I have a problem. Whenever I get on the gas, half to full throttle, from a stop or rolling slowly the car won't go. It just bogs down. I've got a new carb, and the choke isn't sticking. Does anyone know what is wrong? It's only when I'm stopped or slowly moving. I don't have vacuum advance, could that be the problem. Or is the carb too big and putting in to much gas. It keeps getting worse the more I drive it. What can I do? Is there something wrong with the my timing? PLEASE HELP

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• 87 firebird formula
• 305, 4bbl
• Edelbrock intake
• Holley 600 double pp
• MTX 4250D amp
• 2-MTX 6000 10"
• white with red int.
• Pioneer cd player
• a/c
• power windows and locks

 

Clogged catalytic converter?

 

The cat and exhaust is new

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• 87 firebird formula
• 305, 4bbl
• Edelbrock intake
• Holley 600 double pp
• MTX 4250D amp
• 2-MTX 6000 10"
• white with red int.
• Pioneer cd player
• a/c
• power windows and locks

 

Bog = lean. Whatever the problem is, it isn't too much gas.

If this is a vacuum secondary carb, get a "trick kit" which is an assortment of springs for the secondary diaphragm; try the black one first, if it works try the brown one, then go back to the black one if it bogs with the brown one.

Lack of vacuum advance will not make the car "bog", but if you have a computer-controlled distributor, the only kind wihtout vacuum advance, then it also doesn't have centrifugal advance. Total lack of advance will make it run generally sluggish all the time and seem lazy, use too much gas, and run hotter than it should especially cruising. Get the right distributor.

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"So many Mustangs, so little time..."
ICON Motorsports

 

if you get the wrong cat then it will clog up within days

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late model 91 rs, fully loaded, auto, t-tops, red leather, paint- gm red and yellow blend (light red), custom painted 16" Camaro rims
305 tbi flat base 14"x3" with K&N, hypertech chip, accel super stock plug wires, only use full synthetic oil and delco filter, 2 1/2" cat delete pipe, Edelbrock 3" cat-back
MTX sub and amp, Bose all around
vic_v8@yahoo.com
street kills: New v-6 stang, 96 v6 camaro, totally killed '86 SC Camaro (305), 91 z 28 with 305
15.854@87.57 (I think I could have it 15.5 with good tires and two more runs)
next month: rest of ultimate tbi

 

But it does NOT happen when you are at a cruising speed and gun it?



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http://www.gruveb.com/z28

 

It doesn't happen when I'm cruisin'.
Is there a way to check my catalytic converter to see if it is clogged? How much are those trick kits?

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• 87 firebird formula
• 305, 4bbl
• Edelbrock intake
• Holley 600 double pp
• MTX 4250D amp
• 2-MTX 6000 10"
• white with red int.
• Pioneer cd player
• a/c
• power windows and locks

 

How can you not get the right cat, aren't they all made the same, just different sizes.

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"Putting any amount of money into a RICE BURNER is like wiping your a$$ with a turd. "
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite

 

Man, this is really just a common problem with the 3rd gens. First off you need to check your fuel filter, then you need to check the PSI comming from your fuel pump. With the fuel pump, they die, they just dont kill over, they slowly die. I had the same problem about a year ago and vader told me to check the fuel pressure coming from my fuel pump, so i did and WHAM there was my problem. Good luck.

 

Figured it out.... It was my carb. One of the jets were clogged. Cleaned it and now It runs like it used to. I'm glad I got that fixed because it was making me really mad.

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• 87 firebird formula
• 305, 4bbl
• Edelbrock intake
• Holley 600 double pp
• MTX 4250D amp
• 2-MTX 6000 10"
• white with red int.
• Pioneer cd player
• a/c
• power windows and locks