Cold Start Problem Only

Hendrick301 · Post by **Hendrick301** » Sun Mar 30, 2008 1:39 pm

Well the car starts fine, but then after about a min, the idle goes up and down almost stalling untill the car reaches operating tempature. If i fiddle with the idle timing and the cold start it changes it but i still cant get it quite right.

anyone seen this?

Fusion Ed · Post by **Fusion Ed** » Mon Mar 31, 2008 10:33 am

load a fresh map then change over the fuel, ignition maf and K value and see if it still does it.

r31_gav · Post by **r31_gav** » Tue Apr 01, 2008 2:02 pm

yeah i had the same problem with my skyline, cas problem with the gear inside the cam and vacuum hose for me. reran the vacuum hoses and replaced the exhaust cam and fixed

Hendrick301 · Post by **Hendrick301** » Tue Apr 01, 2008 2:10 pm

its wierd. once the temp reads 50 it acts up on the dot every time then goes away at 70.

so basically starts fine, runs like crap after a min with a loopy idle vac gauge reads -21 rythemically moving to -15 and back untill the coolent gauge reads 1/2 way. then a study -21

im getting some dyno time next week.

Hendrick301 · Post by **Hendrick301** » Fri Apr 04, 2008 12:11 am

The 02 sensor goes crazy .2 to 1 volt until the car warms up then its fine...