Hi guys, I have a problem with my car. The car in the morning when the engine is cold idle is oscillating and I notice when I start the car under load has the injection very high. There is no error in the OBD I just notice that the fuel pressure is 300MPa and should be around 240MPa. I noticed these days that the mornings and nights are colder and that the car no longer has these symptoms when the outside air temperature is below 17șC. I think the problem is the MAP sensor or the MAF because they are the only sensors that influence the injection and that measure the intake air temperature ... What do you think? Is it the MAP (boost pressure sensor)?
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rough idle -> MAP sensor (symptoms when the outside air temperature is below 17șC)
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What kind of code reader are you using ? Some do not interrogate the ECU properly, so that could be a reason why there are no fault codes .
Also you would be probably better off getting something like opcom so you can record live data ,
First port of call would be MAF sensor, take out and spray electrical contact cleaner at the sensor .
You can take the MAP out and clean with the same product and a cotton wall bud .
.K.M.P.C.U
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Good afternoon,
It was already seen on tech2 on OPEL, on autel and now I was trying to see on elm327 ... I already cleaned the MAP sensor and had a lot of hard coal attached so I think this is it. Already cleaned the MAF with liqui molly MAF Cleaner. I have an Opcom but I can't read the ECU I think it's a problem with the OPCOM version, I can only read another car that I have astra g.
My opcom is this h**ps://www.olx.pt/anuncio/mquina-de-diagnstico-opel-v1-99-obd2-op-com-realpic18f458-opcom-IDCl44u.html
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