derffred Posted October 28, 2008 Posted October 28, 2008 So, here's a small story. At 60K I replaced my spark plugs with NGK 1-Step Colder. And it seems ever since, I've been getting a Check Engine light every couple weeks with codes for a miss on Cylinders 2 and 4 (just the codes, the engine runs fine)... I pulled out the plugs, checked them, regapped them (they were okay) and put them back in. Meanwhile, I got my car tuned at Precision while this was going on. So my question is, since the CEL still comes on intermittently, and IF my injectors are no good, would I have to get a retune with the new OEM injectors? If they tuned my car with a "bad injector" and it ends up getting replaced, would it affect the A/F if I don't get it retuned?
Infamous1 Posted October 28, 2008 Posted October 28, 2008 What plugs did you use and where did you get them from?
LittleBlueGT Posted October 28, 2008 Posted October 28, 2008 So, here's a small story. At 60K I replaced my spark plugs with NGK 1-Step Colder. And it seems ever since, I've been getting a Check Engine light every couple weeks with codes for a miss on Cylinders 2 and 4 (just the codes, the engine runs fine)... I pulled out the plugs, checked them, regapped them (they were okay) and put them back in. Meanwhile, I got my car tuned at Precision while this was going on. So my question is, since the CEL still comes on intermittently, and IF my injectors are no good, would I have to get a retune with the new OEM injectors? If they tuned my car with a "bad injector" and it ends up getting replaced, would it affect the A/F if I don't get it retuned? If your car was tuned w/ a bad injector then you need to be retuned. FWIW I put in cleaned and flow balanced stock injectors in my car (originals were just fine), noticed no difference in learned AFR trims. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!!
derffred Posted October 28, 2008 Author Posted October 28, 2008 I used 1-Step Colder NGK from JSC-Speed's website. I pulled them out about a week before my tune to check the gap and they were okay. I also swapped my coils from 2&4 to 1&3
derffred Posted October 28, 2008 Author Posted October 28, 2008 When I was getting tuned, the tuner was having a hard time getting my LTFT and STFT in the right parameters, they took out my MAF and cleaned it and finally got them right after about 45 minutes.
Infamous1 Posted October 28, 2008 Posted October 28, 2008 If your car was tuned w/ a bad injector then you need to be retuned.
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