Hey guys need help? bought my S about 3wks ago...2nd week cel came on. I thought I had a case of Bad fuel..maybe water in fuel tank, So I bought fuel injector cleaner. I did the cleaner 2 times, was still getting p1399,p0304,p0302. I waited on the injectors...tried to trouble-shoot sum more, this morning p1399,p0304,p0301. but the day before cel went off with out me clearing the codes den later came back p1399,p0304,p0302. This afternoon, cel went off again! the day before! came back only after a short drive. Today, I drove this whole afternoon n it hasn't come back! jus got my new injectors too! No CEL but wen hooked up scanner threw p1399,p0304,p0301!!! NO CEL!! confused! WIll see how tomorrow go before i put the injectors in. FYI valve adjustment have been done along with compression check n new cam shafts...any advice would be nice thanks

 

Have you googled the codes?

- Change Spark plugs
- Clean/Replace map sensor

that's where I would start. It appears that you're getting misfire on cylinder 1 and 4 only

 

wow - I had a hard time reading that with the wrong words used and missing words.

I hope you get it fixed.

 

Whiteflash, i've changed the plugs n did replaced IAT n Map as my fellow s2k required. G, Thanks I will try my best to resolve this issue.

 

p1399=pending
p0300=random misfire
p0301=misfire cyl. 1
p0302=misfire cyl. 2
p0303=misfire cyl. 3
p0304=misfire cyl. 4
read all my fellow s2ki forum

 

I just recently posted what happen to mine. Low compression in cylinder 1. I should of done the compression first. Before I bought the coils and injectors.

https://www.s2ki.com/forums/index.php?showtopic=768461

 

UpDate...after changing fuel injectors...no more cel n dtc...problem solve!..