I got 90 hb w/ first gen sir complete swap and when I let it sit for like a long time and go to start it up it starts but in the process it boggs real bad then wam up to 2grand untill the motor warms up once it starts warming up it goes to normal idle like arond 800rpms...

anybody know what could cause this? its happens inthe mornings and when I let my car site for like more than 2hrs.

 

damn shyt moves quick tonight

 

mine does that too, but the rpm drops really fast. so iunno
but yeha its goes up to 2 grand. and than back down
i always thought it was the moisture or something in the garage...iunno