Hello all and thanks in advance. I've been searching high and low all over the internet looking for a hint as to what is causing an intermittent miss in my 89 325i. Ill start with what is happening and follow it up with what I have done so far to try to fix the problem.
PROBLEM:
During normal driving occasionally the car will have some sort of fit and miss. Sometimes it is a single miss and sometimes it will be several over a few seconds. The check engine light flashes for each miss. The car feels like its bucking if I'm accelerating and this happens. Occasionally the miss will cause the car to stall. Wet/raining days as well as lower engine speeds (below 5000 rpm) seem to be when the miss happens. This could just be nothing as its winter in the northeast, however warm/dry days are not as bad and I'm not often getting the engine speed up that high.
ADDITIONAL INFO:
The car has always had a hard time starting in the cold for the several years I've owned it (I start it at 1/4 throttle back off once it will stay running) and is currently showing the code 1261 (Fuel Pump Relay Control). I've replaced the fuel pump relay and reset the computer. The code comes back once the car is started for the first time.
WHAT I'VE DONE SO FAR:
New, spark plug wires, distributor cap and rotor, fuel injectors, fuel filter and replaced the C191 plug with a new water tight connector. I have had the DME out and I checked it for any cracked soldered connections (nothing obvious). Roughly a year ago I had the engine out, all new gaskets and had the head decked before being put back on.
Once the car is at operating temperature it runs smooth and pulls hard other than this miss which at times renders the car undriveable and a hazard to be in or near on the road. I'm sure I've left out some relevant information, but i'll try my best to get it to solve this problem. Hopefully someone has the answer!
PROBLEM:
During normal driving occasionally the car will have some sort of fit and miss. Sometimes it is a single miss and sometimes it will be several over a few seconds. The check engine light flashes for each miss. The car feels like its bucking if I'm accelerating and this happens. Occasionally the miss will cause the car to stall. Wet/raining days as well as lower engine speeds (below 5000 rpm) seem to be when the miss happens. This could just be nothing as its winter in the northeast, however warm/dry days are not as bad and I'm not often getting the engine speed up that high.
ADDITIONAL INFO:
The car has always had a hard time starting in the cold for the several years I've owned it (I start it at 1/4 throttle back off once it will stay running) and is currently showing the code 1261 (Fuel Pump Relay Control). I've replaced the fuel pump relay and reset the computer. The code comes back once the car is started for the first time.
WHAT I'VE DONE SO FAR:
New, spark plug wires, distributor cap and rotor, fuel injectors, fuel filter and replaced the C191 plug with a new water tight connector. I have had the DME out and I checked it for any cracked soldered connections (nothing obvious). Roughly a year ago I had the engine out, all new gaskets and had the head decked before being put back on.
Once the car is at operating temperature it runs smooth and pulls hard other than this miss which at times renders the car undriveable and a hazard to be in or near on the road. I'm sure I've left out some relevant information, but i'll try my best to get it to solve this problem. Hopefully someone has the answer!
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