TurboSpeed

Brand new spark plugs, got both the coil-pack rebuild by RMT in FL last year and a year later having P0300 (random) along with Clyinder 1, 5 and 6. These are the only cylinder that are misfiring and it only happens when I accelerate hard or full pedal. I can't believe if i have to send it out again to get it rebuild. Is their anything else I can check that might be causing it, its odd it only happens hard acceleration and its always random but sometimes all 1,5,6 show up, sometimes only cylinder 5 shows up. I can drive the car normal with out triggering the check engine light but im about sell the car and want to get this addressed before selling.

Its a 2004 Mercedes s600. Any advise help be great, is their anything else that might be issue here since it only happens at hard acceleration with same cylinders misfiring ?

tusabes

TurboSpeed

Thanks for quick replay. I do realize that RMT is garbage now, it cost me $750 for each, got both replaced at same time just a year ago, they don't offer rebuild on website anymore but i emailed them and they said they would rebuild it for $500 since its days out of the warranty. Shouldn't the o2 throw a different code, and accelerator pedal i heard problems with but i thought it had its own code as well. CPS is that crankshaft sensor? Ill look into that, its just always the one bank and the same three cylinders misfiring, sometimes together sometimes separate along with random, i just can't link that to the acc. pedal. Now the o2 or cats might be issue since its on one bank but i checked cats temperature when running and its same as the other side. shouldn't o2 throw their own code ? I know sometimes they don't at all, but in these situation i do get a check engine light.

kraut56

you can only read the cat codes properly with SDS (code TWC DAMAGE) , which will shut down affected cylinders to prevent damage (due to bad O2 sensor readings)
Good luck!

TurboSpeed

Interesting, so if o2 is bad it shuts of cylinder but would it also throw a p0300 random misfire ? P0135, po147, po155 and p0167 are all the o2 sensors codes, if they aren't triggered by a bad o2 sensor which i know can happen, but would they still throw code p0301 for example? If the o2 sensor shut the cylinder off it should come up on ur OBDII as o2 sensor, otherwise the cylinder wouldn't get shut down ? Just trying narrow it down, i have taken my car apart one to many times and with such big engine, the heat is killing everything around it so when i remove things they usually brittle and break. I took my car to Mercedes dealership for a rear main seal and they messed things up even more years ago and i am not welcome back, otherwise I would take it to them and find out what problem is before I start taking things apart.

tusabes

kraut56

yes - it will trigger both p300 misfire codes (can be read with any scanner) and TWC codes (need SDS)

TurboSpeed

Lose your attitude.. me "questioning" something to get a better understanding isn't a bad thing. quit your nonesense

TurboSpeed

Ok, if thats the case then it wouldn't surprise me being the o2's. I would be very happy if thats the problem, appreciate all your input Kraut. I will get a proper reading of the o2's this weekend.

tusabes

ItalianJoe1

It's the coil 95% of the time. Rebuilds are guesswork at best and not enough of a savings to justify, you can get new ones for a little over 1k if you shop around, and they work without a doubt.

TurboSpeed

Why comment some so useless, you just spam this form. Take your emotions out your chest and kick rocks.

TurboSpeed

Didn't expect it to come back so soon, i just got them rebuild last year. Had i known this might happen, I would have gone with FCP and payed extra for the lifetime warranty, peace of mind is priceless. Good chance is o2 which im having checked properly this weekend, if not its the dam coil again.

Clark Rupp

Need to jump in here....... My rebuilds involve no guesswork ! Guaranteed to work and never had one come back - coming up on 500 units out in field world-wide. I know you meant everyone else's rebuilds...... :-) Clark V12icpack.com

TurboSpeed

Clark I had mine rebuild last year, both of them and got the o2 sensors checked last week and they are all reading good. How much would you charge me for one coil to be send in and rebuild. I just went through all this last year and can't believe I got to do it again.

Clark Rupp

TS, I have to assume these aren't my packs !?? Since I've never had one fail, I'm a little anxious to get one back some time and see where the weak link is - if there is one. The best way to tell if you got scammed is...... its not possible to buy ignition coils that are stamped with "Temic" or "Beru" part numbers like the OEM ones. If your "rebuilt" coil packs are stamped then they were used parts that passed a spark test and combined with others to make up a temporarily functional coil pack. If the guide tubes are smooth with no markings at least they were brand new aftermarket ignition coils. To answer your question, you have two options 1). Send me your pack and I'll verify its good/no good. Rebuild price is $699 with all new coils and there are about 25 key electronic components that I check for spec compliance and replace as required. 2).I try to keep a tested, ready to ship inventory on the shelf. Over the last two years I have purchased about 75 coil packs to support this exchange program ( I have 9 right now, the rest are out all over the planet). You can buy one off the shelf for $699 plus a $300 core charge. When you get it and it fixes your problem just send back your old one and I'll refund the $300 core charge the same day I get it. If it does not fix your issue, send it back and I'll refund the $699 and the $300 core charge - less $90 rental fee if that option wasn't paid for at the time of ordering. Literally, in the last two weeks I have shipped to South Africa, New Zealand, UAE, Switzerland, UK, Finland and all over the US. Can you imagine what I would be dealing with if these things didn't work !

TurboSpeed

What is your warranty on your coils ?

Clark Rupp

TurboSpeed

See thats same with RPM whom i got it done with a year ago, they give you a 1 year and tell you they will take care of you if something happens after that. Turns out it did, when I contacted them they said they would go down to $500 which is still ridiculous. Not trying knock you v12rebuild it seems you have a good reputation but I think at this point paying $1300 for lifetime warranty is way to go. Thanks for your help I'm still debating what to do.

ItalianJoe1

You put more into it than the other "rebuilders" out there, I'm sure. But for me, the cost difference between a good rebuild and a new pack isn't enough to justify the cost. I have referred people to you as an option on here plenty of times.

I do have a pair of cores if you are interested. One has a broken coil (first cyl, first coil, stayed on the engine when the pack came off for plugs), the other was starting to misfire on #10/#11 at times under load. Also have a transformer as I replaced it with the newest unit at the same time.

Clark Rupp

I pay $100/core and you have to pay to get it here....... ship as slow as you want to save $$. I appreciate the references ! I just got a source on new covers so all rebuilds will be going out with new covers on them too.

Clark Rupp

I think I'll put a new item in my store....... Lifetime warranty - coil packs $999

pmercury

iTrader: (2)

Hi Clark
When you rebuild the coilpacks, you change ALL coils right ? not just e few not working ?

Clark Rupp

Yes, 12 new coils and there are about 25 semiconductor components that need to be checked to make sure they're not blown or still within spec. Very few packs can just get new coils and work.....

pmercury

iTrader: (2)

That is why you are the only trusted coilpack repair in my eyes

I have seen it all

nice !
bad part for Europeens is the taxes, that takes your price up to very close to new