Just throwing it out there, but a member once got an issue with the way the wiring was done (extension) or O2 sensors been swapped left to right , can not remember

Well two things..

When I sprayed my cam covers, I noticed that each coil pack has a designated location... did not notice this before... And I must have had these packs off and on about 10 times since Ive had the car ...

So in case you guys have not noticed there is a specific order to where they go in... its coded on the plug boot and the cam cover at each location. I dont think it makes too much difference, but I suppose there had to be a reason for them having this coding.

So I put it back together in the right manner, and while I have not activated the aquamist again, I have zero codes as yet. Will try again soon with spray on.. I am spraying ahead of the intercooler.... FWIW

I an questioning if it is the 02 extension causing issues, so I ordered new universal bosch sensors so I wont have any splices.


On another note, anybody who isnt running rear 02s, where are they sitting? Did you weld bungs in?

Hmmm, I had mine off for the header install. Perhaps coincidence or maybe there really is something stupid about how mercedes did it, either way I will check it out.

Thanks

ok everything in the right order and still get the misfire code when spraying but only when I am off the throttle after a wot blast. So looks like i have some latent water pooling after a wot run ... as the system seems to spray 2-3 seconds after I have come off the trottle for some reason

Always the same side / cylinders 5&7 ...

How you coming on tibi?

I thought I had got mine fixed, a 3days of driving no problem and i raced on friday. However yesterday i misfired again (5 only), however it was awfully humid so I am guessing the water/meth couldn't fully vaporize. Once I turned it off she was all good to go.

I am simply going to stop spraying it on the street and keep it for the track

Tibi and Stevebez,

Any update on this situation?

I have similar situation with my car, misfire and the car around 1800 - 2400 rpm seem to be suffocate and it gave small smoke. I stopped spraying and this is the second day but I don't drive the car for long, I will check in 2 more days how the car feels.

I have the nozzles after SC, before the IC. Even when I use only water, similar situation. What size of nozzles guys are you using?

My engine mods:

- 82mm TB
- Brabus Pulley
- KLEEMAN headers
- W/M post SC but pre IC
- 550cc Fuel injectors + TTM rail design

forget to mention, I run without Cats

My problems went away after a retune and new o2 sensors.

Having simmlar issues, P2096 and P2098 as well. But randomly the car will sometimes throw a random misfire code. the car will run like dick, until i clear the code and restart. Then all will be well....??

FF LT headers 2 200 cel race cats secondary o2s disabled but there are bungs and they are in. No issues for 1 month prior to having eurocharged flash the car for the headers, now after timmay fest I have been throwing the codes weekly... Any thoughts?

When I got the P2096 and P2098, my o2 sensors were bad, replaced them, and no more codes. I dont run meth yet?

same with me and a buddy had clogged race cats that caused the same codes....

When you did the tune, you were using the water/methanol?

What did you replace them with?

P/N?

Have not tried to spray again recently. Will do on Sunday. I have one 0.8mm nozzle after s/c ahead of I/C, water only.

Ill try fiddle with the trigger point and mbe set the start point at a higher IDC, so I use less water and see if it still happens.

Well picked up a misfire almost instantly after I had a short wot blast. Car running rough at idle, hunting a bit. Siwtched WI off and car settled down soon after. I think either the IAT or the MAP getting wet and throwing things into disarray. Mbe my flow is set too high here and mbe I should spray according to boost rather than IDC...

I dont get why I get misfire at part throttle (low IDC) when I should be spraying nothing at anything less than 70-80% IDC...

Mbe its the interaction between the ecu electronics and the Auquamist unit. Ill set the flow to a higher IDC and see if it returns.

I have the AEM, I have similar issues to yours. I get misfire and rough idle when I spray either water alone or W/M. I stopped spraying for couple of days and I noticed a difference, I switched it back on yesterday to check but I changed the start boost of spraying to 11 psi and full boost at 15psi, I had similar issue but less than before.

I run my nozzle after SC, before the IC. Nozzle size is 550 cc/min, will a tune will help? I am waiting to get a tune and maybe re check again.

Bumping a somewhat old thread but what was the definitive fix for these codes and were you all getting a slightly rough idle when cold? Trying to figure out if I have to pull down my race cats for inspection. I used a liberal amount of permatex ultra copper sealant to seal my ball and socket connector around my collector AMD can't help but wonder of its partially clogging both cats

My problem was caused by dieing o2s. The primaries woulddrop down yo o volts and linger there. When they did so the car misfired. When the perked up the car seemed normal.

WILD GUESS CHECK YOUR FUEL INJECTORS AT START UP AND WHEN IT IS WARM