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Car Forum / BMW Cars / March 2005any please provide your knowledge
Ok. I am having a terrible problem with knocking and pinging. The car runs good, but when it shifts into the next gear it has a series of knocking and pinging. When the car is cold, it seems to be fine. When it warms up is when the problem begins. It is a 93 325i with auto transmission. I have replaced the knock sensor. I checked and there are no codes on the computer. The plugs are clean. I am not too familirar with these cars yet and am in need of assistance from someone who does. With the above mentioned, can anyone help point me in a better direction? Again, when the car warms up, it seems to happen. It happens especially right after it shifts. Also, I turn on my radio and all i see is 'CODE'. How do I correct this problem? I had some work done and they had to pull out the dash. I also lost my digital clock on the 'computer' inside the car with the buttons that allow me to check range, timer, temp etc... I go to push clock and it tells me to set it, but nothing works. > Ok. I am having a terrible problem with knocking and pinging. The car runs > good, but when it shifts into the next gear it has a series of knocking and [quoted text clipped - 11 lines] > allow me to check range, timer, temp etc... I go to push clock and it tells > me to set it, but nothing works. I would suspect the ports to your EGR valve may be plugged with carbon or the EGR valve has failed. Did you dump the error codes? Your radio needs the security code re-entered. If you don't have it, take your VIN# and registration to a dealer and they can look it up. > Ok. I am having a terrible problem with knocking and pinging. The car > runs good, but when it shifts into the next gear it has a series of [quoted text clipped - 6 lines] > in a better direction? Again, when the car warms up, it seems to > happen. It happens especially right after it shifts. This may seem a bit simplistic, but, are you possibly using gas with too low an octane rating? Jeff > Also, I turn on my radio and all i see is 'CODE'. How do I correct > this problem? I had some work done and they had to pull out the dash. > I also lost my digital clock on the 'computer' inside the car with > the buttons that allow me to check range, timer, temp etc... I go to > push clock and it tells me to set it, but nothing works. I wish that was the issue. I am using 91 octane and have used the ol' fuel injector cleaner in a bottle a few times just in case. >> Ok. I am having a terrible problem with knocking and pinging. The car >> runs good, but when it shifts into the next gear it has a series of [quoted text clipped - 17 lines] >> the buttons that allow me to check range, timer, temp etc... I go to >> push clock and it tells me to set it, but nothing works. >>> Also, I turn on my radio and all i see is 'CODE'. How do I correct >>> this problem? I had some work done and they had to pull out the dash. >>> I also lost my digital clock on the 'computer' inside the car with >>> the buttons that allow me to check range, timer, temp etc... I go to >>> push clock and it tells me to set it, but nothing works. You must have had the battery disconnected during service. You need to enter the code for the radio. If you don't have it you will need to go to a BMW dealer with lots of ID and all your car information. They will give you a code as long as they believe you are the legitimate owner of the car and/or radio. The purpose of the code was to make the radio useless if stolen and therefore reduce thefts of the radio. >I wish that was the issue. I am using 91 octane and have used the ol' fuel >injector cleaner in a bottle a few times just in case. My experience with engines is that people that use high octane gas get carbon buiildups in the combustion chamber. I don't usually get involved with octane arguments, but people like the higher numbers, it makes them feel better. That's fine. But higher octane means slower flame fronts. it has nothing to do with the energy stored in the hydrocarbon itself. unless you have a high compression engine over 11:1 most people don't need high octane. That being said, your car has some carbon buildup. Once the carbon heats up it stays hotter longer than the metal beneath it. Thre are some decarbonizing chemicals out there. Like the fuel injector cleaners, some are snake oil. Octane booster from a brand name may help reduce the carbon buildup. otherwise it's off with the head. Shaw >>I wish that was the issue. I am using 91 octane and have used the ol' fuel >>injector cleaner in a bottle a few times just in case. > > My experience with engines is that people that use high octane gas get > carbon buiildups in the combustion chamber. >snip Octane booster from a brand name may help reduce the carbon > buildup. otherwise it's off with the head. > > Shaw I'm confused. Are you saying that higher octane (fuel or with additive) causes buildup or reduces it? My experience has been to just use the rating suggested by the manufacturer. Aftermarket chips and such generally require higher octane to get performance improvements as a result of remapping. My 740 runs on the suggested octane just fine. My M5 runs 94. My M3 track car does best on 94, but the engine is very much reworked. I had an 87 325is and I didn't pay much attention to performance or power, but I found that I got much better mileage using the recommended fuel than a higher octane. Just my observations. Please keep in mind that when the car is cold, it runs fine without the pinging. When it gets to operating temp, it pings like crazy when it first shifts and under load. I changed the plugs yesterday and the problem still exists. What would temperature and the pinging have in common? >>>I wish that was the issue. I am using 91 octane and have used the ol' >>>fuel injector cleaner in a bottle a few times just in case. [quoted text clipped - 21 lines] > > Just my observations. I found some coolant on two plugs. I found the problem :( > Ok. I am having a terrible problem with knocking and pinging. The car runs > good, but when it shifts into the next gear it has a series of knocking [quoted text clipped - 12 lines] > that allow me to check range, timer, temp etc... I go to push clock and it > tells me to set it, but nothing works. |
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