This issue just started to occur, when I first start my car it will vibrate the entire car, similar to a miss-fire yet it is not miss-firing and is firing on all 8, when I put it in drive and start driving it will vibrate like crazy then it is perfectly fine. It will do it on a cold start with 4 hours of sitting but subsequent starts after the issue has gone away does not bring it back.
New Daily:
2011 Audi A6 Avant 3.0T prestige. 1 of 368
----FOR SALE-----
04 BMW 325xi 143k
The Fun car:
94' BMW 740i 308k miles
Fresh 72k mile engine with all new seals. True E34 Manual Trans Engine Harness. 6spd Transmission Swap, Getrag 420G. RHD LW Single Mass Flywheel. E39 M5 Clutch. E39 M5 Shifter. Factory Car Phone. Factory 6CD Changer. Factory Electric Sunshade. Not So Factory Factory Electric/Heated Rear Seats. E38 Heater Valves. E43 M5 calipers/brakes
Sold:
1996 Oldsmobile Aurora; 194k miles but with a bad paint job and dented fender resulting in a payout to buy the 740i
It could be a few things, but I will ask about the O2 sensors. When were they last changed? I had a sillier rough start issue, turned out it was my sensors. They were very new. I swapped to BOSCH and the problem was gone.
______________________________
1992 750iL
It has newer Bosch, they are a little less than a year old with about 7k miles on them.
New Daily:
2011 Audi A6 Avant 3.0T prestige. 1 of 368
----FOR SALE-----
04 BMW 325xi 143k
The Fun car:
94' BMW 740i 308k miles
Fresh 72k mile engine with all new seals. True E34 Manual Trans Engine Harness. 6spd Transmission Swap, Getrag 420G. RHD LW Single Mass Flywheel. E39 M5 Clutch. E39 M5 Shifter. Factory Car Phone. Factory 6CD Changer. Factory Electric Sunshade. Not So Factory Factory Electric/Heated Rear Seats. E38 Heater Valves. E43 M5 calipers/brakes
Sold:
1996 Oldsmobile Aurora; 194k miles but with a bad paint job and dented fender resulting in a payout to buy the 740i
maybe either not enough fuel or too much.
Try the following when the engine is cold and you have waited some hours> Switch ignition on, wait 2-3 seconds, switch off, switch on, this will start the pre-priming process for the fuel line/pump.
If that works, then your check valve on top of the fuel pump is defective and the fuel runs back into the tank till the pressure is gone in the lines between tank and fuel rail. http://www.bmwe34.net/E34main/Trouble/535ihot_start.htm
Flooded: http://www.meeknet.co.uk/E32/Flooded_M60_Start.htm
Shogun tricks and tips for the E32 series are HERE!
Unfortunately that did not temporarily solve my issue If I very lightly rev the engine at idle the vibration is the worst, but not nearly as bad as when driving through it, at about 1K then is eliminated above that then reoccurs as it revs down.
New Daily:
2011 Audi A6 Avant 3.0T prestige. 1 of 368
----FOR SALE-----
04 BMW 325xi 143k
The Fun car:
94' BMW 740i 308k miles
Fresh 72k mile engine with all new seals. True E34 Manual Trans Engine Harness. 6spd Transmission Swap, Getrag 420G. RHD LW Single Mass Flywheel. E39 M5 Clutch. E39 M5 Shifter. Factory Car Phone. Factory 6CD Changer. Factory Electric Sunshade. Not So Factory Factory Electric/Heated Rear Seats. E38 Heater Valves. E43 M5 calipers/brakes
Sold:
1996 Oldsmobile Aurora; 194k miles but with a bad paint job and dented fender resulting in a payout to buy the 740i
Do you have a diagnostic tool? Or do a stomp test to see if there are fault codes https://www.bimmerforums.com/forum/s...e-pedal-faults
Shogun tricks and tips for the E32 series are HERE!
Just checked with Carsoft and the car has no faults. Stomp test didn't bring up any either. My buddy mentioned about it possibly being engine mounts, how would I know for sure?
I doubt if it would be mounts, it would always be an issue.
