Possible to Disable Limp Mode?

tothemax

Top Post Dawg
Joined
Aug 7, 2006
Location
Nevada
TDI
TDIs: 2003 Jetta, 2016 Q5 3.0
.....

After some more digging I found some chaffed wires :(
Try to replace or repair the chaffed wires and your problems will most likely go away... I had similar issues on my Golf and it drove me crazy until I found the faulty wires... Look particularly closely at the MAP wiring close to the plug.

BTW, where did you find the chaffed wires? you stated this started when you put you SMIC.. you may have jacked up the connection going to the MAP.
 

tothemax

Top Post Dawg
Joined
Aug 7, 2006
Location
Nevada
TDI
TDIs: 2003 Jetta, 2016 Q5 3.0
Good job!! I bet that will take care of your limp mode issue...
 

davealltheway

Member
Joined
May 6, 2012
Location
Bathurst
TDI
Jetta
I am at the same point, just want to disable limp mode. I am aware its a bad idea.

Anyone know how?

One user said to tap of the ground on the MAP and ground to frame. Anyone know which pin or colour cable is ground? Do I have to remove the pin from the connector, or just cut the cable and ground it. Or do I have to splice in a cable, reground it?
Thanks!
D.
 

cleaver

Veteran Member
Joined
May 8, 2006
Location
Berwick, Nova Scotia
TDI
None - did own '01 and '02 Jetta TDI
If you are actually overboosting (do you know for sure?), then instead of disabling limp mode, you could always just sell your car for $500. That is probably what it will be worth once your turbo grenades and trashes your engine...but I digress.
 

chrisfiat

Veteran Member
Joined
Jul 14, 2006
Location
farmington nh
TDI
97 jetta
limp mode is there for a reason, it insures that you don't over boost and blow your engine, or turbo up. if you are getting MAP sensor open or short to ground code then do a resistance check on the map wires to the ecu and FIX the broken/ shorten wire "bypassing limp " won't fix a problem that is like trying to cure the symptom, not curing the illness
 

TDIJetta99

Top Post Dawg
Joined
May 17, 2005
Location
Port Jervis, New York, USA
TDI
03... Faster than yours =]
So let me get this straight here... Instead of spending the $$ to properly diagnose why your car is going into limp mode (taking it to someone who knows how to diagnose), you want to disable limp mode so it'll overboost constantly.. You'll spend a LOT more $$ fixing the car when you have to put an engine in it.. Oh wait, it'll get better.. The new engine will still go into limp mode unless you fix why it was going into limp mode to begin with... So you'll be back at square 1 with a car that's going into limp mode, but a few grand poorer from putting an engine in the car..
 

TDIJetta99

Top Post Dawg
Joined
May 17, 2005
Location
Port Jervis, New York, USA
TDI
03... Faster than yours =]
I wrote that in response to the post 3 above mine..

replacing the sensor will fix it if it's a bad sensor.. 20 vs 50 millibar off shouldn't be enough to make it do what your car is doing.. The actual reading also changes with altitude so it'll vary a bit here and there..
 

jasonTDI

TDI GURU Vendor , w/Business number
Joined
Apr 26, 2001
Location
Oregon, WI
TDI
20' RAM 3500 CCLB dually HO/Aisan. 2019 Cherokee 2.0T
What? My VCDS doesn't get a response from the controllers (mostly the engine controller) almost every time I try to use it. I haven't had a chance to look at the wiring for the MAP sensor in my Bently manual yet because I have been very busy lately.

No offense but in reading your posts for the past 2 years you REALLY shouldn't be working on your cars. Some of your ideas, fixes, reasoning and logic is really in question when it comes to these cars.
 

Chunkerz

Veteran Member
Joined
Aug 26, 2009
Location
MD
TDI
'99.5 Golf
Sorry for bumping my old thread (I came across it while searching), but yes, I agree with you. At first I was thinking about not replying, but your words really got to me and I was thinking about them all day. I just had to reply.

Like you said, I have bad ideas when it comes to these cars and that is because these cars just aren't for me. Modern cars are just too complex, and the turbo (number one thing I've always had problems with) adds one more thing to go wrong. I'm sure you're going to tell me if things are set up right it can be reliable, but you have to admit that there are more things to go wrong. Many of my poor ideas come from just jumping head first into a project after doing minimal research/planning and when I come to a problem I am an impatient moron and try to find a quick fix. My TDI used to be my only car and I needed it to be running. I would think that a project would just take a day, but I'd run into problems and try to find a quick fix so I would have a ride to work the next day. Since then I have purchased another car (1988 Porsche 944) that I bought as a project (and because it's nice and simple and somewhat easy to work on). I'm sure you're thinking to yourself that I'm just going to ruin that car as well because I am a very poor mechanic with nothing but car destroying bad ideas, but I now have two running cars so I can actually take my time and fix problems properly (like I should have done in the first place) with no stupid half ass shortcuts that inevitably lead to more problems.

I'm not trying to start fights or anything like that. I just wanted to reply and get some of these thoughts out of my head. I hope you see my reply. I'm not trying to say "screw you" or anything like that. You've actually opened my eyes to how stupid I've been with modifications, maintenance, and problem solving, so this post is mostly just to thank you :)
 
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Nutsnbolts

Vendor , w/Business number
Joined
Nov 1, 2001
Location
Weare, NH
TDI
2000 Jetta, Silver Arrow
Clunkerz:

Life is all about growth, and learning. I have to commend you for your open mindedness and introspection- many people would indeed have said "screw you", and not gone any further.

I think that if someone could take the time to explain all about the car, that it would make much more sense to you. These cars are relatively simple, once you know all of the parts involved, and their contributions to the drivability mix.

Being able to give yourself some breathing space with the other car so that you can do fixes properly and without the time crunch is huge.

Well done.

-Rich
 

Chunkerz

Veteran Member
Joined
Aug 26, 2009
Location
MD
TDI
'99.5 Golf
I didn't want to just explode and insult people because while researching fixes for problems with my 944 in the past month or so I have seen many posts like that. Usually the person yelling sounds like a complete jack ass, so I tried not to stoop to their level and replied with thought out, calm post with no name calling.

I used to do nothing but read on here about these cars and I figured I knew them pretty well, but once I got my job I had no time to read. I eventually forgot 90% of what I read, but I kept telling myself that I knew what I was doing (which was stupid). I do agree that it is true that these cars are simple if you look at it in small pieces. I was usually in a rush and looked at the whole big picture instead of each individual part that needed attention to detail (if that makes any sense? I'm not sure how else to explain it). That's when I'd have problems and look for a quick fix.

Thank you for not just saying "I agree. You're a moron and shouldn't touch anything with 4 wheels and an engine."

After my bank account recovers from making my 944 safe to drive, I plan to retire my Golf from service for a while and correct all of my careless mistakes.
 

jasonTDI

TDI GURU Vendor , w/Business number
Joined
Apr 26, 2001
Location
Oregon, WI
TDI
20' RAM 3500 CCLB dually HO/Aisan. 2019 Cherokee 2.0T
I wasn't trying to be a total d*** but I needed to intervene for your own good. Sometimes slowing down and getting the big picture is the best idea. I'm just as guilty of it sometimes as well.
 
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