From my mechanic, any suggestions?
Basic Problem: Rough Idiling, Misfire on cylinders 1,3 6 with codes to say same.
Hello Tom, it's really not playing nice. We have checked damn near every component. Compression, Coils, Plugs, even did a leak down on the injectors, Fuel Pressure, Exhaust Back Pressure. The Misfires are on 1,3 and 6. We swapped coils and plugs from those holes to the sister holes and misfire stayed in the original location. Compression is within specs 130-140psi. It had 9 codes related to the Exhaust pressure sensors yet no faults can be proven there. He did locate a pinched with near those coils so he repaired that but no change. He was a bit concerned that that may have damaged the DME but has not found anything that would say this is the case just yet. The valve adjustment was brought up but typically they are loose when they need adjusted and this doesn't cause misfires (every time) so we have not gone there yet.
That said. No answers just yet.
So much fun is being had.
Any suggestions?
Thanks,
Tom
Welcome to the Forum!
Wait, 130-140 psi on all cylinders? This is a high compression motor and you should be seeing 145 - 160 psi. Valve adjustment can play a part if they are way out, I wonder if the test was conducted properly.
Next would be to check timing, for that too can lower the compression some.
Has the VANOS bolts been looked at? How about the exhaust hub tabs? Timing chain guides?
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
Welcome to the Forum!
Wait, 130-140 psi on all cylinders? This is a high compression motor and you should be seeing 145 - 160 psi. Valve adjustment can play a part if they are way out, I wonder if the test was conducted properly.
Next would be to check timing, for that too can lower the compression some.
Has the VANOS bolts been looked at? How about the exhaust hub tabs? Timing chain guides?
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
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