Which lines are the most common to crack and create a bumpy idle? I keep getting check engine lights of large evap leak. Any ideas?

 

Have the code scaned at auto zone for free and then post it up here and people can help better. Check the vacline going to the combination valve. It sits on the top back of the motor against the fire wall.That will throw a code for sure.

 

p0455 or soemthing like that

 

anyone got any advice?

 

Check the hose thats connected under the intake mani and goes to the dv. then check the hose that goes from the mani to the EGR, then the one that goes from the mani to the FPR, and the one that is at the front of the mani.

 

+1 for that. I have a leak in the one that goes under the mani to the DV it it just frayed from rubbing.buy some vac line and replace them if you can

 

Chances are that you need to replace all your vac lines. I would buy 15ft of silicon line along with a handful of screw clamps and replace all lines. It should only take about 60min of your time and you wont have to worry about it for quit a while. Once the stock line is brittleit will crack as soon as you squeeze it.