no one has anything else I can do to help him diagnose this? I've never had experience with seafoam so am not really sure what it could have messed up
Hey guys, a kid I work with and help out with his car came up to me at work yesterday and said he thought he may have ****ed up his car using seafoam, which I told him not to do if he had never done it before Anyway from what he told me, he sucked half a bottle of it up through a vaccum line on the throttle body slowly enough that the engine did not cut out. He said when he finished sucking it up, he killed the engine and then let it sit for 10-15 minutes like it said on the bottle. He also put the other 1/4 bottle into the valve cover filler, and 1/4 into the gas tank.
He said after waiting 15 minutes the car would no longer start. He tried cranking multiple times but got nothing. I told him yesterday to let it sit for a day, change or clean the plugs, and take one plug out and try and crank it to see if it will crank over. He came in today telling me he put in new plugs, removed the manifold and drained some seafoam still in the manifold, and tried starting it with one plug out all still to no avail...
At this point I told him I would come over tomorrow to try and help, were going to start by draining the oil and replacing it...but does anyone else have any advice I can pass on to him. I've never personally seafoamed my car so Im not really sure what he may have messed up. Any advice, and would sucking the seafoam through the TB have maybe ruined it (its DBW).
Thanks guys, just trying to help this kid out
So fuel pressure is within spec. You've confirmed good spark. Have you ever performed a compression test before?
Next logical step would be to check compression, and hope he didn't hydrolock the engine when he seafoamed it.
Sorry to update so late but I was able to help him get it running. It took alot of time to try and flush out the seafoam that was binding the engine from turning over but it finally did with one of the plugs out.
After getting the car all buttoned back up, he is getting a misfire code for just cylinder 4, and he just put in new plugs yesterday, a relatively new coilpack(3 months) that has no cracks, and less then 6 month old plug wires. Another code is also for the first o2 sensor which is definitely fouled just by inspecting it visually.
Any chance the one random cylinder misfire could be because of the 02 sensor, because everything else seems to be good to go
He then took it to autozone to get scanned again last night and texted me saying it was also showing...
Name's not Anthony, but whatever
If the O2 sensor is visibly damaged, replace it. It'll have to be replaced anyway. Direct-fit Bosch or OE only.
Could a coil have failed that quick? Sure, especially if it's a cheapo made-in-China coil. But I wouldn't go there so fast. This car was running fine before he pumped it full of Seafoam. Generally when a car is running fine before a repair, and has problems after, you want to look toward what was done to the car as the most likely cause.
Misfires can have a number of causes, I see them on VAG cars all the time. With the exception of 16514, you've got all misfire codes. Yes a bad O2 sensor can cause mixture issues, which can in turn cause misfires. Which is why I asked if the car has a dead miss (noticeably running rough all the time, as though on 3 cylinders), or if it seems to be running well and just throwing misfire codes. There's a difference.
If he dumped too much seafoam into the engine too fast, he could very well have hydrolocked the engine, causing internal engine damage TBD. A compression test will tell for sure if this is the case.
Unfortunately he had to work today and I was too busy working on my own car, so hopefully compression test will get to happen tomorrow
Thanks guys but this has long since been resolved. When i finally got my hands on the car i removed the upper and lower intakes manifolds and drained all the sea foam that was pooled up in there. After draining that and letting it sit in the sun for a few days it started... but there was so much in the head that it fouled the plugs and eventually fouled the front 02 sensor. After replacing all those his car is back to running just fine, But i told him to never touch the motor again if he isnt sure what hes doing hahaha!!!
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