Skip the auto shop - Our mechanics make house calls

Q: Rich run, bad start, sometimes white smoke

asked by on

Hi, i have deleted DPF and EGR (EGR blank plated and disabled by ecu) after all this problems came. engine rebuild for excessive oil consumption. Car starts bad, sometime smokes white not huge. small black smoke every acceleration. transmission jerking during up and down shift from 1-2-3 and 3-2-1. what can be the reason of problem.

when the car diaqnosed by star diagnostic tool it showed that everything is ok but MASS Air Flow sensor is calculating less air. no error code.

My car has 150000 miles.
My car has an automatic transmission.

A: The white smoke is a bit worrisome - usuall...

The white smoke is a bit worrisome - usually an indicator of a blown headgasket, which will also cause rough running, especially at low speeds from a compression imbalance. The throttle position sensor may also be sending "off" signals to engine management, resulting in a bit of a rich mix, and harsher shifting.

To avoid any unnecessary repairs, I would recommend having a certified technician, like one from YourMechanic, diagnose your shaking/vibrating condition to confirm there is a problem, get an accurate assessment of damage and cost estimate for repairs. YourMechanic can dispatch a mobile, professional mechanic to your location for this repair.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Intermittent misfire that sets a random misfire code and three injector circuit failure codes.

Hello. Intermittent and random misfires can be caused by many things. If all of those components check out, it may be possible that one of the fuel injectors is dirty or clogged, and is not delivering fuel properly. It may...

Q: Trunk won't lock

Hello. When you say the trunk won't lock, I am assuming that the trunk lid will latch closed but you are able to open the trunk after remotely locking the car. If your car is equipped with keyless ignition, be...

Q: A drunk guy Ploughed into our family car.

You may have frame damage that would total the car. You should have your vehicle completely inspected and checked by a professional. If you want to try to get this fixed, consider YourMechanic, as a certified technician can perform a...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.