Increased Emissions
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From: Parsippany, NJ
Engine is shuddering on occasion. Thought it might have been some dodgey gas I picked up a few weeks ago but no go. Now I have a check engine light and a warning on the I-drive about increaed engine loads may damage the catalytic converter. The shuddering comes and goes at lights and while driving. Took it to Autozone the read the codes and it's a compression error on cylinder 7. Since she's due for a tune up anyways, I was thinking of just replacing the coil and plug. Any advice?
Sean
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From: Atlanta, GA
My Ride: 2008 535i:
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Umnitza ICE-Lite 10w LED 6000k AE's
1992 Camaro RS:
Fully Restored w/Custom Interior, 5.0L V8, T-tops, OEM Z28 Foglamps, Inst Cluster, & Spoiler, Custom Sound, Too many engine mods to list
Originally Posted by VW2545i' post='986410' date='Aug 23 2009, 05:37 PM
Engine is shuddering on occasion. Thought it might have been some dodgey gas I picked up a few weeks ago but no go. Now I have a check engine light and a warning on the I-drive about increaed engine loads may damage the catalytic converter. The shuddering comes and goes at lights and while driving. Took it to Autozone the read the codes and it's a compression error on cylinder 7. Since she's due for a tune up anyways, I was thinking of just replacing the coil and plug. Any advice?
Sean
Sean
Your problem could be much worse.
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From: Parsippany, NJ
Originally Posted by pukka' post='987042' date='Aug 24 2009, 09:47 AM
Compression error?! Did A-zone check to make sure a good spark was occurring? Did they perform a leak down test to confirm you weren't losing compression in the cylinder?
Your problem could be much worse.
Your problem could be much worse.
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Joined: Jun 2007
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From: Atlanta, GA
My Ride: 2008 535i:
(8/07 Build) Metallic Bronze, Beige NASCA Leather, Ventilated Seats, Sport Pkg, Cold Wxr Pkg, Logic-7 Sound, HUD, Night Vision, PDC, Split Rear Seats, NAV, Premium Pkg, Comfort Access, HD Radio, Sport Auto Trans
Current mods: M-Aero Kit, JB4, Motorcepts 6000k HID Foglamps
Umnitza ICE-Lite 10w LED 6000k AE's
1992 Camaro RS:
Fully Restored w/Custom Interior, 5.0L V8, T-tops, OEM Z28 Foglamps, Inst Cluster, & Spoiler, Custom Sound, Too many engine mods to list
If you can, use an inductive timing light to check for a spark accross the #7 wire. Make sure the wire is firmly connected to the distributor and plug. Depending on how many years/miles the car has, new plugs, wires and a timing check isn't a bad idea.
A compression error suggests a problem with the cylinder valves, piston, or gasket seal. You'll most likely have to have a dealer or indy mechanic check it out. GL.
A compression error suggests a problem with the cylinder valves, piston, or gasket seal. You'll most likely have to have a dealer or indy mechanic check it out. GL.
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From: Encino, CA
My Ride: 04 545i - Titanium Silver/Black, Sport pkg, Comfort Seats w/ Lumbar, Premium Sound, power rear sunshade, Adaptive Xenon Headlights, Steptronic, Park Distance Control, Fold down rear seats w/ski bag, Aux jack, 6-disk changer, puddle lamps...
Engine: Custom Remus cat-back exhaust w/chrome square tips, K&N Air Filter, Charcoal Filter Removed, Sprint Booster :-), 50/50 mix of 91+100 Octane, EuroRev ECU Remap (coming soon lol), Dinan High-Flow Throttle Body (coming soon...maybe lol)
Interior: Portable Sirius Stilletto 100 w/car kit, Garmin Nuvi 680 mounted below rear-view mirror, LCI-style I-drive knob, Dark Poplar Center Dashboard Trim.
