A couple of problems with my RX-7 :(

[wiggman2030]

Hello all,

I recently bought a 3rd generation 1992 rx7, it\'s completely stock and to my knowledge has not had any mods performed in the past.  I also believe that the car has recently had a rebuild. Basically i\'m having the following problems:

1) When I accelerate everything seems fine, up to about 4,500rpm.  I check the boost gauge and as I accelerate it reaches 10psi, then once I hit around 4,500rpm the car slows down and I lose boost like the second turbo isn\'t kicking in.

2) On a cold start the car gives out white smoke from the exhaust for around 20 seconds, during this time the car seems to shake/vibrate.  Once the car is warm the vibrating stops and the smoke disappears.

I also thought that I\'d mention my vacuum is around 17-18 on the boost gauge once idling when the engine is warm. Also I am a bit of a noob when it comes to rotary but very willing to learn so any help would be appreciated.

Thanks

[Jono FD3]

First thing to do is check the plugs, as this will give you a poor start & lumpy idle as it might be running on one rotor for a few seconds till the second lot clear themselves! as for the boost, this is a common problem, but could be caused by many dfferent things!!!

I had a similar issue & it turned out to be the boost controle soonoid on the front of the UIM, but it could also be a split hose in the rats nest, duff solonoid in the rats nest, broken one way valve, faulty actuators on the second turbo, boost controle actuator on the Y pipe, or even a nackerd turbo!!

Jono