1.9 rocker questions

**ROTTMAN** · 04-06-2009

Installed the 1.9's on Saturday. Over the last few days my car seems to be pulling harder especially between 4500-6000 rpm. Why would performance improve over 3 days of driving? Does the pcm adjust itself to this mod? I have an overkill pcm and Will said I would not have to send it back after I did the rockers. Also, would the exhaust change after this because it seems alot deeper now...

**blueguy** · 04-06-2009

Well the PCM has to adjust still for the difference in air movement...so it might have been learning...don't know what else it could be...maybe it will just keep getting faster and faster and FASTER

LOL

**FoSHO99** · 04-06-2009

pcm adjusts, relearn fuel trims and what did you have to eat the last few days? Maybe your butt dyno is off! lol jk

**ROTTMAN** · 04-06-2009

lol thanks...maybe its my wishful thinking

**04CompG** · 04-06-2009

i've heard but never verified that our pcm's have Adaptive Learning. Give it a week or so to determine your driving style and adjust for it.

**blowfishRus6** · 04-07-2009

if the pcm was reset due to battery being unpluged, then yea there will be an adjustment period. 3 days is pretty good tho, after 3 days mine is getting back to normal. after a week its faster then what i started with.

my exhuast also sounds a little throater at wot after rockers.

**Bio248** · 04-07-2009

any valve train mods will make the car faster regardless of the tune.

**blowfishRus6** · 04-07-2009

it made my car faster. only thing was my pcm was reset so it took awhile for it to get things straight again.

**UR LOSN** · 04-07-2009

I believe it adjusts itself up to 5% of where the Air/fuel mixture should be.....

so in essence....it learns!

**blueguy** · 04-08-2009

GTP A.I.

**2000GTP** · 04-08-2009

i want some rockers.

**Bio248** · 04-08-2009

ill be selling mine in fall/winter when i go cam'd.

**blowfishRus6** · 04-08-2009

we just came out of winter...

**Bio248** · 04-08-2009

...and? lol

**blowfishRus6** · 04-08-2009

ha.

**blueguy** · 04-09-2009

For sale

**ryangtp89** · 04-09-2009

can't wait to get my 1.9 rockers and 105# springs installed!!! Right after installing them i gotta get my pcm tuned instead of keeping the crappy zzp 1.0 pcm.