Tip & How-To about 2006 Audi A8

After battery Replacement

All vehicles with Bosch Motronic fuel injection system, when starting the engine after the battery was discharged or disconnected, switch on the ignition for approx. 10 seconds and then switch it off again. This makes sure that the old adaptation

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i have 1986 porsche 944 it start and shuts of what could be the problem.


I hate to say it, but, if it starts cleanly and quickly on all cylinders its likely to be a switch/sensor/ thermoswitch etc.
Does it run cleanly?
Are the fluid levels correct?
The fuel injection has a cold start system but the ECU needs information from intake manifold, water temp and incoming air flow to maintain its running.
Get on the web and go to Porche owners forums or find your nearest (Bosch?) agent to help.
Wikepedia says there are 3 engines and they use Bosch Motronic systems. See what yours has and search for diagrams/handbooks etc on the web/ebay. There's piles of stuff out there for Bosch systems.

Nov 05, 2013 | Cars & Trucks

1 Answer

replace fuel inj 2009 lincoln ls 3.9 eng


Check this procedure about V8 3.9L Fuel Injectors - Removal & Installation
  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2. Relieve fuel system pressure.
  3. Remove or disconnect the following:
    Negative battery cable Engine appearance covers Fuel lines Fuel pressure regulator Fuel cross over elbow Fuel injector connectors Fuel injector clamping plates Fuel injectors
To install:
  1. Install or connect the following:
    Fuel injectors. Use new O-ring seals. Fuel injector clamping plates Fuel injector connectors Fuel cross over elbow Fuel pressure regulator Fuel lines Engine appearance covers Negative battery cable
  2. Start the engine and check for leaks.

  1. Before servicing the vehicle, please familiarize yourself with safety procedures.
  2. Disconnect the negative battery cable.
    CAUTION The engine appearance cover is equipped with a noise suppressor. If the noise suppressor becomes separated from the engine appearance cover it must be positioned on the intake manifold prior to installing the engine appearance cover.
  3. Remove the engine appearance cover and the noise suppressor, if detached.
  4. Remove the air cleaner outlet pipe.
  5. Release the fuel system pressure.
  6. Remove the four engine appearance cover mounting bracket nuts and the brackets.
  7. Disconnect the fuel pressure sensor electrical connector from the sensor.
  8. Disconnect the fuel pressure sensor vacuum connector from the sensor.
  9. Disconnect the eight fuel injector electrical connectors from the injectors.
  10. Disconnect the fuel temperature sensor electrical connector from the sensor.
  11. Disconnect the fuel supply tube retaining clip from the fuel injection supply manifold.
  12. Disconnect the fuel supply tube spring lock coupling.
  13. Remove the four bolts and the fuel injection supply manifold and fuel injectors as an assembly.
  14. Remove the fuel injectors from the fuel injection supply manifold.
    CAUTION Use O-ring seals that are made of special fuel-resistant material. Use of ordinary O-ring seals can cause the fuel system to leak. Do not reuse the O-ring seals.
  15. Remove and discard the 16 O-ring seals from the fuel injectors.

    zjlimited_467.jpg

    Fig. Exploded view of the fuel injector mounting-3.9L engine shown

To install:
  1. Lubricate the new fuel injector O-ring seals with clean engine oil before installing.
    CAUTION Use O-ring seals that are made of special fuel-resistant material. Use of ordinary O-rings can cause the fuel system to leak. Do not reuse the O-ring seals.
  2. Install sixteen new O-ring seals onto the fuel injectors. Lubricate the O-ring seals with clean engine oil prior to installation.
  3. Install the fuel injectors and clips onto the fuel rail.
  4. Install the fuel rail and injectors as an assembly. Tighten the fuel rail bolts to 89 inch lbs. (10 Nm).
  5. Install the remaining components in the reverse order of removal.

Keep us updated.

Jan 14, 2011 | 2002 Lincoln LS

1 Answer

engine won't start. apply ((P)) light on


Engine turns over, but will not start
  1. Check fuel level in fuel tank, add fuel if empty.
  2. Check battery condition and state of charge. If voltage and load test below specification, charge or replace battery.
  3. Check battery terminal and cable condition and tightness. Clean terminals and replace damaged, worn or corroded cables.
  4. Check fuel delivery system. If fuel is not reaching the fuel injectors, check for a loose electrical connector or defective fuse, relay or fuel pump and replace as necessary.
  5. Engine may have excessive wear or mechanical damage such as low cylinder cranking pressure, a broken camshaft drive system, insufficient valve clearance or bent valves.
  6. Check for fuel contamination such as water in the fuel. During winter months, the water may freeze and cause a fuel restriction. Adding a fuel additive may help, however the fuel system may require draining and purging with fresh fuel.
  7. Check for ignition system failure. Check for loose or shorted wires or damaged ignition system components. Check the spark plugs for excessive wear or incorrect electrode gap. If the problem is worse in wet weather, check for shorts between the spark plugs and the ignition coils.
  8. Check the engine management system for a failed sensor or control module.
Engine does not turn over when attempting to start
  1. Check the battery state of charge and condition. If the dash lights are not visible or very dim when turning the ignition key on, the battery has either failed internally or discharged, the battery cables are loose, excessively corroded or damaged, or the alternator has failed or internally shorted, discharging the battery. Charge or replace the battery, clean or replace the battery cables, and check the alternator output.
  2. Check the operation of the neutral safety switch. On automatic transmission vehicles, try starting the vehicle in both Park and Neutral. On manual transmission vehicles, depress the clutch pedal and attempt to start. On some vehicles, these switches can be adjusted. Make sure the switches or wire connectors are not loose or damaged. Replace or adjust the switches as necessary.
  3. Check the starter motor, starter solenoid or relay, and starter motor cables and wires. Check the ground from the engine to the chassis. Make sure the wires are not loose, damaged, or corroded. If battery voltage is present at the starter relay, try using a remote starter to start the vehicle for test purposes only. Replace any damaged or corroded cables, in addition to replacing any failed components.
  4. Check the engine for seizure. If the engine has not been started for a long period of time, internal parts such as the rings may have rusted to the cylinder walls. The engine may have suffered internal damage, or could be hydro-locked from ingesting water. Remove the spark plugs and carefully attempt to rotate the engine using a suitable breaker bar and socket on the crankshaft pulley. If the engine is resistant to moving, or moves slightly and then binds, do not force the engine any further before determining the problem.

Dec 07, 2010 | 2003 Lincoln LS

1 Answer

starts over will start (feathering throttle) when this is done,


PROBLEM COULD BE THE DIFFERENTIAL PRESSURE REGULATOR.AND THE POTENTIOMETER. GO TO AUTO ZONE OR ADVANCE AUTO PARTS. BUY THE FUEL INJECTION MANUAL.LOOK UP THE CIS - E MOTRONIC SYSTEMS.YOUR PROBLEM IS IN THE FUEL DIFFERENTIAL PRESSURE REGULATOR.

Jun 21, 2010 | 1993 Mercedes-Benz E-Class

1 Answer

ENGINE CUTS OUT WHEN COLD


replace the overvoltage protection relay...red top with 10a fuse in it next to the motronic behind the battery

Sep 04, 2008 | 1987 Mercedes-Benz 300-Class

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