The UIM is on tight. Last month I installed the Turbo Control Solenoid (TCS), therefore, I had to remove the UIM for TCS replacement. The car was boosting 9-5-6 before the new TCS. It boosted 9-7-8 after the install. A few weeks ago I installed a Pettit DP. The car the jumped to a 10-7-8 boost pattern and it's been that wat since...???

 

Whatever the problem is, before you go and fix it you should get a cat and replace the midpipe temporarily. You don't want to fix the problem and then while testing to see if what your boost is at wot hit a 15 or 16 psi spike... the engine is gone in that case.

 

moehler: Makes sense to me!! Thanks.

 

Isnt the boost patern 10-12-10 on stock anyways?

 

Would a dirty, clogged fuel filter have any part in how an FD engine's boost is affected??? Just brain-storming...

 

Yes, its quite easy to change and remove so it would be something to do just for the hell of it if its time to.

 

The fuel filter is NOT easy to remove. Gas can go all over the place. It is time consuming.

Stock boost pattern should be 10-8-10.

Please don't give people advice if you don't know.


You probably have a bad coupler on your y-pipe. You need a boost controller before you install the efini y-pipe. With your mods, you could easily boost/spike over 16 psi after installing the y-pipe.

Many people like the profec b boost controller. If you don't want to spend the money, install a manual boost controller. Info here:

http://www.rx7turboturbo.com/robrobi...controller.htm

Do not install the prespool controller.

 

No, it's 10-8-10.

 

No, how would a fuel filter affect boost? The only thing a clogged filter could cause is fuel starvation = detonation = blown engine.

 

rynberg: Well I asked about the potential clogged fuel filter problem (low boost causation) because it's kind of like having something obstruct the foot pedal from being pressed all the way down towards the floor board. If it ain't all the way down, you're not really opening up at WOT, therefore, the boost is not going to measure at it's maximum potential. Yes?? Maybe Not!!

 

adam c ; I think you're right. I'll look into the Profec B. Thanks.

 

areX - I see what you are getting at, but that's not how it works. If the accelerator pedal was obstructed from going the full way down, then the throttle plates wouldn't be fully open. The engine isn't recieving full airflow. With a clogged fuel filter and WOT the engine is still getting full airflow, but not full fuel flow. You'd still get all the air/boost, but not all the fuel and BOOM!

 

1st to 3rd : Great explanation. Do you have any advise on my 10-7-8 boost pattern. Remember all my mods. Thanks.