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

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・Save up to 30%

Get a quote

What others are asking

Q: 2003 Toyota Matrix and Corolla similarities

Yes, the base ones are. The fancy ones have a lot more horse power in them. But yes, it's pretty much the same as Toyota Corolla. They don't make them anymore. They made them in Cambridge Ontario and my wife...

Q: How do you know transmission going out

Hello there, many faults can cause your 2004 Honda Accord to not shift properly. The most common is low transmission fluid, shift linkage, torque converter, shift solenoid, or transmission mechanical faults. The first step a technician will take is to...

Q: Car is making a grinding/clanking sound

Hello. It sounds like you had a total transmission failure. When you have a severe internal breakage, like a sun shell or clutch pack, this will occur. The transmission will need to be disassembled and rebuilt in order to fix...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...