Catalyst converter‘s Turning red hot!

2020 PP2 5.0

New Member
Mar 31, 2020
14
0
1
25
Texas
What’s going on guys! I’m currently restoring a 1994 mustang GT 5.0! The car has not been operated in eight years it was Only started time to time. Purchased the vehicle from a relative. He claims the reason he stopped driving it was because he was having loss of power when accelerating. I changed the fuel pump drained the old gas and got it running. Car responded great. Shortly after the car would not start easy, would run sluggish and the cats turned red hot! I was thinking my cats were clogged or maybe the injectors? Any help or advice would be appreciated

all I’ve done to the car as of now
Engine coolant,Thermostat,Fuel filter
Fuel pump,Air filter and battery. Will be changing the spark pugs and oil this weekend hopefully!
 
  • Sponsors(?)


74stang2togo

Oooh! CT!!!
Mod Dude
Mar 7, 2002
7,556
3,425
224
Welcome to the site, moved your thread to the correct forum from "Other Auto Tech" (that one's a black hole from which your post would've never seen light).
 
  • Agree
Reactions: General karthief

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
17,001
5,452
193
polk county florida
Is the emissions stuff still hooked up?
I would disconnect the pipes at the headers and see if it runs better.
Also make sure your fuel pressure is good.
Have you run the codes?
 

2020 PP2 5.0

New Member
Mar 31, 2020
14
0
1
25
Texas
Is the emissions stuff still hooked up?
I would disconnect the pipes at the headers and see if it runs better.
Also make sure your fuel pressure is good.
Have you run the codes?
Emissions still hooked up. No codes ran yet also no check engine light! I will try disconnecting the pipes at the headers, I’ve been getting that a lot from a few people! Thanks
 

revhead347

My mission is to out curmudgeon you
15 Year Member
Jun 14, 2004
8,184
1,086
214
40
Acworth, GA
Weather the emissions stuff is functioning or not is not likely to be the problem. It not functioning would make the cat run cold, not hot. Either the catalytic converter is clogged, or the car is running pig rich.

Kurt
 
  • Like
Reactions: Ranger

2020 PP2 5.0

New Member
Mar 31, 2020
14
0
1
25
Texas
Weather the emissions stuff is functioning or not is not likely to be the problem. It not functioning would make the cat run cold, not hot. Either the catalytic converter is clogged, or the car is running pig rich.

Kurt
Weather the emissions stuff is functioning or not is not likely to be the problem. It not functioning would make the cat run cold, not hot. Either the catalytic converter is clogged, or the car is running pig rich.

Kurt
I noticed a little bit of black smoke coming out the exhaust. so I put my hand up to it and whenever I smelled my hand I got a slight gasoline smell.
 

revhead347

My mission is to out curmudgeon you
15 Year Member
Jun 14, 2004
8,184
1,086
214
40
Acworth, GA
I noticed a little bit of black smoke coming out the exhaust. so I put my hand up to it and whenever I smelled my hand I got a slight gasoline smell.
I had something like that before. The car ran like hell. It didn't have catalytic converters, but it was getting hot enough to make the headers glow. In my case it was a bad wire on an O2 sensor. I would pull a spark plug and look at the plug.

Kurt
 

stroken94

New Member
Apr 1, 2020
4
0
1
57
Las Vegas, NV
I had this happened on my 94, 331 Stroker, the stock cats turned bright red...usually means the engine is timing is off (missing), or to much fuel going through, regardless, it usually means your cats our toast, I installed some high flow Magnaflow cats with the metallic substrate, and my cats are working fine without the red glow. Good luck
 

2020 PP2 5.0

New Member
Mar 31, 2020
14
0
1
25
Texas
I had this happened on my 94, 331 Stroker, the stock cats turned bright red...usually means the engine is timing is off (missing), or to much fuel going through, regardless, it usually means your cats our toast, I installed some high flow Magnaflow cats with the metallic substrate, and my cats are working fine without the red glow. Good luck
Thanks for the advice I will be replacing the cats and exhaust, looking into the magnaflows!
 

2020 PP2 5.0

New Member
Mar 31, 2020
14
0
1
25
Texas
I had something like that before. The car ran like hell. It didn't have catalytic converters, but it was getting hot enough to make the headers glow. In my case it was a bad wire on an O2 sensor. I would pull a spark plug and look at the plug.

Kurt
I will pull them this weekend and get back!
 

