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

210,435

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.
210,435

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.
16,235

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!

1,495

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 817 nationwide Firebird listings starting at $3,800.

ZIP:

Search Pontiac Firebird Questions

Pontiac Firebird Experts

#1 Samuel Moore
Samuel Moore
Reputation 910
#2 dandyoun
dandyoun
Reputation 760
#3 Justin Hatfield
Justin Hatfield
Reputation 730
View All

Related Models For Sale

Used Chevrolet Camaro
660 Great Deals out of 39,410 listings starting at $2,995
Used Ford Mustang
682 Great Deals out of 38,456 listings starting at $1,963
Used Chevrolet Corvette
353 Great Deals out of 20,300 listings starting at $3,688
Used Dodge Charger
521 Great Deals out of 29,008 listings starting at $2,275
Used Pontiac Grand Prix
26 Great Deals out of 3,754 listings starting at $1,195
Used Chevrolet Monte Carlo
16 Great Deals out of 1,731 listings starting at $1,695
Used Ford F-150
3,363 Great Deals out of 205,120 listings starting at $1,273
Used Porsche 911
149 Great Deals out of 4,479 listings starting at $9,995

Used Cars For Sale

2002 Pontiac Firebird For Sale
5 Great Deals out of 127 listings starting at $6,497
2001 Pontiac Firebird For Sale
78 listings starting at $7,599
2000 Pontiac Firebird For Sale
3 Great Deals out of 86 listings starting at $3,800
1999 Pontiac Firebird For Sale
53 listings starting at $4,990
1998 Pontiac Firebird For Sale
44 listings starting at $4,999