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Car became hard to start and smelled of gas. cracked fuel
car became hard to start and smelled of gas. cracked fuel line, replaced fuel pump and cracked emissions line. this corrected the problem. however, after the second tank of gas the car almost immediat… read more
David Craig
David Craig
OWNER/MECHANIC
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Car starts and backfires out the exhaust and dies' The
car starts and backfires out the exhaust and dies' … read more
Gary
Gary
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Vocational, Technical or Trade Scho
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I have a grand Prix 2000 3.8 want start all it does is back
I have a grand Prix 2000 3.8 want start all it does is back fire change cam crank air flow senser this guess work has got expensive try use computer same thing backfire what do u think… read more
Dan
Dan
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Vocational, Technical or Trade Scho
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Pontiac Firebird: Hi, the car is actually a 1949 Chevy deluxe
Hi, the car is actually a 1949 Chevy deluxe with a 1977 pontiac firebird/trans am 400 CID in it. Here's the problem I'm having. The engine has a healthy hiccup and backfire. It's even caught fire a co… read more
kwiggins29059
kwiggins29059
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Pontiac Grand AM SE: I have a 2001 Pontiac Grand AM SE, my
I have a 2001 Pontiac Grand AM SE, my question is had to valve work, put it all back to work put it all back together the way it was supposed to be done. I tried to start it, it wants to backfire thro… read more
lightsout22
lightsout22
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pontiac grand am: 2002 pontiac grand am gt 3.4. No dtcs starts
2002 pontiac grand am gt 3.4. No dtcs starts and idles smooth has full power up to 3000 rpm then backfires violently and sometimes just dies but starts right back up. I just did new heads and all gask… read more
GM Bob
GM Bob
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i have a 2003 grand prix 3.1 liter that runs good until it
i have a 2003 grand prix 3.1 liter that runs good until it rains and then it goes crazy, backfires, boggs down and wont accelerate. Any common problems that cause this?… read more
autodoc_2000
autodoc_2000
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Vocational, Technical or Trade Scho
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I have a 1991 pontiac firebird, I just got the car and the
I have a 1991 pontiac firebird, I just got the car and the previous owner doesnt know whats wrong with it. The car had a miss in it and it was backfiring at idle when started, I found out the spark pl… read more
Eric
Eric
Retired
N/A
33,589 satisfied customers
Pontiac Firebird: My car aol not go past 15 miles per hour,
My car aol not go past 15 miles per hour, it starts up fine without any problems, but it misses and when I start driving it misses and backfired. What do u think the problem is and how can I fix it.… read more
Amedee
Amedee
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Vocational, Technical or Trade Scho
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1990 Pontiac Grand Am: mornings..several tries..car started..starter
Yes, I have a 1990 Pontiac Grand Am. In the mornings, when the car is cold, it takes several tries to try to get the car started. I have pumped the starter a couple of times, and sometimes I don't pum… read more
Stephen D
Stephen D
647 satisfied customers
1992 pontiac bonneville: spit and sputter..runs fine..accelerating
i hace a 1992 pontiac bonneville 3.8 non super charged.. when i press on the gas to acclerate it has a back fire with a spit and sputter to it... runs fine when it ldles when i start the car... Drove … read more
Virtual Wrench
Virtual Wrench
Owner of LJ Auto Repair 37 years
Associate Degree
14,398 satisfied customers
2000 Pontiac Firebird: cyl..backfiring..Codes come..miss
2000 Pontiac Firebird, 6 cyl. Am having backfiring problems. Codes come up as unspecified miss, no particular cylindar identified. Thought I got some bad gas but have run three full tanks of Chevron w… read more
car tech
car tech
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High School or GED
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97 pontiac: Car started up just fine drove..car it cranks..trans
Car started up just fine drove down the road all of a sudden backfired and would not restart. Every time I try to start the car it cranks and then backfires definitely getting fuel from what I can tel… read more
Ivan
Ivan
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Bachelor's Degree
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1996 Bonneville: new battery..car started..driven, but was not leaking
i have a 1996 Bonneville that has sat for 3 years. my brother and nephew recently installed a new battery and changed oil and the car started right up. They discovered it was losing trasmission fluid … read more
Pete
Pete
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General auto certifications
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1990 Pontiac Grand Am: the plug wires go on the coil (firing order)
Where do the plug wires go on the coil (firing order) for a 1990 Pontiac Grand Am with a 2.5L engine… read more
Ron Z.
Ron Z.
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Vocational, Technical or Trade Scho
778 satisfied customers
1997 Pontiac Grand Prix GTP: This has happened three times
Our 1997 Pontiac Grand Prix GTP has a problem of burning the electrode off of a spark plug. This has happened three times to three different spark plugs. Do you have any ideas.… read more
jazzmaster
jazzmaster
LEAD AUTO TECH
Vocational, Technical or Trade Scho
2,323 satisfied customers
1975 pontiac firebird: V8..new engine heads, cam, lifters..stalls..rev
Hello, I have a 1975 pontiac firebird with a 350 V8 pontiac engine, the engine is backfiring thru the carburetor, I have just installed new engine heads, cam, lifters, carburetor, intake manifold and … read more
rpmdiag
rpmdiag
High school
8,053 satisfied customers
305 crossfire: 1983 trans..tranny..sputter..at idle speed will run
1983 trans am 305 crossfire AT tranny. when warm after about an hour of driving it will start to cough spit and sputter and backfire. at idle speed will run just fine, under acceleration or load it wi… read more
car tech
car tech
ASE Certified Technician
High School or GED
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Meet the Experts:

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GM Tech (Cam)

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car tech

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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