CL-Class (W215) 2000-2006: CL 500, CL 600

new engine running rough (55 m113) with a lot of injector/MAF codes

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Old 04-16-2013, 01:41 PM
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2002 CL500 to CL55 conversion
new engine running rough (55 m113) with a lot of injector/MAF codes

i had more codes than my reader could store (i think it only takes 9 at a time) when i first started my engine. engine would quickly stall out after starting and would only remain running with some throttle being applied.

edit:runs very rough with throttle being applied though

realized i forgot one of the o2 sensors and managed to get rid of the o2 related codes. then i swapped the MAF from my old 500 engine (which was known to be good) and got the car to run and idle but i'm still getting a p0112 code (air intake temp circuit) and p0412 code(air intake related). i doubt both of my MAF's are bad so i'm thinking the problem lies elsewhere

also have codes p0207, p0208, p0202, p0206, p0203 (fuel injector voltage problems) that continue to show after restarting/ clearing codes.

i'm not sure if it's important but i do not have the air box/air filters on the car yet, i'm not sure if this would make a difference? i haven't gotten the car up to normal operating temps

also getting p0403 code which looks like it's egr valve. will try to do some more research on what this is and how to change it as i have never done it before and i'm sure the EGR from my old 500 engine will interchange


also getting some white smoke from what looks like the spark plugs. same thing happened last time I put in NGK spark plugs on my 500 engine....checked all fuses in the ECU fuse panel and didn't see anything wrong. i doubt i have 5 bad injectors so i'm thinking it's a vaccuum leak but i don't see what could be causing the issue. i also tried releasing the air from the fuel supply through the schrader valve with no luck

thanks for any advice and long live the 215! as well as the mbworld forums since nidazanyo is banned from here

cliffs - new engine in car, codes P0112 P0207 P0208 P0202 P0206 P0203 P0403 P0412 along with really rough idle. surging/knocking

Last edited by ctravis595; 04-16-2013 at 02:54 PM.
Old 04-16-2013, 06:26 PM
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2002 CL500 to CL55 conversion
got it figured out, o2 sensors on the wrong sides lol

here's a vid of her starting up


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