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post #1 of 19 (permalink) Old 04-18-2017, 02:25 PM Thread Starter
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OT: Modern cars

Normally I don't do any work on the modern cars in my fleet. I guess I'm too intimidated by the gee-whiz electronics and the shrouds that don't let you see anything that matters. No dipstick! - whose genius idea is that?

Anyway, the 2008 BMW was running rough and showing a "service engine soon" light. I am just about to sell this car and am reluctant to spend dealer dollars on fixing it first, so I decided to give it a go myself.

I borrowed an OBDII reader from my neighbour and discovered a misfire in cylinder #1, which I surmised is likely a faulty dedicated coil (6 of those on this engine) or less likely a bad plug. It took me a half hour to excavate my way to the coils, and I confirmed the suspect was bad by swapping it to another cylinder where the problem followed it. New coil is on its way from Amazon ($40). Another half hour reassembly and I'm done.

I'm a bit proud of myself and slightly less intimidated now. Not that I'm about to start disassembling turbochargers or the like.

PS: Kudos to Youtube and its contributors for useful tutorials.
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Last edited by dugald; 04-18-2017 at 03:21 PM. Reason: add PS
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post #2 of 19 (permalink) Old 04-18-2017, 04:26 PM
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Coil packs aren't much newer than our 107s. I am intimidated by the price tag though. $50 for a single coil, or $40 per cylinder. You won by $10 this time, but I decided to pass on a v12 1996 600sl r129 because it had at least three cylinders not firing right. My reading showed me you might spend $80/cylinder because there's more than just the coil pack to replace in that car's case. That's where more common cheaper parts like Honda (or generic brand) parts are nice. It's nice to drive down the street and pick up an alternator in stock at autozone for under $100. That doesn't happen with old cars. You may have been able to pick up a coil pack locally and had the job "done" if in a rush.

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post #3 of 19 (permalink) Old 04-18-2017, 05:05 PM
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I agree, YouTube is a great resource.
I had a similar experience with my son's Isuzu Trooper.
It too has coil packs - misfiring on Cylinder 3.
I just removed the Coil and Spark Plug, cleaned, and replaced - OK.
One resource for OBD2 I like if you have an Android-based Smartphone is to purchase a Bluetooth enabled ELM327 interface (Ebay or Amazon < $10.00) that plugs into your OBD2 connector. I run the App called Torque on my Smartphone to read the codes, clear codes, and monitor sensors like Fuel Trims. Really wish our R107's had OBD2. If I someday purchase an R129, its going to be later year ones with the OBD2 interface.

BTW, it still continues to amaze me how Electronics and Software has eliminated the function of the mechanical Distributor. That is an ingenious development.
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Last edited by cwmoser; 04-18-2017 at 05:10 PM.
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post #4 of 19 (permalink) Old 04-18-2017, 05:45 PM
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Originally Posted by cwmoser View Post
I agree, YouTube is a great resource.
I had a similar experience with my son's Isuzu Trooper.
It too has coil packs - misfiring on Cylinder 3.
I just removed the Coil and Spark Plug, cleaned, and replaced - OK.
One resource for OBD2 I like if you have an Android-based Smartphone is to purchase a Bluetooth enabled ELM327 interface (Ebay or Amazon < $10.00) that plugs into your OBD2 connector. I run the App called Torque on my Smartphone to read the codes, clear codes, and monitor sensors like Fuel Trims. Really wish our R107's had OBD2. If I someday purchase an R129, its going to be later year ones with the OBD2 interface.

BTW, it still continues to amaze me how Electronics and Software has eliminated the function of the mechanical Distributor. That is an ingenious development.
I use a similar ELM interface but for the IPhone with an app called DashCommand. It is amazing all the information that is at your finger tips.
I primarily use it to reset the same code that I get on a regular basis (about every 3-4 month) on my Honda S2000. The fault is related to the evaporation circuit. I am just too lazy to fix it. The R107 takes priority.
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post #5 of 19 (permalink) Old 04-18-2017, 06:00 PM
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I have another gizmo for Toyota and Lexus vehicles called Techstream. It can do things like accept new keys, set how the mirror and windows work, etc along with the OBD2 Engine management. Techstream though requires a Windows based OS. I purchased a Winbook Tablet running Windoze 10 on Ebay for $40.00. Techstream interface runs around $20 and the software is downloadable.

That is interesting that the iPhone can work with the ELM327. My son has the iPhone - think I'll get him the interface. How much is the DashCommand app?

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post #6 of 19 (permalink) Old 04-18-2017, 06:30 PM
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Originally Posted by cwmoser View Post
I have another gizmo for Toyota and Lexus vehicles called Techstream. It can do things like accept new keys, set how the mirror and windows work, etc along with the OBD2 Engine management. Techstream though requires a Windows based OS. I purchased a Winbook Tablet running Windoze 10 on Ebay for $40.00. Techstream interface runs around $20 and the software is downloadable.

That is interesting that the iPhone can work with the ELM327. My son has the iPhone - think I'll get him the interface. How much is the DashCommand app?
I think the DashCommand software was $12. The Elm327 has to be compatible with the IPhone
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post #7 of 19 (permalink) Old 04-19-2017, 03:43 AM
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Is the difference with the ELM327's that the iPhone requires WiFi and Android requires Bluetooth?

Carl



"You have chosen to drive a MERCEDES-BENZ, a car in whose construction and production we have taken great pains because we believe that quality is not a matter of chance." -- page 3, Owners Manual 380SL
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post #8 of 19 (permalink) Old 04-19-2017, 03:53 AM
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Originally Posted by Fonzi View Post
Coil packs aren't much newer than our 107s. I am intimidated by the price tag though. $50 for a single coil, or $40 per cylinder. You won by $10 this time, but I decided to pass on a v12 1996 600sl r129 because it had at least three cylinders not firing right. My reading showed me you might spend $80/cylinder because there's more than just the coil pack to replace in that car's case. That's where more common cheaper parts like Honda (or generic brand) parts are nice. It's nice to drive down the street and pick up an alternator in stock at autozone for under $100. That doesn't happen with old cars. You may have been able to pick up a coil pack locally and had the job "done" if in a rush.
is the SL600 still available.
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post #9 of 19 (permalink) Old 04-19-2017, 04:21 AM
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Originally Posted by cwmoser View Post
Is the difference with the ELM327's that the iPhone requires WiFi and Android requires Bluetooth?
Not sure if that is the only difference. I bought the ELM module about 3-4 years ago and the WIFI version was the only one available for the IPhone at that time.
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post #10 of 19 (permalink) Old 04-19-2017, 07:08 AM Thread Starter
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Originally Posted by cwmoser View Post
One resource for OBD2 I like if you have an Android-based Smartphone is to purchase a Bluetooth enabled ELM327 interface (Ebay or Amazon < $10.00) that plugs into your OBD2 connector. I run the App called Torque on my Smartphone to read the codes, clear codes, and monitor sensors like Fuel Trims.
Thanks for the tip Carl. I didn't know these exist. Just ordered one.
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