Skip the auto shop - Our mechanics make house calls

Q: I have a b20b boosted Integra. Hesitating low oil pressure. Experiencing bad idle and backfiring. Can't drive it.

asked by on

I have a b20b turbo. Hesitating low oil pressure. Experiencing bad idle and backfiring. Can't drive it.

My car has 196000 miles.
My car has a manual transmission.

A: Hi there, thanks for your question. The rou...

Hi there, thanks for your question. The rough idle and backfiring is quite possibly linked to a bad idle air control module. As you may know, this module regulates air intake at idle status, allowing for the fuel and air to mix properly before being injected into the engine. When this is not working correctly, it will cause a rough idle and, depending on the environment conditions, could also cause backfiring.

Typically, backfiring is a result of a lean air/fuel mixture and since your motor is turbo charged, you may know that with a turbo, you are adding a substantial increase in air flow into the motor compared to that of a naturally aspirated motor. With that in mind, it is crucial to be sure the motor is also getting enough fuel to balance this out. The backfiring may also be potentially related to a timing issue as well. Again, with any forced air induction system such as a turbo or supercharger, timing also changes as you are advancing the combustion process much fast than it normally would otherwise happen. When timing is retarded too much, this can cause the lack of power or hesitation.

I would recommend having an expert from Your Mechanic come to your home or office to diagnose and repair these rough idle and backfiring issues for you.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car has an S3 flashing light and the Check Engine Light is on

Hello - the blinking S3 light and Check Engine Light is your transmission controller telling you it has a problem. The S3 light should be flashing a set number of times (1-13). The number of flashes indicates a specific problem...

Q: High and fluctuating idle. Tried some re-learn programs with no success.

A high an fluctuating idle is usually cause by a vacuum leak or stuck open EGR valve. Also on this vehicle I have seen the PCV valve broken where a failed attempt to remove it from the valve cover it...

Q: Need a new driver's side headlight.

It sounds to me like you have aftermarket HIDs, while are very popular. Personally I would recommend installing the stock factory lamps - they will last much longer and are designed to work with the vehicle. Have a mechanic from...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...