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Title: 1.8Т Rough idle and hard hot start Post by: marto7 on April 26, 2023, 08:16:33 AM The car is Audi A4 B7 1.8t with K04-064 turbo. The problem came from one month maybe. The car sometimes is hard starting i need to hold the starter for 2-3 seconds. Its not happens always, but happens mostly on hot engine. The other problem is the car has rought idle, again only sometimes not always. Nothing is changed on the setup in last 2-3 years nad the car before few months was totally fine. First i read the car and i had 3 faults for Misfire on Cylinder 1 and too rich micture. Cleared the codes, than after few days i get only Too rich fault. Today i replaced the sparks with new one but problems are still there. Im posting pictures of the fault codes and one log that has a lot of data on it - MAF, boost, AFR, retards and almost every important thing recorded on 3rd gear full throttle. Already checked the compression of the Engine and its fine and all cylinders same, samo values as last time i measured compression before 2-3 years.
Title: Re: 1.8Т Rough idle and hard hot start Post by: Terror_Flynn on April 27, 2023, 12:02:16 AM Maybe..
Fuelpump? Crank-sensor? Coils? Title: Re: 1.8Т Rough idle and hard hot start Post by: marto7 on April 27, 2023, 05:38:58 AM Car has also LPG installed. Tried it ot LPG instead of petrol and it continues same, so i think it isnt fuel pump.
Crank-sensor is replaced between 2-3 years. How can i check it ? If its coils how can i check them ? Wouldnt i see misfires on the log if some coil is faulty ? Title: Re: 1.8Т Rough idle and hard hot start Post by: aef on April 27, 2023, 12:18:02 PM check fuel trims
pressure test and or smoke test Title: Re: 1.8Т Rough idle and hard hot start Post by: marto7 on April 27, 2023, 02:39:01 PM Yes, my friend just adviced me to do a smoke test, which i will make these days, when i have time.
Fuel trims on Channel 32 ? |