1987 Firebird 5.0 carb engine dying at throttle

165

Asked by Jul 05, 2012 at 08:47 AM about the 1987 Pontiac Firebird

Question type: Maintenance & Repair

Hey guys/girls!

One question. Have 5.0 L 4BBl Quadrajet carb engine and it's dying or almost dying at the first seconds when I push accelerator pedal.
If i push it realy slow then it kinda dies after 1-2 seconds, if push it at medium speed, it dies at exact time when I push pedal, but if I push it "to the floor" most time everything is fine and car doesn't die. the carb is refurbished 2 weeks ago, new spark plugs & wires, new rotor and cap. Carb isn't adjusted - could it be air/fuel mixture problem? When car is standing RPM jumps up and down and sometimes when driving at idle speed RPM jumps up 200 more and then goes normal.
Any ideas?
Thanks!
Haralds

6 Answers

228,855

When replacing a carb you have to make sure to set it up properly. The float levels are adjusted, air/fuel mixture is properly set, and set the idle and fast-idle.

1 out of 1 people think this is helpful.
228,855

also check all linkage and for vacuum leaks, did you hook up all the hoses up correctly?

1 out of 1 people think this is helpful.
17,705

Tom said it. Sounds like vacuum leak. Carbs do need adjustments for a quadrajet you can adjust idle air mixture which will help and adjust the idle screw to a proper idle.

1 out of 1 people think this is helpful.
165

I didn't do anything myself. Everything was made by a carb master in service, so I didn't check after him. Will do that tomorrow. Thanks for advices! Will keep updated. Cheers!

165

Hey people! So finally there is some light at the end of the tunnel.. Went with the car to germany from my place. The car died just before the final point but I made it. Then some 8 people started to look at the carb and problems. So the problem was - there was to many fuel in carb and when I accelerated carb couldn't handle the fuel capacity. And the faul is in the mixture solenoid - rich mixture, low mixture and air/fuel mixture screws are a complete mess and are not adjusted as tey should be. Need to do that and it should run again as it should! Hope this helps somebody! Cheers!

1,525

Time to get your money back from that Carb "Master."

Your Answer

Add photo

Related Questions

Firebird

Looking for a Used Firebird in your area?

CarGurus has 789 nationwide Firebird listings starting at $1,800.

ZIP:

Search Pontiac Firebird Questions

Pontiac Firebird Experts

#1 Samuel Moore
Samuel Moore
Reputation 920
#2 dandyoun
dandyoun
Reputation 780
#3 Justin Hatfield
Justin Hatfield
Reputation 730
View All

Related Models For Sale

Used Chevrolet Camaro
132 Great Deals out of 35,283 listings starting at $1,995
Used Ford Mustang
318 Great Deals out of 45,523 listings starting at $2,000
Used Chevrolet Corvette
113 Great Deals out of 20,672 listings starting at $3,499
Used Dodge Charger
247 Great Deals out of 27,238 listings starting at $1,997
Used Ford F-150
2,404 Great Deals out of 209,425 listings starting at $895
Used Pontiac Grand Prix
21 Great Deals out of 2,855 listings starting at $1,595
Used Chevrolet Monte Carlo
8 Great Deals out of 1,409 listings starting at $2,500
Used Pontiac Grand Am
1,272 listings starting at $799

Used Cars For Sale

2002 Pontiac Firebird For Sale
137 listings starting at $5,642
2001 Pontiac Firebird For Sale
56 listings starting at $6,999
2000 Pontiac Firebird For Sale
73 listings starting at $5,995
1999 Pontiac Firebird For Sale
3 Great Deals out of 46 listings starting at $1,800
1998 Pontiac Firebird For Sale
39 listings starting at $5,908