Reply With QuoteIgnition problem, coil?, cam sensor? could be O2 sensor, bad maf, my guess....... fuel is there hence the rear muffler doing a popcorn impression!!
Hows your fuel economy?
p.s A single backfire can srew up you afm.
Engine cutting off????? HELP
My 1990 M20 E34 520i is behaving very stry. Two weeks ago it started cutting off when I am speeding on any gear, as soon as I reach around 5000 to 5500 RPM the engine cuts off and then picks up instantly, this could have repeated once or twice and then the RPM range would continue smoothly as is till I hit the maximum 6500 RPM and then it flickers the usual normal cut-off flicker. Occassionally when I revved the engine while standing still, it used to do the same and sometimes would back-fire.
Yesterday it cut off the same way, backfired and then BOOOOOM the rear muffler box burst and nowe I am driving a wonderfull big lawnmower (the sound is horrible and i have a lot of exhaust leaking inside the car).
Apparently the muffler box was blocked. Do you guys think it was causing the cut-off or not? Help me out please
Big, Big Time Poster
Ignition problem, coil?, cam sensor? could be O2 sensor, bad maf, my guess....... fuel is there hence the rear muffler doing a popcorn impression!!
Hows your fuel economy?
p.s A single backfire can srew up you afm.
Last edited by Ausmpower; 06-21-2006 at 03:41 AM.
BMW parts professional
Previous rides:
BMW
E12 M535i (go the dogleg!)
E28 M535i (MMM M88!)
E34 535i M
MAZDA:
RX7 S-IV T04 (440 hp ATW)
RX7 S-I 13b bridge port
RX4 13b peripheral port
Super Moderator
Does that engine have a crankshaft position sensor? If so, check that for correct installation.
Big, Big Time Poster
Cam sensor on the M20's Shogun, Mounted in the upper timing case.
Last edited by Ausmpower; 06-21-2006 at 04:49 AM. Reason: can't spell
BMW parts professional
Previous rides:
BMW
E12 M535i (go the dogleg!)
E28 M535i (MMM M88!)
E34 535i M
MAZDA:
RX7 S-IV T04 (440 hp ATW)
RX7 S-I 13b bridge port
RX4 13b peripheral port
im haveing the same problem with my 1990 535i. not backfireing, but the random cut-off/flickering happens. i checked the CEL codes and i got 1263 which was the purge valve. nobody seems to know aht it is/ what it does.
you may have a differant problem and thats a bummer abuot your exhost.
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