______________________________
1992 750iL
New Daily:
2011 Audi A6 Avant 3.0T prestige. 1 of 368
----FOR SALE-----
04 BMW 325xi 143k
The Fun car:
94' BMW 740i 308k miles
Fresh 72k mile engine with all new seals. True E34 Manual Trans Engine Harness. 6spd Transmission Swap, Getrag 420G. RHD LW Single Mass Flywheel. E39 M5 Clutch. E39 M5 Shifter. Factory Car Phone. Factory 6CD Changer. Factory Electric Sunshade. Not So Factory Factory Electric/Heated Rear Seats. E38 Heater Valves. E43 M5 calipers/brakes
Sold:
1996 Oldsmobile Aurora; 194k miles but with a bad paint job and dented fender resulting in a payout to buy the 740i
Again, grab a used 404 DME that probably has much fewer heat cycles on it.
I started the engine with my hood open and after reinstalling covers was constantly blasted with air, did quick little rev and found my fan clutch decided to go out.
New Daily:
2011 Audi A6 Avant 3.0T prestige. 1 of 368
----FOR SALE-----
04 BMW 325xi 143k
The Fun car:
94' BMW 740i 308k miles
Fresh 72k mile engine with all new seals. True E34 Manual Trans Engine Harness. 6spd Transmission Swap, Getrag 420G. RHD LW Single Mass Flywheel. E39 M5 Clutch. E39 M5 Shifter. Factory Car Phone. Factory 6CD Changer. Factory Electric Sunshade. Not So Factory Factory Electric/Heated Rear Seats. E38 Heater Valves. E43 M5 calipers/brakes
Sold:
1996 Oldsmobile Aurora; 194k miles but with a bad paint job and dented fender resulting in a payout to buy the 740i
Scratch that, I took a look again and I somehow lost a fan fin and did not damage anything thankfully. I don't know where or when that happened being I have not heard any noises of one breaking.
New Daily:
2011 Audi A6 Avant 3.0T prestige. 1 of 368
----FOR SALE-----
04 BMW 325xi 143k
The Fun car:
94' BMW 740i 308k miles
Fresh 72k mile engine with all new seals. True E34 Manual Trans Engine Harness. 6spd Transmission Swap, Getrag 420G. RHD LW Single Mass Flywheel. E39 M5 Clutch. E39 M5 Shifter. Factory Car Phone. Factory 6CD Changer. Factory Electric Sunshade. Not So Factory Factory Electric/Heated Rear Seats. E38 Heater Valves. E43 M5 calipers/brakes
Sold:
1996 Oldsmobile Aurora; 194k miles but with a bad paint job and dented fender resulting in a payout to buy the 740i
Then you can be lucky, I have seen pics of fan fins making damage to the hood, the radiator and other parts.
Replace the fan blade and the fan clutch.
11521712110 Febi - Cooling Fan Blade; 450mm; 11 Blades abt. $45 , 11 Inch Blade; Manufacturer Body Code: E32
cooling fan clutch between $35 (no brand, Febi etc) and $210 (ZF) depending on brand and source
Fan clutch test and operation is explained here http://www.mwrench.com/Whitepapers/FanClutchtest.pdf
Last edited by shogun; 02-05-2018 at 08:24 PM.
Shogun tricks and tips for the E32 series are HERE!
Well the fan imbalance from the missing blade can certainly cause vibrations. Also may explain why its more an issue when really cold as the fan is fully engaged for a short while. You can operate without the fan blades and rely on the electrics until it gets warm out. Just avoid standing still in one spot for too long, electric fans can only do so much.
Last edited by unity; 02-14-2018 at 06:10 PM.
______________________________
1992 750iL
usually the broken fan blade should be somewhere in the engine bay, check of item 23 Engine compartment screening is missing http://www.realoem.com/bmw/enUS/show...diagId=51_7982
that is the plastic cover under the engine and seals that area where the radiator and fan is from below. If that is missing, cooling of the engine is not as designed, the engine bay is basically closed and the pusher fans blow the air around the engine and then around the transmission, so all this should be closed to have a good cooling of the drive train.
Shogun tricks and tips for the E32 series are HERE!
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