Changing the Timing on Stock SR20

Char · Nov 29th, 2005, 02:43 AM

I know this has been posted repeatedly.. I did a search for it and found How to, but its left me with more questions.

I have a 1995 Nissan 200SX SE-R almost at 148K miles, everything stock.

First about putting it in Timing Mode. I have to warm up the car, then when Im ready Rev it past 3K three times, then disconnect the TPS, correct? And this whole time leave the car running?

Second about what to put it to. My mechanic did it for me before. It says on the sticker on the hood and acording to what it was running at.. stock is 10 degress. We set it to 13 and I want to now put it at 15. But from what I read stock should be 15 and it should run best at 19 with 91 octane (currently using 93). So now Im just all types of confused. Should I put it to 19 and continue to run 93, will that would give me the best gas milage and performance?

Also I have a missfire on Cyl 1, as far as we can tell its a bad injector, but it happens rarely. Ive had no problems with it so far, it doesnt seem to be causing any damage, but we have yet to pull out the injector to look at it. Weve checked everything else and thats all it seems it could be. With that being the case, would incressing the timing cause any more damage if Im still having the missfire?

Harris · Nov 29th, 2005, 01:16 PM

Ignition timing procedure:

http://www.se-r.net/engine/about_tim...s%20it%20done?

Stock ignition timing range for an SR20 is 15 +/- 2 degrees BTDC. You can take it as far up as 17 BTDC while using 87 octane. So if you go any higher than 17 degress, you'll have to use premium gas.

And yes, I'd try to take care of the misfire problem first before doing any of this.

Char · Nov 29th, 2005, 01:27 PM

Mine was on 10 anyway... now on 13. We didnt know how to put it in Timing mode that time, so I dont know if that was messing with it, I forget if he disconnected the TPS too, I believe he did. Anyway, I will talk to him today, put it in timing mode and set it to 15 being thats what it should be stock. Thanks for the help.

Also since I might as well ask now, what would be a good place to find a replacement injector? I havent bothered calling any of the parts places yet to get prices.