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Electrical Code 29 again

  • Thread starter Thread starter Creomod
  • Start date Start date Friday at 7:20 PM

Creomod

5 Year Member
Sep 14, 2018
530
43
48
San Antonio,Texas
Friday at 7:20 PM
#1
  • Friday at 7:20 PM
  • #1
Ok guys I’ve been having issue with my car,last post I posed About vacuum leaks. My car running ragged not like it used to . I’ve checked everything I even sent my ecu back to ecu exchange & the problem to me keeps communicating back to the ecu.

I start the car run it up the street come back. No cel light ,run codes & I g eat code 41 so I swapped vss sensor still doing same thing. It’s not the sensor I tested it. Removed it put a voltmeter on it spun the gear by hand & yes it generates voltage.

So I ran voltmeter to neg battery terminal the other to the vss connector (green wire) and with key on I have no voltage . I should have voltage . Removed the ecu ,checked for continuity from pin 3(ecu connector) to vss sensor connector green wire good contuity same thing from pin 6 to the neg wire on vss connector good conituty.

Voltmeter from pin to pin on vss connector no continuity so I’m assuming that it’s not a wiring issue & I’m thinking my problem is that I have no voltage to vss connector so I’m think that’s my problem. So I just need input because they did the inspect it & said that they ran it on their test car and was looking at live date stream & accurate and it passed . I keep writing to them to send it back to take another look . I know you can test the ecu it’s self from pin to pin & I belive something is wrong I’m debating to take to altex & have the guy swap my capacitors & then test it from pin to pin
 

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,920
4,041
183
Claremore, OK
Friday at 9:36 PM
#2
  • Friday at 9:36 PM
  • #2
Do you have access to another ECU?
 
Reactions: Creomod

nicholase

I lubed and pushed, until it was all the way in
May 21, 2024
638
1,138
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New York
Saturday at 12:11 AM
#3
  • Saturday at 12:11 AM
  • #3
I'm confused. Not sure year or engine or any details. But isn't a 41 an O² code? Don't see why you're replacing a VSS for an O² code.

But regarding the VSS, it generates its own signal. You won't have key on power at the VSS plug. The two wires are the sensor output and sensor ground.
 
Reactions: Creomod and General karthief

Creomod

5 Year Member
Sep 14, 2018
530
43
48
San Antonio,Texas
Monday at 7:46 AM
#4
  • Monday at 7:46 AM
  • #4
nicholase said:
I'm confused. Not sure year or engine or any details. But isn't a 41 an O² code? Don't see why you're replacing a VSS for an O² code.

But regarding the VSS, it generates its own signal. You won't have key on power at the VSS plug. The two wires are the sensor output and sensor ground.
Click to expand...
I’m sorry my mistake it’s code 29 that I keep getting
 

Creomod

5 Year Member
Sep 14, 2018
530
43
48
San Antonio,Texas
Monday at 7:47 AM
#5
  • Monday at 7:47 AM
  • #5
nicholase said:
I'm confused. Not sure year or engine or any details. But isn't a 41 an O² code? Don't see why you're replacing a VSS for an O² code.

But regarding the VSS, it generates its own signal. You won't have key on power at the VSS plug. The two wires are the sensor output and sensor ground.
Click to expand...
I’m sorry my mistake it’s code 29 that I’m getting
 
Reactions: Mcmahst

AeroCoupe

lube between the nut and the face. I know my lubes
Founding Member
Oct 28, 2001
5,920
4,041
183
Claremore, OK
Monday at 1:18 PM
#6
  • Monday at 1:18 PM
  • #6
Check the wiring for resistance.

This thread is for a 92 but good info:

M

Thread 'Code 29-Insufficient input veh speed sensor'

Jul 5, 2005
Just as thread says. Just wondering where to start, and possible problems. a diagram and location of this sensor would probably be helpful as well. Thanks in advance for any help.

Also code 81-Inlet Air Control Circuit malfunction.
a quick note: I do have a multimeter handy and access to a fluke 98 scope.
  • my$100project
  • Replies: 20
  • Forum: Fox 5.0 Mustang Tech

This thread was specifically for an 89 so the wiring diagrams are better suited for you.

Engine Thread '89 GT Dies at idle, surging around 1-1.5k while cruising'

Sep 23, 2018
Hey all,

Recently picked up an 89 GT. I've found lots of info around the forum that has helped me fix some issues so far. I'm now getting into the tougher stuff.

It usually takes two to three tries, sometimes more to start the engine, while pumping the gas, regardless of cold or warm start. Idle bounces around 5-600 rpm and will usually stall unless I run it for a min or so at 1.5k rpm before driving. During this, some popping (backfiring through the intake?) Low speed maneuvers result in the power steering stalling the engine. While driving, in any gear, I get horrible surging at around...
  • FetusLasVegas
  • Replies: 40
  • Forum: Fox 5.0 Mustang Tech
 

Creomod

5 Year Member
Sep 14, 2018
530
43
48
San Antonio,Texas
Monday at 2:37 PM
#7
  • Monday at 2:37 PM
  • #7
AeroCoupe said:
Do you have access to another ECU?
Click to expand...
No o donnot I wish I did. I had a da 1 sold it
 

Creomod

5 Year Member
Sep 14, 2018
530
43
48
San Antonio,Texas
Monday at 3:10 PM
#8
  • Monday at 3:10 PM
  • #8
Ok I tested egr it’s good now I’m at the resistance check now when I test from black /white wire from map/baro to black/white wire on the egr connector I’m getting 0.00 ohms. And when I go from same egr wire to the neg battery thermal I’m getting -0.01 what does that mean? I hmkmow I have the setting right on the voltmeter checking ohm the omega sign lowest setting I think like 20k….. actually from battery - to the map,egr,& tps it’s all -0.01 not sure if that means anything
 

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