Has the fuel pressure regulator been checked?
Check the cam position sensor and crank pposition sensor- they will test like a tansistor, because they are a hall effect transistor. I suspect one of those two sensors may be at fault.
Thanks a lot John, but what tools are needed to test these sensors ? , any idea how can i do this myself ?
Yes, an ohm meter is all you really need. Isolate the leads tot he sensor(s) themself, it should be 3 leads, but if 2 that is okay. Essentially you check fbetween the three leads with test leads to determine which combinations give you the same reading or similar reading with one wire being common to the negative lead of the test meter. This would be the Base lead of the HE transistor. It should read anywhere from 5000 ohms to 50,000 ohms. With leads reversed, so the red test lead is now on that base lead, The resistance should be about 4 times higher to 10 times higher than the first reading. This woulld be a sensor that is "ok". If the resistance is infinite for any of the measurements, the sensor is bad. The same will be true if the resistance is the same regardless of orientation of test leads to transistor leads. The last part of the check on the 3 wire type is between the two leads that were tested in relation to the Base lead. (With a 2 lead type this is going to be the same general results) You should see about 20 ,000 to 50thousand ohms one way and then the other way should give a different resistance on the order of at least 2 (either half of the first reading, or twice that of the first reading.) If it is the same resistance both ways, replacement is a really good idea because the sensor will be prone to give spurious results, and not trip an error code in the engine computer.
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SOURCE: 1.9 Litre blows black soot and wont go over 40 kilometers an hour
you probably need a new mass air flow sensor. disconnect and drive it. I had the same problem and when I disconnected the sensor it ran good.
SOURCE: '94 S 10 Blazer V6 Vortec EFI. Fuel pressure
your statement is fuel pump work ok, have you tested for proper fuel pressure. just because the fuel pump works it could have less pressure needed to start the engine. maybe the fuel filter is plugged. start out by replacing the fuel filter, if this doesn't fix it, you need to pressure test the pump. even 10 psi reduction in pressure will allow the engine not to start.
SOURCE: 2000 ford super duty 7.3 diesel will not cold start
you need to have the engine coolant switch
checked,since the computer relies solely on sensors,the ect tells the computer how cold or hot it is so the
computer will make it a rich or lean mixture to start the engine,if it tells the
computer that it is 75 degrees the computer will lean the mixture like starting
a car in the winter without a choke.
SOURCE: 99, chrysler ,300m..1 month ago changed timing
check the timing belt!! may have been put on to loose or to tight,
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