Skip the auto shop - Our mechanics make house calls

Q: bogs down with heavy acceleration no codes all sensors read normal fuel pressure is ok.

asked by on

My husband An ase certified tech scanned the car no codes. All sensors reading normal. Fuel pressure stays consistent at 42lbs. Checked cat it's clean. When driving normal it's fine. When in heavy acceleration it bogs down. When you release the peddle and accelerat normal its fine. Any suggestions?

My car has 145000 miles.
My car has an automatic transmission.

A: This sounds like a very tricky problem to d...

This sounds like a very tricky problem to diagnose. Did you check the fuel pressure with the fuel pressure regulator disconnected? Perhaps there isn’t enough fuel pressure at full throttle, or the fuel pressure regulator leaks and floods it out at full throttle. It could also have an injector that’s sticking open. There could be a problem with the throttle body or the throttle position sensor. There is also a chance that the ECM has failed causing a flooding issue, or there is a bad ground wire for the ECM or ignition system. The only way to know for sure would be to use a more advanced scan tool and watch all the live data values while driving the car, to see whats going on with the car. You could call an independent technician, like one from YourMechanic, who can come by with a capable scan tool and help diagnose the acceleration issue you’re having.

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: Engine knocks and stalls

If the engine is knocking and performing poorly I would recommend you stop driving it and have it inspected and diagnosed by a knowledgable technician to diagnose your knocking and stalling issue. From the description you have provided, it seems...

Q: Car hesitates on startup, battery drain - 2011 Suzuki Kizashi

Check the battery drain with an amp meter, removing fuses one circuit at a time to see which circuit is draining power. Once the bad circuit is isolated, diagnose further with a wiring diagram for the components and wiring for...

Q: Hi bent valves maybe

There has been many different motors used in Mitsubishi vehicle and all but two engines bend the valves when a timing belt breaks. The possibilities of bent valves is very likely and head removal is needed to make sure unless...

Related articles

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...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.