The problem with glow plugs

[kevinbland]

Hello all, my stilo 1.9 MJT 120CV, for about a year, presents problems to the glow plugs preheating, in practice, the continental time ? the problem was have replaced all the glow plugs, but after about 2 days and rispuntata the light, I have to say that in the summer I have no problems but in the winter kind of morning ? hard starting, cos? we have intervened more? deeply and we checked the fuse:OK, the rel?:OK, at the same time? cable:OK;
at this point I would like to understand:

1) With multiecuscan diagnosis I can see what? the problem? I each time I delete the errors, but this promptly returns.

2) If I would check the voltage at the ends of the spark plugs, this is how it must be?

3) Where can I find a diagram with the specifications and the voltages of the various pins of the control unit preheating?

[cristianbomberos]

If you want my advice you should contact a car electrician in your area at least to make a diagnosis of pi? in-depth

[Backgroop]

Hello, the problems may be many, these cars lack power units pre-heat, but most of the times it is not the ecu wrapped are the connectors that attach to the glow plugs that oxidize or year-to-contact unstable, you should check the resistance of the glow plugs that needs to vary from 0.7 ohms to 1.4 ohms if one of the glow plugs and out of range you can easily replace this test you can do with glow plugs mounted, and with a tip of the multimeter with riferimemeto to the ground, while to try the power supply voltage is always with the tip negative of the multimeter with riferimemeto to ground, measure voltage at connectors attached when you start up the framework, the voltage should vary from a minimum of 11v and a maximum of 14.5 v, another test to do ? the continuity? the wiring between the glow plugs and control unit for preheating, also checked the voltage at the red wire the positive of the ecu with the bolt by 6mm.. if all ok you can proceed with the replacement of the unit is preheating.. I hope I was clear

[kevinbland]

Clear,
prover? in the week....Thanks

[cicciocar]

I backgroop for the connectors of the spark plugs, which could be the cause.

[gcmotor]

Hello to me ? happened the same problem. Replaced the glow plugs (new Bosch), replaced the ecu, plugs (new Fiat) but the problem persisted. In the end I replaced the sensor on the filter mount, diesel, what? the sensor is circular in shape where you screw the filter.
NB with the diagnosis I reported nothing.

[Backgroop]

Hello to me ? happened the same problem. Replaced the glow plugs (new Bosch), replaced the ecu, plugs (new Fiat) but the problem persisted. In the end I replaced the sensor on the filter mount, diesel, what? the sensor is circular in shape where you screw the filter.
NB with the diagnosis I reported nothing.

Gcmotor you are referring to the heater with diesel mounted on the diesel filter between the filter and the support, but on the stilo 1.9 mjet not ? expected, such as setting up.. ? happened to me as well but on older engines, jtd.. the heater is controlled by the control unit pre-heating..

124alexs
I am glad that you help, and I'm glad that you learned a method to test the glow plugs without disassembly or with rudimentary ways..

[123alexs]

Thanks Backgroop,
? a practice that use to be a p? I also, I can confirm that you gave a valuable advice, I intervened only in order to strengthen your thesis, and why? gi? the topic was very limited.

Excellent collaboration!

[gcmotor]

Sure, the car in question was a Fiat Punto 1.9 jtd

[123alexs]

Hello,
just yesterday I carried out the verification of the glow plugs, with the substitution of 1 failed.
With the tester I found three to 1.2 ohms and a marked 41ohm, outlet and powered with battery, no sign of life.
Replaced and all ok.

x gcmotor: circular sensor you are referring to, the one under the filter that checks for the presence of water in the oil?

Hello