If any of you found my other thread you will know that I recently had a FSZE engine put in my car. To get the most out of it I installed the FSZE intake manifold as well. This is when things started going wrong...
Whenever I am driving and I put the car in neutral and let the revs drop completely, they drop too far. They will go to the 200 - 600 rpm range and then jump back up to a normal steady idle. It does this without fail now. My normal idle is perfectly fine. It's only when the revs drop.
The only time my idle does go crazy is when I completely fill my gas tank. The first time I start the engine it immediately wants to die. It will not stay alive without feeding it some gas. Once I drive it for a couple of minutes everything is fine again.
I'm really not sure if the two problems are caused by the same issue. The second problems seems like more of an EVAP issue.
As stated above I have the FSZE intake manifold installed. Brand new gasket was used. I also have a throttle body spacer, properly sealed with two new gaskets. I used the throttle body off my old manifold, so I know it worked fine previously. I did THOROUGHLY clean it with throttle body cleaner. I also installed new spark plugs. I forget the model number, but they are the "long reach" plugs compared to factory. I also only use premium 91 octane fuel. Sadly the car will not throw a code for any of this. I have driven over 700 miles with the issues, but nothing has triggered.
Whenever I am driving and I put the car in neutral and let the revs drop completely, they drop too far. They will go to the 200 - 600 rpm range and then jump back up to a normal steady idle. It does this without fail now. My normal idle is perfectly fine. It's only when the revs drop.
The only time my idle does go crazy is when I completely fill my gas tank. The first time I start the engine it immediately wants to die. It will not stay alive without feeding it some gas. Once I drive it for a couple of minutes everything is fine again.
I'm really not sure if the two problems are caused by the same issue. The second problems seems like more of an EVAP issue.
As stated above I have the FSZE intake manifold installed. Brand new gasket was used. I also have a throttle body spacer, properly sealed with two new gaskets. I used the throttle body off my old manifold, so I know it worked fine previously. I did THOROUGHLY clean it with throttle body cleaner. I also installed new spark plugs. I forget the model number, but they are the "long reach" plugs compared to factory. I also only use premium 91 octane fuel. Sadly the car will not throw a code for any of this. I have driven over 700 miles with the issues, but nothing has triggered.