kcjohnnyboy

i have a 99 gsr with a greddy turbo kit. coverted to obd1 with p28 chrome. while at idle it has a slight misfire. could it be the base map? need help please

LVB18Civic

its most likely the base map. my car didn't run worth a **** when it had a base map. Get it tuned asap.

0mtber

iTrader: (2)

1. Have the car tuned
2. Make sure you are running the proper spark plugs gapped to the proper gap.

kcjohnnyboy

whats the gap on the spark plugs before i go get it tuned please?

Turbo-LS

iTrader: (4)

What plugs are you running? you should start with a gap of 27 and if they blow out then drop to a 25. Make sure your running the proper heat range. What turbo is the greddy? 14g 16g 18g ??

kcjohnnyboy

14g running the ngk 2 step cold plugs

Turbo-LS

iTrader: (4)

so thats a 7 plug right? that should be fine what boost do you plan on running? id say that the misfire is from the basemap. bring a set of 8 plusg with you just in case because if you crank up th eboost on that 14g the intake temps could rise a little and that plug might not be cold enough but try them first

kcjohnnyboy

thanks man i'm bout to get it tune

Turbo-LS

iTrader: (4)

Not a problem, good luck with it

Post up the results

sirguy01

i have misfire in my car too... gapped 25, i hear its normal though.. especially with a cat and 1000cc injectors... i've read they are the hardest to get to idle.. 14.2 is my idle now.

Turbo-LS

iTrader: (4)

My car idle beautifully on 1000cc's but pegged rich LOL

sirguy01

lol that think must have stunk... im still trying to get the fine tunning done properly... stupid thing misfires when cruising sometimes... and the people behind me get scared and switch lanes.

wat engine managment are you using?

Turbo-LS

iTrader: (4)

AEM EMS, I dont like the fuel adjustments. The hondata you can put miliseconds the aem only goes so low and not by miliseconds so it wont let me tune it any leaner at idle. it doesnt really smell with the thermal hooked up. but open dp ist nasty. LOL

Yeah when i was tunign my buddies delsol it was rich up top and when he shifts sounds liek a grenade going off with the open dp, people get scared on the highway next to him. we raced a kid and he was liek wtf i thought your engine blew up HAHAHA thats on the S300 with precision 1000cc's. were able to get it to idle beautifully and in the 13's is where he likes it but it will go all th eway to 16's at idle and stall

sirguy01

weird im using an aem ems.. and i didn't have that issue. im gonna try to get my tuner to lean it out a bit more... i've also read somewhere where the FI motors are most happy at mid 13's...

coulda been and stupid post though.. if i could get it to 14's i would but tunning soo much time and money...

B18 CYA

ur making 447whp at 10.5psi on a gt35r? hmmm

OBRJosh

ask your tuner how the hell he did that because i cant get it to not pegg my uego rich. oh well it idles fine and doesnt foul plugs and its never really at idle anyhow. i treat it like i did my banshee. start it up warm it up and hammer the snot out of it HAHAHAHA

sirguy01

yea man i was suprised to see it too... im running a tial 38mm wastegate and we are scared to up the boost anymore cuz the wastegate i dont think will hold.


so we have my turbosmart manual boost controller at 0 clicks and it supposed to but 9psi.. but my spring is holding it steady at 10.5 We got a couple runs were we were at 11psi.. but that was with one click of the boost controller.


I'll ask him how he managed to.. he's a aem guru so i'm sure there are tons of ways around it. I'm also using the aem injector driver.