Seafoam Treatment Gone Wrong?
First of all, I want to thank the group for all the very helpful information here. I am new to Land Rovers since last June and, thanks to this forum, I am beginning to have a much better understanding of my 1999 Disco 2.
Well...after reading the many threads on how helpful seafoam can be, I decided to get a few cans.
I dumped one can into the fuel tank for starters.
While disconnecting the vacuum hose from the passenger side valve cover (kind of tough comming off), i heard a crack. When I finnaly got it off I noticed the stem of what i believe to be the oil separator (looks like it in the workshop manual) had broken off.
Not knowing what could be done about it at the time, I went ahead with the treatment. I used Disco Mike's method of extending the vacuum hose into the can and regulating the flow with a pair of pliers (almost stalled the engine at first, but it did not set a code).
My neighbor was pretty impressed with all the smoke about 20 minutes later when I fired it back up.
OK...here is where the trouble began...
Two days later, as some freinds and I were driving up north for a snowmobile trip (accelerating from a rest area), the service engine soon light came on (solid). I bought a Rovacom Lite diagnostics server back when I bought the truck and had decided to bring it along just in case. While driving, I had one of my friends check out the fault code, which was P0172 = MIXTURE ADAPTION FACTOR FRA BANK 1 DRIVE CYCLE C, and P0175 = MIXTURE ADAPTION FACTOR FRA BANK 2 DRIVE CYCLE C.
I had read somwhere before that all the junk passing through the system after a seafoam treatment can sometimes freak out things like O2 sensors, so after recording the faults I had him reset them.
Accelerating away from the next rest area the light came on again (same faults). I thought that maybe because I still had some of the seafoam left in the tank, it was still disolving carbon so we once again reset the codes.
After the next fill up, it never happend again for the rest of the trip north of Green Bay, all the way back down to Cincinnati.
Yesterday morning, the light came on again caused by the same codes.
I looked up the codes on the Rovacom Lite forum and one guy said he had a problem with the code due to a vacuum leak somewhere in the plenum causing the mixture to be too lean.
Now we get to the real question (sorry for being so long winded)...
Could the part that broke on the oil separator have caused this?
I am wondering if the part is also a check valve of some kind that closes at times of wide open trottle to prevent sucking too much air in.
Maybe this is all just coincidental, but its kind of funny how it started happening 2 days after giving it the treatment.
Dan
First of all, I want to thank the group for all the very helpful information here. I am new to Land Rovers since last June and, thanks to this forum, I am beginning to have a much better understanding of my 1999 Disco 2.
Well...after reading the many threads on how helpful seafoam can be, I decided to get a few cans.
I dumped one can into the fuel tank for starters.
While disconnecting the vacuum hose from the passenger side valve cover (kind of tough comming off), i heard a crack. When I finnaly got it off I noticed the stem of what i believe to be the oil separator (looks like it in the workshop manual) had broken off.
Not knowing what could be done about it at the time, I went ahead with the treatment. I used Disco Mike's method of extending the vacuum hose into the can and regulating the flow with a pair of pliers (almost stalled the engine at first, but it did not set a code).
My neighbor was pretty impressed with all the smoke about 20 minutes later when I fired it back up.
OK...here is where the trouble began...
Two days later, as some freinds and I were driving up north for a snowmobile trip (accelerating from a rest area), the service engine soon light came on (solid). I bought a Rovacom Lite diagnostics server back when I bought the truck and had decided to bring it along just in case. While driving, I had one of my friends check out the fault code, which was P0172 = MIXTURE ADAPTION FACTOR FRA BANK 1 DRIVE CYCLE C, and P0175 = MIXTURE ADAPTION FACTOR FRA BANK 2 DRIVE CYCLE C.
I had read somwhere before that all the junk passing through the system after a seafoam treatment can sometimes freak out things like O2 sensors, so after recording the faults I had him reset them.
Accelerating away from the next rest area the light came on again (same faults). I thought that maybe because I still had some of the seafoam left in the tank, it was still disolving carbon so we once again reset the codes.
After the next fill up, it never happend again for the rest of the trip north of Green Bay, all the way back down to Cincinnati.
Yesterday morning, the light came on again caused by the same codes.
I looked up the codes on the Rovacom Lite forum and one guy said he had a problem with the code due to a vacuum leak somewhere in the plenum causing the mixture to be too lean.
Now we get to the real question (sorry for being so long winded)...
Could the part that broke on the oil separator have caused this?
I am wondering if the part is also a check valve of some kind that closes at times of wide open trottle to prevent sucking too much air in.
Maybe this is all just coincidental, but its kind of funny how it started happening 2 days after giving it the treatment.
Dan
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