Car jerks after driving non stop for 30 mins, Runs OK after turning it off.
What's up guys,
My problem with my 2002 Mustang is that every time after like 30-60 minutes of non stop driving, it starts to buck and jerk. The best way to describe it is if it's being choked. When starting from a cold start, it'll run fine with no trouble. Only when it has been driving for a while, this happens.
It gets to a point when I press on the gas pedal, it won't accelerate and the rpms would stay at 2000rpm. And at stops, the rpm's would bounce from 900 to 300 until dead. But if I parked and shut off the engine for a minute or so and start back up, it will drive fine again until it will jerk once more.
In short drives it'll never show, but for long drives it does. So far I have read a few forums to get something close to my experience. Hearing it could be from the mass air flow sensor and idle air control valve, to my coils and fuel filter. But i do believe its an eletrical issue. If its mechanical, this problem would stay rather than go away for a while just by turning it off briefly. So far what I have done was clean my mass air flow (It didn't show much filth but clean it anyway.) clean the throttle body and clean the idle air control valve. And the problem still persists. Recently check my codes, came back with P0135 (O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1) and pending P0174 (Fuel Injection System Too Lean Bank 2)
I replaced the O2 sensor upstream on the passenger side but no change. And along with checking codes everything was cleared but misfire.
If it is the other issues like the spark plugs, the coils or the fuel filter I'll give it a look over. Or would it be my throttle positioning system acting up? Or the PCV?
The mustang haves 175k miles on her; bought it that way. And only mod it has is a cold air intake.
Any help on this issue will be greatly appreciated. I do wish to just really enjoy the mustang on long Sunday drives without this killing my enjoyment.
Last edited by Ace; 12-20-2016 at 06:54 PM.
Reason: Copy error