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Topic: 86 5.0 running ruff. (Read 882 times) previous topic - next topic

86 5.0 running ruff.

I gots a 86 sitting, and it is running really rough, about 7-10 mpg city, 14 max hiway. Thinking o2's, but I dont wanna spring for em till I know what the problem is.

I know its getting pleanty of gas, as a matter of fact, it leaves a black stain on the ground anywhere it is parked running. Jet black exhaust, and it isnt getting any better. I know the timing is off on it, but that isnt the whole problem. It did this before it sat for the last year, and before I pulled distributor out to test the one out of my crown vic in it.

But yeah, really really rich, jet black exaust and bad(horrable) mpg. It acts like my dads motor cycle does when you have the choke on after its all warmed up.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

86 5.0 running ruff.

Reply #1 –
Quote
I know the timing is off on it, but that isnt the whole problem.
Step 1: Fix the problems that you know about.
Death awaits you all with nasty, big, pointy teeth.

1988 5.0 Bird, mostly stock, partly not, now gone to T-Bird heaven.
1990 Volvo 740GL. 114 tire-shredding horsies, baby!

86 5.0 running ruff.

Reply #2 –
Codes!

86 5.0 running ruff.

Reply #3 –
Leaky injectors maybe?
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

86 5.0 running ruff.

Reply #4 –
I will pull codes and re time it, then I will let you know. Honestly I am thinking a stuck egr valve.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

86 5.0 running ruff.

Reply #5 –
EGR valve wont cause it to run rich. Sounds like a fuel pressure regulator.
It's Gumby's fault.

86 5.0 running ruff.

Reply #6 –
FPR has already been changed.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

86 5.0 running ruff.

Reply #7 –
Doesnt mean its not defective. Check it again.

Pull your spark plugs. See if they are all running pig rich, or just a few.
It's Gumby's fault.

86 5.0 running ruff.

Reply #8 –
I changed them out about a week ago, prolly 20,000 miles on them and they were black too. all 8 of them. I will pull a new one too.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

86 5.0 running ruff.

Reply #9 –
Mine does the same thing, and leaves a huge black stain. Mine was looked over at a dealer before I bought it? HMMM??
"Real cars dont power the front wheels, they lift them"
[SIGPIC][/SIGPIC]
1984 Mercury Cougar GS 5.0:cougarsmily: BBK Equal Length Shorties, BBK O/R X-Pipe, Magnaflow Magnapacks, Mustang GT Stainless Tailpipes, 18" Magnaflow Rolled Edge Tips. Turbo Coupe Hood, Mach 1 Chin Spoiler. 17"x9" Cobra R's, Falken Ziex 255/50s, and 245/45s.
1984 Ford Thunderbird 3.8L "Drag Queen"
2009 Dodge Ram 1500 Lone Star Edition 5.7L Hemi 400hp, lex DOD14M Magnaflow retro-fit ler kit

86 5.0 running ruff.

Reply #10 –
Most likely your O2's...don't be a cheap ass, replace them.  You will end up needing to either clean or replace your EGR now, I'm sure...it will be all full of carbon from running so rich.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads
 

86 5.0 running ruff.

Reply #11 –
Ok, someone educate me, Where the hell is the EGR at?
"Real cars dont power the front wheels, they lift them"
[SIGPIC][/SIGPIC]
1984 Mercury Cougar GS 5.0:cougarsmily: BBK Equal Length Shorties, BBK O/R X-Pipe, Magnaflow Magnapacks, Mustang GT Stainless Tailpipes, 18" Magnaflow Rolled Edge Tips. Turbo Coupe Hood, Mach 1 Chin Spoiler. 17"x9" Cobra R's, Falken Ziex 255/50s, and 245/45s.
1984 Ford Thunderbird 3.8L "Drag Queen"
2009 Dodge Ram 1500 Lone Star Edition 5.7L Hemi 400hp, lex DOD14M Magnaflow retro-fit ler kit