Seafoam treatment and now it won't idle
Thread Starter
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Drifting
Joined: Apr 2017
Posts: 49
Likes: 7
Seafoam treatment and now it won't idle
I have a 04 Disco. I pulled the vacuum line from the intake that goes to the brake booster. I put a piece of vacuum hose that fit in the hole and let the engine pull the seafoam cleaner in while the engine was idling. I would pinch off the hose a little to slow the flow of cleaner. The engine smoked to beat the band. It stalled near the end of the cleaning. I took the truck for a drive, It cleared out and ran really well except it will not idle it stalls. I pulled the codes (which I did not write down) But I saw upstream O2 codes as well as down stream codes. With live data it show no activity on both upstream sensors and only bank 2 down stream has signal.
If I pull the AFM plug off the truck will idle for about 45 seconds to 1.5 min and the stall.On a drive it seems to run well but no idle
I think I killed the o2 sensors but would that also make it not idle? I can pull codes and data and post it
Thanks in advance
If I pull the AFM plug off the truck will idle for about 45 seconds to 1.5 min and the stall.On a drive it seems to run well but no idle
I think I killed the o2 sensors but would that also make it not idle? I can pull codes and data and post it
Thanks in advance
Thread Starter
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Drifting
Joined: Apr 2017
Posts: 49
Likes: 7
Ok so I fixed the Rover. This is what happened. I let the truck pull in seafood through a vacuum line I attached to the intake manifold where the brake booster hose connects. It smoked like crazy. I then drove it for 4-5 miles and it cleared out and ran well at road speed and under power.
I pulled back into my shop and it would not hold a idle it would stall? I pulled codes with my scanner and saw misfire codes as well as O2 codes. I cleared them and readapted the settings to give the engine a fresh start. Still poor idle issues. I had no activity on two of the O2 sensors. I decided to replace them as a set. I made a mistake and bought a set off Ebay (bad idea) they didn't work as expected LOL. So I ordered a set of Bosch sensors. I replaced all four of them.
After clearing the codes, and driving it for 10-12 miles. It runs better than ever. The idle is excellent and its so much smoother.
So be careful when using seafoam I killed my o2 sensors using it. But I'm sure they needed replaced as the Rover has 130k on it. Removing the sensors was a bear. I had to heat the two front ones to get them out. I chased the treads on all the ports. The Bosch sensors had never seize on them so next time will be easier Im sure
I pulled back into my shop and it would not hold a idle it would stall? I pulled codes with my scanner and saw misfire codes as well as O2 codes. I cleared them and readapted the settings to give the engine a fresh start. Still poor idle issues. I had no activity on two of the O2 sensors. I decided to replace them as a set. I made a mistake and bought a set off Ebay (bad idea) they didn't work as expected LOL. So I ordered a set of Bosch sensors. I replaced all four of them.
After clearing the codes, and driving it for 10-12 miles. It runs better than ever. The idle is excellent and its so much smoother.
So be careful when using seafoam I killed my o2 sensors using it. But I'm sure they needed replaced as the Rover has 130k on it. Removing the sensors was a bear. I had to heat the two front ones to get them out. I chased the treads on all the ports. The Bosch sensors had never seize on them so next time will be easier Im sure
Camel Trophy
Joined: Oct 2016
Posts: 4,865
Likes: 1,409
From: Michigan
Good follow up. Just mentioned this the other day here...02's don't just die, they usually get murdered. Might be a long drawn out death, but something upstream is killing them. Like in your case, seafoam.
Some fuel additives will harm 02's also, especially if you use more than subscribed on can. If it says one can pre 20 gallons, do that. Some folks think more is better, not in this case. Normally, but not always, folks that have 02 sensors constantly going bad...are doing something or their engine is doing something to cause it.
And yes...you get the bad sensors right out of the package...thank you very much bad aftermarket parts makers.
Brian.
Some fuel additives will harm 02's also, especially if you use more than subscribed on can. If it says one can pre 20 gallons, do that. Some folks think more is better, not in this case. Normally, but not always, folks that have 02 sensors constantly going bad...are doing something or their engine is doing something to cause it.
