WILL FAULTY FUEL INJECTOR FLOOD A SPARK PLUG CAUSING IT TO MISFIRE ON A 1998 VOLVO S70
Asked by raybob0491 Feb 14, 2014 at 12:31 AM about the 1998 Volvo S70
Question type: Maintenance & Repair
I'M CONSIDERING BUYING A 1998 VOLVO S70. IT HAS 3 CODES: P0300, P0303 & P0304. I'VE REPLACE SPARK PLUG IN # 3 & #4 CYLINDERS AND IT IS STILL MISFIRING AT 2000 RPMS AND LOWER. IT RUNS FINE ABOVE 2000 RPM'S. IT'S FIRING FINE AT IDLE SPEED; SO I DON'T THINK IT'S THE IGNITION. IS CODE P0300 A VACCUM LEAK? OR A SENSOR PROBLEM?
6 Answers
raybob0491 answered 10 years ago
CYLINDER 3 & 4 ARE MISFIRING AND THE OLD SPARK PLUGS DID LOOK WET AND SMELLED LIKE GASOLINE. IF THE INJECTORS ARE LEAKING; WOULD THE CAR STILL RUN SMOOTH ABOVE 2000 RPMS?
Christopher answered 10 years ago
Most 1998's have a cap and rotor. They are probably shot. Remove spark plug wires from engine, inspect them, replace if they have never been replaced. Use Volvo OEM (Bougicord brand) ONLY. Make sure wires are not soaked in oil. If they are, change your oil cap seal. Replace spark plugs with OEM Volvo plugs ONLY.
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Guru9D4796 answered 4 years ago
I have a. Vovlo V70 AWD T5 1998 with 204,000 miles in great condition and all everything is working as it should. I was told by a mechanic that cycliner one has no fire or spark in it. And the engine light blinks when the accelerate on incline or hills do you have any advice on what should do?