Exterior: E60 forum clings, 5% rear tint, ACS roof spoiler (painted black for distinct look against limo tint), ACS trunk spoiler, ACS add-on front spoiler and rear apron (awaiting installation), "18 Black Staggered BeBeS Style OER (emergency replacement for cracked sport 124 rims), black kidney grill, white accessory lighting (including license and trunk lamps), Angel-eye upgrade, AIB xenon-matched fog lamps, AIB V3's on order, red rear reflectors
Originally Posted by pukka' post='987355' date='Aug 24 2009, 12:48 PM
If you can, use an inductive timing light to check for a spark accross the #7 wire. Make sure the wire is firmly connected to the distributor and plug. Depending on how many years/miles the car has, new plugs, wires and a timing check isn't a bad idea.
A compression error suggests a problem with the cylinder valves, piston, or gasket seal. You'll most likely have to have a dealer or indy mechanic check it out. GL.
A compression error suggests a problem with the cylinder valves, piston, or gasket seal. You'll most likely have to have a dealer or indy mechanic check it out. GL.
Unfortunately (fortunately?) these cars have individual coil packs directly atop the plug, which eliminates the distributor and associatd wires. Removing the fuel pump fuse/relays, verify a no-start condition, removing the coil pack, attach a spare plug to it, ground the plug against the strut tower screw, have an assistant crank briefly while you verify a spark occurs may work. +1 on typical compression losses. A cracked/leaking/improperly torqued spark plug, though rare, can also cause loss of compression.
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Joined: Jun 2007
Posts: 1,845
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From: Atlanta, GA
My Ride: 2008 535i:
(8/07 Build) Metallic Bronze, Beige NASCA Leather, Ventilated Seats, Sport Pkg, Cold Wxr Pkg, Logic-7 Sound, HUD, Night Vision, PDC, Split Rear Seats, NAV, Premium Pkg, Comfort Access, HD Radio, Sport Auto Trans
Current mods: M-Aero Kit, JB4, Motorcepts 6000k HID Foglamps
Umnitza ICE-Lite 10w LED 6000k AE's
1992 Camaro RS:
Fully Restored w/Custom Interior, 5.0L V8, T-tops, OEM Z28 Foglamps, Inst Cluster, & Spoiler, Custom Sound, Too many engine mods to list
Originally Posted by advancedlogic' post='988095' date='Aug 25 2009, 12:09 PM
Unfortunately (fortunately?) these cars have individual coil packs directly atop the plug, which eliminates the distributor and associatd wires. Removing the fuel pump fuse/relays, verify a no-start condition, removing the coil pack, attach a spare plug to it, ground the plug against the strut tower screw, have an assistant crank briefly while you verify a spark occurs may work.
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Joined: Sep 2007
Posts: 1,712
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From: Encino, CA
My Ride: 04 545i - Titanium Silver/Black, Sport pkg, Comfort Seats w/ Lumbar, Premium Sound, power rear sunshade, Adaptive Xenon Headlights, Steptronic, Park Distance Control, Fold down rear seats w/ski bag, Aux jack, 6-disk changer, puddle lamps...
Engine: Custom Remus cat-back exhaust w/chrome square tips, K&N Air Filter, Charcoal Filter Removed, Sprint Booster :-), 50/50 mix of 91+100 Octane, EuroRev ECU Remap (coming soon lol), Dinan High-Flow Throttle Body (coming soon...maybe lol)
Interior: Portable Sirius Stilletto 100 w/car kit, Garmin Nuvi 680 mounted below rear-view mirror, LCI-style I-drive knob, Dark Poplar Center Dashboard Trim.
Exterior: E60 forum clings, 5% rear tint, ACS roof spoiler (painted black for distinct look against limo tint), ACS trunk spoiler, ACS add-on front spoiler and rear apron (awaiting installation), "18 Black Staggered BeBeS Style OER (emergency replacement for cracked sport 124 rims), black kidney grill, white accessory lighting (including license and trunk lamps), Angel-eye upgrade, AIB xenon-matched fog lamps, AIB V3's on order, red rear reflectors
Originally Posted by pukka' post='988141' date='Aug 25 2009, 09:41 AM
Shows how much I've been under the hood of my 5er......
