My man Scotty, my 1998 Nissan Altima is constantly showing a misfire in cylinder 1. I failed my smog check back in January, and found out that there was a little bit of oil leaking into the cylinder. I put in a new seal and new spark plug put in, and the misfire code came back after just putting 20 miles on. I got an extension for my smog to last until March 8th, and well, I'm kind of screwed now. I have brought my car back to the same smog repair guy for the past 2 weeks. He tested everything out, the spark plug, EGR valve, everything that is emissions related, and has said that everything is fine. He's tested everything and said that everything is acting like they should. Last week, he replaced the fuel injection system after testing the fuel pressure. It was perfect when the car was running, but when you turned it off the was no pressure at all. So, he told me that there has to be some pressure when you turn off the car. So he replaced that with a brand new part. After putting 60 miles on my car, the misfire finally came back on. I brought it back to him and he said that the fuel injector in cylinder 1 looked bad, so he replaced that. He told me to put 91 octane, drive 100 miles, and then come back for the smog. But now, the misfire code came back after 20 miles. I don't have the money to buy any car at all right now. Do you have any idea what it could be? Sorry for the long essay, I'm just extremely desperate right now. Thank you! :)

Comments (2)
No. 1-2
BrokeGuy
BrokeGuy

I called the mechanic and asked him. He said the head gasket is not going bad because he tested the compression and is showing that it's fine. Should I test it out myself? And thank you for responding. :)

ScottyKilmer
ScottyKilmer

Editor

classic signs of a head gasket starting to blow, check that with a wet and dry compression test of the engine and a block leak test