Ford Mustang Owners' Club of Finland (FMOC) ry

Eli vikavalo palaa sekalaisesti välillä viikon välillä päivän. Ei tunnu vaikuttavan toimintaan mitenkään. Leimalle kuittasin pois ja ainakaan päästöissä ei ollut mitään vaan arvot hyvät. Koodi P1443 ja "Evaporative emission control system" "Vacuun system" " Purge control solenoid or Purge control valve fault". Eili siis ilmeisesti tankin huohotus murheita. Halvin eli tankinkorkki vaihdettu mutta on kokemusta mistä kannatais nyt ettiä? Valo ei tosiaan pala kokoaikaa vaan voi olla välillä pitkäänkin pois. Onko joku "tyyppivika" mikä ensin katteltais pois?

konehuoneessa imusarjan letkussa on solenoidi, sellaisia olen vaihtanut. Sille löytyy vastusarvokin, mutta tähän hätään en sitä löydä.

Tossa ote tehdas manuaalista. En tosin saanu kuvia tohon mukaan.
EVAP control system purge control valve malfunction.

Eli pientä venttiilivikaa voipi olla ihan vaan puhistuksen tarpeessa.
Heitä S-postiosote yv:llä niin voin lähetää PDF:änä.
Toivottavasti tästä on apua.

T: Jarkki


1997 PCED OBDII-A SECTION 1A: Description and Operation
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Evaporative Emission (EVAP) Purge Flow System Monitor
The purpose of the EVAP Purge Flow System Monitor is to verify the flow of fuel vapor from the EVAP canister purge valve to the engine. The electrical function of the purge flow (PF) sensor is initially checked before the flow test can begin. Inputs from the IAT sensor, MAF sensor, TP sensor and VSS are used to enable the flow test.
Note: The flow test will not run if a PF sensor or an EVAP canister purge valve malfunction is indicated. The diagnostic trouble codes (DTCs) associated with an electrical fault of the PF sensor are P1444 (PF sensor circuit low input) and P1445 (PF sensor circuit high input). The DTC associated with an electrical fault of the EVAP canister purge valve is P0443 (EVAP canister purge valve circuit malfunction).
The flow test will detect a hose blockage or disconnection between the EVAP canister purge valve and the intake manifold. It will not detect a detached hose from either the valve to the EVAP canister or from the EVAP canister to the fuel tank.
The EVAP purge flow test will initiate when a 75% duty cycle is commanded on the EVAP canister purge valve (Item 2, Figure 11) during engine operation. At this time, the PF sensor (Item 1, Figure 11) will take a reading while fuel vapor is flowing to the engine. The EVAP canister purge valve is then commanded closed (from 75% to 0% duty cycle). A second reading will be taken by the PF sensor after a calibrated time period of no fuel vapor flow to the engine. If the PF sensor does not react as expected to the sudden lack of fuel vapor flow to the engine, the PCM generates an EVAP canister purge valve fault DTC. If the difference between the two PF sensor readings taken (flow versus no flow) is not greater than a calibrated threshold, DTC P1443 (EVAP canister purge valve malfunction) will be set.
The malfunction indicator lamp (MIL) (Item 3, Figure 11) is activated for DTCs P0433, P1443, P1444 and P1445 after two occurrences of the same fault.



Figure 11: Evaporative Emission (EVAP) Purge Flow System Monitor





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1997 PCED OBDII-A SECTION 1A: Description and Operation
Evaporative Emission (EVAP) Vapor Management Flow System Monitor
The EVAP Vapor Management Flow System Monitor is designed to verify that the EVAP canister purge valve (Item 1, Figure 12) is functioning properly and to verify the flow of fuel vapor from the EVAP canister purge valve to the engine. The electrical function of the EVAP canister purge valve is initially checked before the flow test can begin. Inputs from the ECT sensor, IAT sensor, MAF sensor and VSS are used to enable the flow test.
Note: The EVAP vapor management flow test will not run if a EVAP canister purge valve malfunction is indicated. The diagnostic trouble code (DTC) associated with an electrical fault of the EVAP canister purge valve is P0443 (EVAP system control valve circuit malfunction).
Before the flow test is performed, the PCM will calculate how much fuel vapor is present while purging under engine operation. If the amount of fuel vapor calculated is above a calibrated threshold, the PCM assumes that there must be fuel vapor flow to the engine and that the EVAP canister purge valve is functioning properly. If this condition exists, the idle speed portion of the EVAP vapor management flow test will be bypassed and the test will pass and complete.
If the amount of fuel vapor calculated is below a calibrated threshold, the idle speed portion of the EVAP vapor management flow test must be executed to verify that the EVAP canister purge valve is functioning properly. An assumption of the flow test is that regardless of the fuel vapor in the EVAP canister, some portion of the fuel vapor flow will be air. The flow test will calculate the increase in the idle air requested by the PCM when the duty cycle on the EVAP canister purge valve is reduced from 75% to 0%.
If the calculated increase in air flow exceeds a calibrated threshold, the PCM assumes the EVAP canister purge valve is functioning properly. If the calculated increase in air flow is negligible, the EVAP canister purge valve is not functioning properly. The DTC associated with this condition is P1443 (EVAP control system purge control valve malfunction).
The malfunction indicator lamp (MIL) (Item 2, Figure 12) is activated for DTCs P0443 and P1443 after two occurrences of the same fault.



Figure 12: Evaporative Emission (EVAP) Vapor Management Flow System Monitor

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