Member
I have a 2002 z3 with 2.5. The car start fine. It has Radom back fire in the intake and rough idle. Runs out good lots of power. I have changed the plugs tested coils tested the Disa and it’s working no leaks. I did a smoke test no leaks. I am stumped at this point.
P0300 RANDOM
P1349 CYL4 misfire W/ FUEL CUTOFF
P1353 CYL6 misfire W/ FUEL CUTOFF
P1351 CYL5 misfire W/ FUEL CUTOFF
P1345 CYL2 misfire W/ FUEL CUTOFF
P1343 CYL1 misfire W/ FUEL CUTOFF
P1346 CYL3 misfire W/ FUEL CUTOFF OBD2 READER
P1347 CYL3 W/ FUEL CUTOFF
Wagon meister :)
BMW Tech Expert
Would be worth testing the cam and crank position sensors too.
What type of smoke machine are you using?
Darin
Current:
16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
Past:
95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
82 528i euro Saphire Blue Met/Blue Leather RIP
79 525 euro Green/Green RIP
79 318 Silver/Black - The first one that got it all started
M-Flight Member
Member
AUTOOL Car Smoke Leak Detector Gas EVAP Fuel Pipe System Leakage Tester DC 12v
Wagon meister :)
BMW Tech Expert
Just wanted to make sure it wasn't a homemade smoke machine is all, as those can be very unreliable.
Darin
Current:
16 220i Active Tourer Platinsilver MET (C08)/Dakota Black (PDSW), P7ACA, P7LDA, P7LHA, P9BDA, 6sp Manual - Wife's new toy!
05 325it Electric Red(438)/Gray(N6TT) ZCW, ZSP 5sp Manual Back set cover, trunk mat, Euro Infra-Rot front windshield, and mud flaps! Mr. Wagon My new Winter car.
05 M3 Imolarot II(405)/Gray(N5TT) ZCW, ZPP 6sp Manual C.F. Lip, CSL diffuser, SSK, Euro Infra-Rot front windshield and a trunk liner! Mr. Go_Fast Stored for the Winter
Past:
95 318is Montreal Blue Met (297)/Beige(K1SN) RIP, killed by an Idiot.
84 M535i gray market Burgandy Rot Met/Black Leather Lowered by Intrax on bilies, poly everywhere, B&B cat back system, K&N, and a hitch! Da Beast - Still running w/400k+!
91 316i euro Tizianrot/Gray cloth - E-36 w/M-40 RIP, but great on gas! Best was 38 MPG
82 528i euro Saphire Blue Met/Blue Leather RIP
79 525 euro Green/Green RIP
79 318 Silver/Black - The first one that got it all started
M-Flight Member
Member
BMW Tech Expert
Try clearing the codes, then unplug the mass airflow sensor, and go for a drive. Do the misfire codes recur?
This will help to know whether you're dealing with a fuel mixture issue or not.
Chris Powell
Racer and Instructor since, well. decades, ok?
Master Auto Tech, owner of German Motors of Aberdeen
BMWCCA 274412
German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471
Member
I had not read this. I will try tonight.
I had replaced the MAS as it was a aftermarket one and when I unplug it the car did not miss. But the new one does the same thing. Its OEM one and New. I will try the drive unplugged today.
Member
What brand is the new MAF?
Jbird
Check fuel pressure
Member
Its OEM one and New
Member
BMW Tech Expert
Do misfire codes recur when MAF is unplugged?
Chris Powell
Racer and Instructor since, well. decades, ok?
Master Auto Tech, owner of German Motors of Aberdeen
BMWCCA 274412
German Motors is hiring ! https://www.bimmerforums.com/forum/s...1#post30831471
Posting Permissions
Reply With Quote
Bookmarks