Fuel Delivery

Tank to injector tip — lift pump, filter, high-pressure pump, rail, regulator and injectors. On direct-injection and diesel systems the pressures involved are extreme, which makes both the diagnostic care and the failure consequences greater than on older port-injected engines.

902 کد · 22 قطعه · 15 پارامتر زنده

دنبال کردن

WhatsApp Telegram X ایمیل

قطعات

پارامترهای زنده‌ای که باید زیر نظر بگیرید

PID	پارامتر	واحد	فرمول تبدیل
01:03	Fuel system status Whether fuelling is running open-loop or closed-loop, per bank. Open loop means the module is ignoring the oxygen sensors and using a fixed map — expected when cold, a fault when warm.	—	Bit-encoded
01:06	Short term fuel trim — Bank 1 The module's immediate fuelling correction, moving constantly as the oxygen sensor switches. Positive means it is adding fuel to correct a lean condition. Read alongside long term trim — short term swinging while long term sits high tells a different story from both being high.	%	(A / 1.28) − 100
01:07	Long term fuel trim — Bank 1 The learned, persistent correction the module has settled on. This is the parameter behind P0171 and P0172, and the one worth comparing at idle versus higher load: a vacuum leak drives it strongly positive at idle and less so under load, while a fuel delivery problem does the reverse.	%	(A / 1.28) − 100
01:08	Short term fuel trim — Bank 2 Bank 2's immediate correction. Comparing the two banks is the fastest way to separate a bank-specific fault from a shared one.	%	(A / 1.28) − 100
01:09	Long term fuel trim — Bank 2 Bank 2's learned correction. Both banks drifting together points at the airflow sensor, fuel pressure or the evaporative system; one bank alone points at that bank's injectors, gasket or sensor.	%	(A / 1.28) − 100
01:0A	Fuel pressure Gauge fuel pressure, where a sensor is fitted. Coarse resolution compared with the dedicated rail pressure PIDs, and absent on many vehicles.	kPa	A × 3
01:22	Fuel rail pressure relative to manifold Rail pressure measured relative to manifold vacuum, which is what actually determines injector flow. More diagnostically meaningful than absolute pressure on port-injected engines.	kPa	0.079 × ((256 × A) + B)
01:23	Fuel rail gauge pressure Rail pressure for direct injection and diesel systems, where pressures run far higher. Compare commanded against actual across the load range — that comparison is the core of diagnosing P0087 and P0088.	kPa	10 × ((256 × A) + B)
01:2F	Fuel tank level input Fuel level as a percentage. More than a gauge reading — several monitors are inhibited when the tank is very low or very full, which is why some faults will not reproduce until the level is right.	%	A × 100 / 255
01:44	Commanded air-fuel equivalence ratio Target mixture expressed as lambda, where 1.0 is stoichiometric. Reading the target alongside what the wideband sensor actually reports is how you tell a fuelling problem from a sensor problem.	λ	((256 × A) + B) × 2 / 65536
01:51	Fuel type Declared fuel type. Worth confirming on flexible-fuel and dual-fuel vehicles, since it changes which monitors run and what mixture targets apply.	—	Enumerated
01:52	Ethanol fuel percentage Measured ethanol content. A value that never changes after refuelling with a different blend indicates the composition sensor has stopped responding.	%	A × 100 / 255
01:59	Fuel rail absolute pressure Absolute rail pressure on high-pressure systems. The parameter to watch when diagnosing the P0087 to P0094 group, and the one to compare against an independent gauge when a drifting sensor is suspected.	kPa	10 × ((256 × A) + B)
01:5D	Fuel injection timing When injection occurs relative to top dead centre. On a diesel this governs combustion noise, emissions and peak cylinder pressure, so a deviation is heard as much as measured.	°	(((256 × A) + B) / 128) − 210
01:5E	Engine fuel rate Instantaneous fuel consumption. Comparing this against expected consumption at a known load is a quick way to confirm that a suspected rich condition is real rather than inferred from trim values.	L/h	((256 × A) + B) / 20

کدهای خطا

بحرانی 2

زیاد 300

متوسط 182

کم 11

اطلاعات است، نه دستورالعمل

سایت CarGeek یک مرجع است، نه دفترچه تعمیرگاهی. صفحه‌های آن از منابع عمومی و از آنچه دیگران تجربه کرده‌اند نوشته می‌شود، نه از مستندات سرویس خودِ سازنده؛ بنابراین ممکن است برای خودروی خاص شما نادرست یا ناقص باشد. بخشی از آنچه شرح داده می‌شود خطر واقعی دارد: ولتاژ بالا، سوخت تحت فشار، انرژی ذخیره‌شده و قطعات داغ یا متحرک.

هر چیزی را که می‌خواهید بر اساس آن اقدام کنید، نخست فردی آموزش‌دیده بر پایه دستورالعمل خودِ سازنده برای خودروی شما بررسی کند. هیچ‌چیز در اینجا جایگزین آن دستورالعمل نیست.

کار روی این سیستم

نخستین کسی باشید که این را می‌نویسد

هنوز چیزی دربارهٔ این نوشته نشده است. هر چه یافته‌اید ارزش نوشتن دارد — حتی یک بن‌بست هم یک بعدازظهر را برای کسی نجات می‌دهد.

چه چیزی آن را خواندنی می‌کند:

خودرو — برند، مدل، سال و موتور. یک خرابی روی هر کدام رفتار متفاوتی دارد.
چه چیزی را اندازه گرفتید، نه فقط چه چیزی را عوض کردید.
در واقع چه چیزی آن را درست کرد — یا اینکه هیچ‌چیز درستش نکرد، که دانستنش هم ارزش دارد.

ورود یا حساب کاربری بسازید تا آنچه پیدا کرده‌اید را اضافه کنید — دربارهٔ Fuel Delivery.