And yes...you get the bad sensors right out of the package...thank you very much bad aftermarket parts makers.
Brian.
Thread Starter
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Drifting
Joined: Apr 2017
Posts: 49
Likes: 7
Well we have put 300 miles on the rover with ZERO issues. You are correct (The Deputy) O2 sensors are killed by many things. I see customers come in at times and say Autozone looked at me car and scanned it. They told me I need a new O2 sensor? More time than not its a vacuum leak or something else causing the O2 code
I guess I was surprised that I took out 3 sensors with seafoam all at once. And that is effected the idle so much. But all it well I replaced a 4 sensors with bosch and I replaced the air flow meter as well. The one on the truck had yellow paint marker on it from a salvage yard. Its best to replace it as well if I just put in the O2 sensors
She runs awesome
I guess I was surprised that I took out 3 sensors with seafoam all at once. And that is effected the idle so much. But all it well I replaced a 4 sensors with bosch and I replaced the air flow meter as well. The one on the truck had yellow paint marker on it from a salvage yard. Its best to replace it as well if I just put in the O2 sensors
She runs awesome
TReK
Joined: Feb 2013
Posts: 2,514
Likes: 656
Seafoam is a total joke!
Seafoam works to remove carbon, but you DO NOT use the entire bottle, you use the amount suggested, let it sit 10min & run it until it burns off. I’ve used it on GEMS/Bosch LR’s and I’ve had good results in removing some carbon deposits. If you DO NOT follow the directions yes you can certainly mess up something by either hydrolocking the engine or in this case cause O2 sensors to foul. Remember you’re loosening up carbon deposits from the cylinders & whatever breaks loose is going to go right pass the O2 sensors.
I’ve used it for years & I’ve yet to do any damage whatsoever. It removed a lot of deposits on my 97 4.6L HSE Vitesse Range Rover.
Very quick way to check for carbon buildup on a D2 = crank it up, place it into 1st gear & leave it there. Then hit the street and gas it until you hit the rev limiter. If it looks like you’re rolling coal behind you = you have carbon build up inside your engine. LR would have informed the customer, and performed a LR fuel treatment.
I’ve used it for years & I’ve yet to do any damage whatsoever. It removed a lot of deposits on my 97 4.6L HSE Vitesse Range Rover.
Very quick way to check for carbon buildup on a D2 = crank it up, place it into 1st gear & leave it there. Then hit the street and gas it until you hit the rev limiter. If it looks like you’re rolling coal behind you = you have carbon build up inside your engine. LR would have informed the customer, and performed a LR fuel treatment.
Seafoam works to remove carbon, but you DO NOT use the entire bottle, you use the amount suggested, let it sit 10min & run it until it burns off. I’ve used it on GEMS/Bosch LR’s and I’ve had good results in removing some carbon deposits. If you DO NOT follow the directions yes you can certainly mess up something by either hydrolocking the engine or in this case cause O2 sensors to foul. Remember you’re loosening up carbon deposits from the cylinders & whatever breaks loose is going to go right pass the O2 sensors.
I’ve used it for years & I’ve yet to do any damage whatsoever. It removed a lot of deposits on my 97 4.6L HSE Vitesse Range Rover.
Very quick way to check for carbon buildup on a D2 = crank it up, place it into 1st gear & leave it there. Then hit the street and gas it until you hit the rev limiter. If it looks like you’re rolling coal behind you = you have carbon build up inside your engine. LR would have informed the customer, and performed a LR fuel treatment.
I’ve used it for years & I’ve yet to do any damage whatsoever. It removed a lot of deposits on my 97 4.6L HSE Vitesse Range Rover.
Very quick way to check for carbon buildup on a D2 = crank it up, place it into 1st gear & leave it there. Then hit the street and gas it until you hit the rev limiter. If it looks like you’re rolling coal behind you = you have carbon build up inside your engine. LR would have informed the customer, and performed a LR fuel treatment.
I am thinking less now.