Hello everyone!

A little about myself: I live in BC, Canada. I'm passionate about cars and always have been ever since I was a kid. I'm an apprentice tech. focusing on European vehicles(Out of which I love Mercedes and BMW the most. Ying&Yang ;D) and love learning new things. These cars are amazing.. when they're running that is.

SO... I've jumped into the belly of a beast and I need some help getting out the right end LOL ;p

I just bought 2003 E55 AMG with 157xxxKM that was in an accident, the accident was not bad. As of right now it does not run. The only mechanical damage to the vehicle was the radiator. It was replaced and then the vehicle was running and driven for about a week.

It was driven by the gentleman that rebuilt it, he mentioned before it stopped running, at WOT it would cut out and lose power and run really rough at idle. It got codes for MAP sensor and that was replaced - codes still there. I believe when the MAP sensor was being replaced the throttle cables got swapped. It also has codes for throttle potentiometer now and the vehicle will not stay running, It burns through fuel on cold start and it smoking thick black out the back. BUT WAIT THERE'S MORE lol. There are 2 fuses for the throttle bodies and 1 of them is off center(dont know why but it is functioning). The front SAM has wires stealing power from a fuse(will confirm number and purpose) and it goes somewhere in behind it and I think to the dash, will take it all apart and post pics. There is also some sort of turn dial that is installed on the left hand side of the steering wheel, which is where I believe that wire goes to. I made a video of the dial because it makes an audible tone when switching it. The SAM has corrosion building around the fuses so I'm going to take it out and clean it up. Will also take pics of it then.

The vehicle has quite a few mods on it, I'm still going through the vehicle and figuring it all out. Here is what I know it has now: 74MM fixed pulley w/ belt wrap, 82MM throttle body, modified exhaust w/ long tube headers and 550cc fuel injectors. I got the files read off the car and according to a tuner it has a **** tune. I don't know what to do there. I feel like the right course of action here is to get the vehicle in running order, figure out exactly what is what when it comes to mods, put it on a dyno and re-tune it.

HELP PLEASEEEEEE!!!!!!
THANK YOU FOR READING!!!!!!

 

Does anyone know what that turn dial is or could be ?

 

K40 radar detector

 

The off-center fuse is normal, those spots have an 'a' and a 'b' designation in the fuse diagram. Looks like it was just tapped into for the radar detector.

Yeah, first step is to get a base map on the car. With the injectors you can't use a stock map, so you'd need a tuner (I'd recommend RaceIQ) who has an off the shelf map for 550cc injectors and the other mods. You can also go straight to the dyno and start tweaking, but if you think/know it has a bad tune on there who knows what you're dealing with from the start.

MAP and TPS codes and having that 82mm TB on the car - that is not uncommon. May be worth picking up and switching back to a stock TB to eliminate that issue. Too many people have erroneously replaced MAPs that were just fine, the codes are set because the airflow confuses the MAP and the 82mm TBs in particular are to blame in many cases. And the cutoff could just be overboost with a bad tune.

 

@E55Greasemonkey

Thanks a ton! will have to hunt the wires down to make sure the radar unit is still there from the accident.

 

@GinDistiller

Thanks for all the info and guidance!

I did do some research and have found lots of issues with the 82MM TB mod. I did see a few posts were even going back to stock it will still have the same issue.. anyone know whats more common? mechanical or software? Also on mine It looks like its been bored out on the inlet side of the SC in order to fit the 82MM TB. Unfortunately I don't think I can go backwards without replacing the inlet of the SC.. any other options?

I was hoping to take the SAM out today but it started raining so I might have to wait. More than likely I will have to replace the SAM before moving forward due to the corrosion and electrical faults in the vehicle, once thats back in I'll tackle the trottle issue.

Thanks again everyone!!

 

Of course! The inlets have to be ported for the 82mm TBs, but most use an adapter plate (search 82mm adapter for a picture). If you have an adapter plate, you can easily go back to stock by removing the plate. I wouldn't worry about issues on the stock TB, those problems mentioned are definitely tune related in that case, but for most with 82mm problems the switch back to stock solves them (and if they didn't it was probably an intake leak that went undetected, not related to the TB itself).