'92 325i sputtering during takeoff...HELP!!
- Thread starter Scarface
- Start date
check your plugs and make sure your valve cover gasket isn't leaking oil into the spark plug valley.also,try some fuel injector cleaner.the design of the m50 motor puts the injector above the intake valves,and when fuel is sprayed onto a hot valve,buildup will occur rather quickly.BMW recommends injector cleaner every now and again too.
I have recently had a similar problem with my 92 325i. My car would stutter and stall while starting out quickly. Slow starts were fine and above 3000RPM the engine ran smooth, until you tried to accelerate. Then the engine would misfire and hesitate.
I have discovered that a common problem with the 1992 model year was the stationary injector coils by ZUNDSPULE were defective. A break on the secondary side of the coil caused rough idle and/or misfire under heavy engine load.
The defective coils can be identified by the date above the word "ZUNDSPULE", ie 91 M 01 year=91, month=January), any coil produced prior to this date could be defective.
You can diagnose a defective unit by removing the coil from the engine, twisting and pulling the spark plug connector (long rubber holder) and looking inside the coil for a green corrosion or broken pieces. If signs of either are present then a replacement is required $$$.
I replaced 2/6 (the others were replace sometime before I took ownership - Why?!?) which I bought from BMW. For a new BOSCH replacement I paid $130.00 CAD each.
Good Luck and I hope this cures your problems.
see Alldata, Bulletin #12 02 92 (3506)
I have discovered that a common problem with the 1992 model year was the stationary injector coils by ZUNDSPULE were defective. A break on the secondary side of the coil caused rough idle and/or misfire under heavy engine load.
The defective coils can be identified by the date above the word "ZUNDSPULE", ie 91 M 01 year=91, month=January), any coil produced prior to this date could be defective.
You can diagnose a defective unit by removing the coil from the engine, twisting and pulling the spark plug connector (long rubber holder) and looking inside the coil for a green corrosion or broken pieces. If signs of either are present then a replacement is required $$$.
I replaced 2/6 (the others were replace sometime before I took ownership - Why?!?) which I bought from BMW. For a new BOSCH replacement I paid $130.00 CAD each.
Good Luck and I hope this cures your problems.
see Alldata, Bulletin #12 02 92 (3506)
Sorry Scarface if I scared you. The replacement of my coils ONLY happened after an injector treatment, 6 new spark plugs, and a fuel filter replacement. The filter was a stab in the dark. The car felt like it wasn't recieving enough fuel (plugged) or the pump was dead (side note: try not to let your fuel run below 1/4 tank, as it is used to cool the pump). Then, and only then, did I preceed in buying the coils.
Sorry again for the heart attack.
Sorry again for the heart attack.
