2000 GT Strong exhaust smell possibly really rich but no codes

79pace

something stupid will fall out of my mouth
Founding Member
Jul 21, 2000
184
29
38
48
Tulsa, OK
www.carbdford.com
Some background. We did an engine swap on this car. It had a locked up motor so we put one from a 2002 in it. We used most all of the wiring and sensors off the 2000 and we do have the orange top injectors on it not the pink ones (the 2002 had orange). We did have to use the MAF from the 2002 since the 2000 did not have one with it when we got it. We put new chains and tensioners on it but otherwise we dropped it in stock. We added a off road X pipe to it which could be a contributor to our issue.

I am still hearing a small ticking on the passenger side bank almost like a clunking sound from what seems like inside the motor but so far it has not gotten any worse and I did put some seafaom in the oil to make sure a lifter wasnt sticking or anything like that. However the car seems rich, takes an extra crank to fire like its struggling to hit and the exhaust smell is bad. Like make your clothes stink bag and you can see the white smoke out of both sides of the back. It has zero codes being pulled and yes I have a code scanner. I am getting nothing. I have a blue tooth OBDII adapter I use in my truck with the Torque pro App but iit really does not pull much data out of this car. My old truck (2006) would pull data for each COP and have tones of sensor tests. This one does not give me much and fails a couple of them but does not say what they are. Is the computer just not new enough or do we have a bigger problem? I am suspecting the Fuel Pressure regulator may be bad but I dont want to just throw parts at it. I had another TPS so we threw it on and nothing changed. I was able to look at the O/2 data on the Torque app and all 4 looked basically the same with a curve that was going up and then back down over and over. No idea what that means but I assume they are working since it was at least getting data from them. What should we check next? I looked around and did not see any vacuum leaks and everything was plugged in and when I pulled the one off the FPR it had good vacuum at that port. Just looking for things to check or to do some self diagnosis before we buy parts. Just odd that it has no codes and runs descent when you drive it. No real symptoms of a problem over all. Once it did stumble and puff a lot of white smoke and barely re started but 30 minutes later it ran fine again. Oh and all the injectors sound good on the stethascope. All clicking like they should
 
  • Sponsors(?)


wmburns

SN Certified Technician
Aug 14, 2009
5,825
501
194
Houston Texas
Let me ask you. What color injectors originally came with your 2000 GT? In my 2000 GT the injectors are YELLOW.

To me it's not a surprise that your 2000 GT is running rich when larger injectors that what the PCM is expecting have been used without a tune.

While it's true that a 2000 PCM doesn't have as many PID's as what a latter model year PCM would have, I can tell you from personal experience that a 2000 PCM will most certainly report:
  • MAF flow
  • Fuel Pressure
  • Long term fuel trims (LTFT) and short term fuel trims (STFT).
  • misfire data from the ODB2 mode6 data.
  • O2 sensor output.
 

79pace

something stupid will fall out of my mouth
Founding Member
Jul 21, 2000
184
29
38
48
Tulsa, OK
www.carbdford.com
Yellow is orange. They are 19# stock injectors from this car. They are not larger injectors. Orange tops are stock on 2000GT. If you had yellow they were just a lighter shade of orange but they were 19# injectors. A guy locally has another FPR and MAF we are going to try on it to see if it changes anything.
 

79pace

something stupid will fall out of my mouth
Founding Member
Jul 21, 2000
184
29
38
48
Tulsa, OK
www.carbdford.com
Any more ideas from anyone? We replaced the MAF with one from another 2000gt and also the FPR. I have a EGR controller and MAP also laying around we can try. Car seems to mostly run fine. I feel like it struggles on startup slightly and this is what it looks like idling. Just really strong exhaust smell. Could the catless X pipe be the issue? We do not have a tuner for this car so the rear O2's are functioning however we do not have any codes or check engine lights.
1587577794168.png
 

wmburns

SN Certified Technician
Aug 14, 2009
5,825
501
194
Houston Texas
We replaced the MAF with one from another 2000gt and also the FPR.
There really are a ton of "possible" items that could cause a rich condition. One that also comes to mind is an exhaust leak.

But instead of replacing parts consider testing more. Do you know if:
  • the O2 sensors are switching rich and lean?
  • what are LTFT and STFT doing.
  • is fuel pressure stable?
  • how many misfires?
  • If monitoring the O2 sensors do they respond IF brake clean is sprayed into the intake air stream do the O2 sensors respond by going rich? If an air leak is created to the O2 sensors respond by going lean?
 
