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the car idles ok,when i give gas it seems to misfire-lose power.the car sits in the garage alot and not ran like it should.could it be the injectors or the fuel?the car idles ok,when i give gas it seems to misfire-lose power.the car sits in the garage alot and not ran like it should.could it be the injectors or the fuel?
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P0300 is a random or multiple cylinder misfire, and P1381 is a misfire EBCM (Electronic Brake Control Module) or PCM (Powertrain Control Module) Since you mentioned replacing fuel components, it could be as simple as a fuel injector being clogged up causing a cylinder misfire. Have you checked your fuel injectors?
Have a pressure test done on the fuel manifold to check for pump---pressure regulator and filter- The carbon on a plug indicates excess fuelling, either from bad injectors or over pressure.. Back firing in the exhaust is from unburnt fuel accumulating in the exhaust system and igniting . Misfiring is always thought to be plugs and leads but injectors and fuel pressure play an equal role in that area.
Hi, sounds like it's loading up. Recommend you check the fuel pressure regulator for a torn diaphram. Please see my tip at http://www.fixya.com/cars/r7427423-fix_poor_idle_high_idle_stalling_fuel.These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info
just because the o2 readings are off doesn't mean its bad, its a sensor and it reading something something amiss in the exhaust, you're problem lies elsewhere, could be plugs, fuel delivery , coolant in the exhaust, among a few ,check the plugs for possible misfiring, the deposit color should all be the same, light or tan deposit indicates coolant, whille the plugs are out do a compression test,
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