Heights, MI
Posts: 11,433
iTrader: (37)
Mentioned: 1 Post(s)
Send a message via AIM to Bones
Default

i just called them, it doesn't matter which wire is signal and which is ground... we'll see it that helps my issues.
__________________
Inviscid Motorsports

Special Thanks and Recommendations to;
Motorcity Machines
Ironman Offroad
Branik Motorsports
Maxxis Tires

Raceline Wheels
PAC Racing Springs
Joint Clutch and Gear
Bones is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Chevy Tech

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

Forum Jump


All times are GMT -5. The time now is 12:38 PM.


Powered by: vBulletin, Copyright ©2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Page generated in 0.09079 seconds with 38 queries