Thread starter Similar threads Forum Replies Date
R 2000 mustang gt pro charger help 1996 - 2004 SN95 Mustang -General/Talk- 1
9 For Sale For Sale - 1996 Mystic - #1985/2000 SN95 Mustangs For Sale (1994-04) 0
F 2000 V/6 Convert DEAD! SN95 V6 Mustang Tech 6
H 2000 mustang gt should I supercharge 1996 - 2004 SN95 Mustang -General/Talk- 4
G 2000 gt 4.6L generator not charging 1996 - 2004 SN95 Mustang -General/Talk- 1
R New member 2000 Mustang,looking for guidance. The Welcome Wagon 3
M For Sale FS: 2000 Mustang GT Track Car / 62k Miles / 5k on Motor / Full Roll Cage / California / $5,000 OBO SN95 Mustangs For Sale (1994-04) 0
V Digital Tuning 2000 V-6 Convertible automatic SN95 V6 Mustang Tech 4
S 2000 3.8l lower intake 1996 - 2004 SN95 Mustang -General/Talk- 0
R For Sale 2000 Mustang Turbo 6 speed SN95 Mustangs For Sale (1994-04) 1
F 2000 Mustang V/6 Standard Amp 1996 - 2004 SN95 Mustang -General/Talk- 3
T_Roberts Radiator Hoses and Pulleys on a 2000 v6 Mustang 1996 - 2004 SN95 Mustang -General/Talk- 0
Kylor Need help pricing 2000 Roush Stage 2 What is it Worth?!?!? 12
J 2000 GT Idle/Running Issues SN95 4.6L Mustang Tech 6
M WTB/Trade Looking for 2000-2004 Salvage GT SN95 Mustangs For Sale (1994-04) 0
Misti 2000 Ford Mustang GT 4.6 - Rear Differential 1996 - 2004 SN95 Mustang -General/Talk- 12
M 2000 S281SC 1996 - 2004 SN95 Mustang -General/Talk- 0
F 2000 gt say for 7 years won’t start 1996 - 2004 SN95 Mustang -General/Talk- 3
ryansgts 2000 gt e85 conversion? 1996 - 2004 SN95 Mustang -General/Talk- 0
N Fuel issue 2000 v6 SN95 V6 Mustang Tech 2
P SOLD PAXTON NOVI 2000 SUPERCHARGER KIT WITH 10 RIB RENEGADE BRACKET & ANDERSON POWER PIPE / FILTER Engine and Power Adder 7
P For Sale PAXTON NOVI 2000 SUPERCHARGER KIT WITH 10 RIB RENEGADE BRACKET & ANDERSON POWER PIPE / FILTER Engine and Power Adder 0
2 2000 gt engine ID sticker help 1996 - 2004 SN95 Mustang -General/Talk- 2
Misti 2000 Ford Mustang Gt 4.6 - Waterpump 1996 - 2004 SN95 Mustang -General/Talk- 4
W Engine 2000 ford mustang gt SN95 4.6L Mustang Tech 2
Misti 2000 Ford Mustang Gt 4.6 1996 - 2004 SN95 Mustang -General/Talk- 2
L 2000 GT Head Gasket - Leaking Coolant; mileage = 71,000ish 1996 - 2004 SN95 Mustang -General/Talk- 1
nathanruschill 2000 Mustang Gt auto starting issue!! SN95 4.6L Mustang Tech 3
S 2000 Mustang V6 wont start SN95 V6 Mustang Tech 1
C 2000 shell but insides are all 1995 gt....need help 1994 - 1995 Specific Tech 4
S Looking for all things great! 2000 Mustang Gt (Raush w/o the supercharger) for now. SN95 4.6L Mustang Tech 0
T Electrical 2000 3.8 weird ignition issue SN95 V6 Mustang Tech 2
F What in the world? What differential do I have. 2000 Saleen S-281 SC 1996 - 2004 SN95 Mustang -General/Talk- 0
S 2000 Mustang GT surging idle/cruising SN95 4.6L Mustang Tech 3
Brads2000 Need help, 2000 3.8 sputtering The Welcome Wagon 3
S Engine 2000 3.8 Engine Swap to 94 SC! SN95 V6 Mustang Tech 5
C Gauges on 2000 gt slow to work after starting 1996 - 2004 SN95 Mustang -General/Talk- 6
O Questions about 2000 Mustang The Welcome Wagon 0
V Drivetrain Adjusting Shift points 2000 V-6 automatic SN95 V6 Mustang Tech 0
V WTB/Trade WTB 2000 Mustang V-6 Convertible front seat upholstery Parchment Interior Exterior Parts 1
V WTB/Trade WTB 2000 Mustang V6 tail light Interior Exterior Parts 0
D Swap 2000 4.6 3v with a 2007 4.6 3v 1996 - 2004 SN95 Mustang -General/Talk- 1
B 2000 GT Muffler Replacement SN95 4.6L Mustang Tech 0
2 2000 Mustang GT Exhaust Question? 1996 - 2004 SN95 Mustang -General/Talk- 4
A 2000 mustang issues 1996 - 2004 SN95 Mustang -General/Talk- 6
C Need a little advice on 2000 3.8 to 5.0 swap. 1996 - 2004 SN95 Mustang -General/Talk- 7
D 2000 Gt, Passenger Window not working- 1996 - 2004 SN95 Mustang -General/Talk- 3
S Novi 2000 self rebuild? 1996 - 2004 SN95 Mustang -General/Talk- 0
S Paxton Novi 2000 1996 - 2004 SN95 Mustang -General/Talk- 0
2 2000 v6 standard 1996 - 2004 SN95 Mustang -General/Talk- 5
Similar threads