559mat

Member
Aug 13, 2019
2
1
13
26
Fresno
Hey I had the same exact thing happen to me on my 95 gt auto it turned out the distributor was bad not the cap and rotor something inside the distributor went out took me months to figure it out cheap distributor for 94 95 is on eBay for about 35 almost guarantee that’s your problem
 
  • Like
Reactions: 2020 PP2 5.0
Thread starter Similar threads Forum Replies Date
J catalyst converter question SN95 4.6L Mustang Tech 10
DD2000GT 2013 5.0 Gt O2/catalyst Emission Monitor Issues 2005 - 2014 S-197 Mustang -General/Talk- 2
Green Machine Fitch Fuel Catalyst 2005 - 2009 Specific Tech 2
R Please Help! Ideas/Tips on how to make my '93 2.3l (NA) Convertible Faster. 2.3L (N/A & Turbo) Tech 6
F 2000 V/6 Convert DEAD! SN95 V6 Mustang Tech 5
F SOLD For Sale: 84 red GT convertible 27k miles Fox Body Mustangs For Sale (1979-93) 1
B For Sale 99 - 04 Mustang H-pipe with working Cats for sale Other Classifieds 0
Drumsgtret 2008 Mustang Convertible GT- Cluster Assembly upgrade 2005 - 2009 Specific Tech 1
J Please help - 68 Convertible J-Code confirmation/value 1965 - 1973 Classic Mustangs -General/Talk- 1
D For Sale 1993 Ford Mustang LX Convertible 2.3L NE Wisconsin Fox Body Mustangs For Sale (1979-93) 0
Justin87 Torque Converter identification 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 1
V Digital Tuning 2000 V-6 Convertible automatic SN95 V6 Mustang Tech 4
D Delete 2nd Cats & Pass Inspection? 1996 - 2004 SN95 Mustang -General/Talk- 8
C Convertible windshield replacement 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 4
S 2005 convertible v6 2005 - 2014 S-197 Mustang -General/Talk- 4
R 1987 GT Convertible - Mystery plug 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
C 87 Convertible pump and cylinder replacement 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 0
J 2001 Ford Mustang Cobra SVT Convertible Fuel Smell help 1996 - 2004 SN95 Mustang -General/Talk- 2
J New '65 convertible owner The Welcome Wagon 4
gearhead77 89 (and prior) convertible sidewall speakers. Mustang Sound & Shine All 0
F What's it Worth? Red on red 1984, GT vert, 5.0, 26k miles What is it Worth?!?!? 0
K Rebuilding my 82 convertible fox body 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 0
C Progress Thread Project Low buck GT convert 1996 - 2004 SN95 Mustang -General/Talk- 5
S What's it Worth? 2007 GT Premium Modified What is it Worth?!?!? 1
M Loose driver's side glass 65 convertible 1965 - 1973 Classic Mustangs -General/Talk- 0
G 1965 mustang convertible price What is it Worth?!?!? 2
R 07 mustang gt convertible back seat delete 2005 - 2009 Specific Tech 0
K What's it Worth? 87 Fox GT What is it Worth?!?!? 11
C 2005 convertible top won’t go back up 2005 - 2014 Specific V6 Tech 0
gearhead77 Interior and Upholstery 89 GT convertible quarter window help Fox 5.0 Mustang Tech 5
Eilermoon '03 Convertible top stuck SN95 4.6L Mustang Tech 16
mustangmccance Progress Thread 89 convertible. summer driver 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 40
H 1972 convertible pre-purchase question 1965 - 1973 Classic Mustangs -General/Talk- 8
G 1965 convertible windshield upper molding 1965 - 1973 Classic Mustangs -General/Talk- 0
T Disable parking brake for convertible top 1996 - 2004 SN95 Mustang -General/Talk- 1
T Help Choosing a Torque Converter Aod 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 18
T Body Kit Fitment later fox body convertibles? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
G SOLD Convertible motor mounts Drivetrain Parts 6
R Progress Thread Just another 93 convertible project 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 25
D Need Help with wiring an 87 GT Convertible Radio Fox 5.0 Mustang Tech 30
R Fox Need advise 93 5.0 convertible prodject 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 21
H 1986 converted to 5.0 runs like sh## Fox 5.0 Mustang Tech 4
marcelo Fox Torque converter for AOD trans 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
1989FoxFan Interior and Upholstery How to replace convertible top frame rails Fox 5.0 Mustang Tech 2
1989FoxFan Interior and Upholstery Are there any good videos or guides for replacing convertible top Fox 5.0 Mustang Tech 9
1989FoxFan Electrical How to Remove Convertible top Motor? Also where is a good place to send it to be rebuilt Fox 5.0 Mustang Tech 14
S 01 v6 very dash wiring issue SN95 V6 Mustang Tech 4
H Anyone have any info on putting a 86 svo doghouse on a 93 convertible? The Welcome Wagon 0
H Anyone ever heard of putting an entire SVO front doghouse on a 93 convertible? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 56
D Selling advice for 2007 California Special Convertible What is it Worth?!?!? 1
Similar threads