My car has just been to zedworld and is running perfect, Jeff had some work to do on it, its been on the conzult and everything is spot on but when its cold the revs can still be a bit eratic and when i press the accelerator a touch the revs will drop a bit then pick up again and when i come to a junction and press in the clutch the revs will increase to about 2000rpm and then settle again, my car has had a new wiring loom, also when its cold at about 2000rpm i get a serge of power, could that just be the tubs kicking in? If im going down a hill in 3rd with my foot off the gas, i can hear a very slight popping noise from the exhaust, could this just be the jwt 555 chip i have installed? Or is this all normal for a moddified z?

popping sound will be overfueling so its unburnt fuel being thrown out the back!Fuel mixture probably too rich when not on throttle and not leaning out enough on your map!

 

When cold car is in a Warm-up Enrichment mode so throwing gallons of fuel through so is probably resulting in your power surge at 2000. Sounds early for turbos especially if you have larger ones installed!

 

Best bet it to check you dont have a tiny air leak and clean out your throttle bodies and idle air valve! Be surprised how much muck you can get in them!

popping sound will be overfueling so its unburnt fuel being thrown out the back!Fuel mixture probably too rich when not on throttle and not leaning out enough on your map!

 

When cold car is in a Warm-up Enrichment mode so throwing gallons of fuel through so is probably resulting in your power surge at 2000. Sounds early for turbos especially if you have larger ones installed!

 

Best bet it to check you dont have a tiny air leak and clean out your throttle bodies and idle air valve! Be surprised how much muck you can get in them!

 

Ive cleaned the throttle boddies, is there a thread somewhere on how to clean the idle air valve? Would it be worth me having a custom map done?

Ive cleaned the throttle boddies, is there a thread somewhere on how to clean the idle air valve? ?

 

sure is bud http://home.swipnet.se/e-solutions/IdleTech.html

:D