Cold Hard Run Problem Coluld Not Solved
Hi, (Alfa Romeo 159 1.9 JTDM 150HP-2006)
There are lots of topics about cold hard run/start problem. I read all of them, tried suggestions but my problem not solved.
A few years ago I post same topic, I thought the problem was solved, but the same problem persists.
I really need help to my problem. Thank you very much in advance.
At cold weather (about 10 degree or below), my 159 does not start/run at first or second try. it cracks hard but not run.
it always runs at 3. or 4. try. Sometimes more...
(Note: mechanics could not find the problem but they do not have a pro diagnostic tool.)
But after it start to run, I stop it that moment and try to run it again, and it always quickly/easily runs :S it only run hard if I do not use car more than 1 day at cold weathers. and if it starts to run, I stop it (to try again if it will start or not), and it always runs easily after first hard run.
At hot weather (about 20 degre or more) it always starts at first run.
I changed battery (exide agm 70 Ah), glow plugs (bosch), fuel filter, glow plug preheater relay module, I placed a non return valve to the output of fuel tank (to stop the return of fuel to the tank). And I checked glow plugs with multimeter and all glow plugs are ok. I also cheked the glow plug's sockets if there is 12V at all sockets. They were ok too...
I checked with multiecu scan diagnostic tool. there was only one error. "preheaitng control unit (feedback)-P0683" I cleaned. I guess it was a temporary error. A year ago I was replaced the glow plug preheater relay module. So I do not think that its faulty. Also after cleaning the error yestarday, today I tried to run it at this morning. problem is still going on (there is no error at diagnostic).
Today while checking it with multiecu scan, there was a different readings between injectors. (its screenshot is in attachment-please check it)
inj.correction cyl.1 = 1.66 m3/i
inj.correction cyl.2 = 0.72 m3/i
inj.correction cyl.3 = -3.23 m3/i
inj.correction cyl.4 = 0.85 m3/i
I guess there is a problem with 3. injector. I do not know what I am reading with this results but I only guess that all four injector's results must be nearly same. I am right ? :S 3th one is also negative... is there anything weird ? :/ and I am wondering if there is a relation between my problem and 3th inj. correction result (-3.23) ?
I look forward to your suggestions, thanks.