peck1270

I was out running some errands today and hopped on the interstate to head home. I hammered it from a dead stop on the on ramp and I only got 7 psi below 4500. After that the boost fell to 5 psi and held steady. I babied the car the rest of the way home and once stopped in the garage I could smell fuel big time from under the hood. Preliminary check with a flashlight reveals nothing. Maybe a vacuum line, check valve, or solenoid is the culprit for the boost problem...no idea about the fuel odor. Any idea????

Want2race

first get a fire extinguiser!

then do you have any lack of smootheness? If so you may have a broken fuel pressure regulator!

Flybye

ACtually, the fuel pulsation dampner is the most common component to fail, and its a BIG pain in the *** to reach. It's on the back of one of the fuel rails, end EVERYTHING (upper intake, solenoids rack, air bypass valve, fuel rail) must be removed to get to it. The BEST thing for you to do is first remove the upper intake and pressurize the fuel system to see where the leak is comming from.

Do NOT drive the FD like this. The FPS, if it IS that, is located on the side of the engine where the exhaust is. IF enough of a fuel pool is there, it could always ignite.

Flybye

Oh, after you fix the fuel problem, then we can worry about the boost issue

peck1270

Thanks for the info. Any thoughts on the boost problems I listed??

peck1270

How should I pressurize the fuel system? Would turning the key to the on position accomplish this?

Flybye

It could be a BUNCH of things. A blown vacuum hose, a killed solenoid, a failed actuator, etc. Your best bet would be to first check ALL of your vacuum hoses to ensure they are connected and have no slits in them.

Flybye

If you have the stock ECU, no.

The diagnosis connector next to the battery, there are 2 connectors you can bridge together which will turn on the fuel pump to pressurize the fuel system. Problem is that I'm at work, and I don't have the info with me or the correct site that also tells you how to do it.

Do a search for RX 7 FILES on google. A web site SHOULD come up called scuderiani something or other. In there, is the information on how to do it. Otherwise, just wait till I get home and I will post up the info for ya.

peck1270

I appreciate the help. I'll be waiting. I want to try to look into the problem this weekend.

Flybye

Here's the site that explains how to perssuresize the fuel system.

Oh, don't mind the fuel filter replacement instructions that are in the middle :p

http://www.scuderiaciriani.com/rx7/fuel_filter.html

migamb

I think just about everyone that owns an FD at some point can relate to the seconday boost problem since it is the most common. In my case it was several things. CRV and CRA actuator hoses on the inside on the manifold had popped out, a stud got into the primary turbo and ate the wheel up, The WG actuator lost the c clip and the arm came loose causing it to stay open which caused low boost this happened several times. It can be tons of stuff, do a search I remember when I was having problems I found a thread that was very helpful.

peck1270

Thanks for all the replies and information. I have plenty of stuff to check out at this point. Hopefully this weekend I can get started to rule some of the stuff out. I am going to order some vacuum hoses today so I can tackle that job while I have the whole thing apart. I have already done it once so maybe it is just a loose vacuum line. The fuel smell is what is really bothering me. Any opinions on the hose type to use? Last time I used Goodyear rubber tubing but I had doubts about it after the job was done.

Flybye

You asking about the fuel hose or vacuum hose?

Vacuum - Any good quality silicone hose with THICK walls will be good.

Fuel - Any FUEL INJECTION hose will do.

peck1270

Hey guys,
If you are looking at the engine (standing in front of the car) which solenoid does the connector that has the white marking on it go onto? The left or the right? These solenoids are bolted onto the front of the manifold.

Flybye

The one with the white marking should go on the right. It is your wastegate control solenoid