Skip the auto shop - Our mechanics make house calls

Q: Popping out the exhaust and backfiring out the carb

asked by on

I had a new oil pump, new ignition control module, and new distributor put in about 3 months ago, then one morning I start the car up and begin going to school and it spits, sputters and pops out of the exhaust, I put new plugs and that didn't help it, so I had a friend come out and he drizzled a whole quart of transmission fluid down the carb while I gas it some gas, it smoothed out alittle but still is popping out the exhaust and does not want to go full throttle when I lay in to it. I rerouted the vacuum advance line to a spot what was pulling a harder vacuum and still pops out the exhaust. What could my problem or problems be?

My car has 28000 miles.
My car has an automatic transmission.

A: Adding additional vacuum to the car when it...

Adding additional vacuum to the car when it is already backfiring will usually compound the problem due to the lack of fuel supply. Backfiring is most often a result of a lean condition. Adding transmission fluid to the fuel mixture by putting it into the carb will also compound the problem of not running well as transmission fluid does not have nearly the same flash point as gas. To have the sputtering issue diagnosed, I would recommend having an expert from YourMechanic come to your home to inspect and repair this.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Overheating way to fast

Hello. If the engine overheats this fast then you should do a block test. This sounds like a blown head gasket or a cracked head. When this occurs combustion pressure enters the cooling system and causes this to occur. I...

Q: Vehicle sputters and dies

This can be caused by a number of things. If it is hard to start and acts like this if it is usually fuel related. I usually start by scanning the computer for codes. If there are codes present, then...

Q: Can a bad muffler cause a smog test to fail?

Hello. You need to see why the last smog failure was for. If the failure was excessive O2 in the exhaust test, then it could be the muffler. If it is for high HC or CO then it may be...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...