Yes! This is what I was thinking, though I was remembering my car did a very similar thing after I rebuilt the engine. Started up and purred like a kitten, I was SO happy....until I went to take it for a quick spin, and it ran like ****. Pulled the ECU code and it said 'fuel pump' (can't remember the exact code now...there was a thread on it way back then) and what had happened was when I first went to start my car I had pulled the fuel pump fuse so I could pre-lube the engine by cranking it and not wanting it to fire up. Once I had done this I reinstalled the fuse and it started right up, but...the ECU had seen no fuel pressure so it put the car into limp mode. Reset the ECU and it was perfect.

 

What Scanner works best with finding the codes?

 

I beleive american cars have a CEL light on the dashboard (Check Engine Light) that flashes out the codes. all you need to do is bridge a connection in the diagnostic box under the bonnet.. please read this it explains

http://www.rx7city.com/ecucodes.htm

 

Gafu....When u get a chance hit me up.

 

I got no luck there. The codes I got were for the EGR valve which isn't there anymore. The Air pump that isnt the there anymore. and I wish I had the list wit me but there is some more Solenoids that came up. I'm gonna go with either a Power FC or Haltech or Microtech cuz there is just no way getting around this without that.I know that alot of people have the Power FC and My friend recommends it but if I can get a Haltech for about $400-500 would it be better? Or stick with getting an PFC? I was also reading some other posts and does the Supra fuel pump work better or should I go with somethine else like aeromotive? Would these be good things once I put the PFC on?

Thanx Again for all your wisdom and Knowledge.

 

I want to make the right choice for my car and I would like to know what you guys prefer for the fuel management/ECU. Go wit the Power FC or if I find a haltech or Microtech cheaper should I do that?

 

You need to find someone who can tune the car and talk to them about what they can and can't tune so you don't make the wrong choice buying a ecu that your tuner cant tune. A lot of us run the apexi PowerFC including me, I love it!

 

You really should take your car to a rotary specialist to have them look it over. You should break in the motor, should not be trying to hammer the throttle in any way! Should be taking it easy for around 1000 miles. Who ever did the work on your car I wouldn't let them touch it. You ported the motor, turbo back exhaust, and removed all emissions. Due to the emissions being removed, the modifications, and the ecu throwing codes, you do need a computer now.

 

Ok...Does tuning vary in prices from each individual person or is there an average for it? I think I am going with the PowerFC cuz there is nothing but good talk about it. I don't hammer the throttle, it's just that it won't rev fast at all...I have to feather it to get higher than 2,000RPM

 

I am glad you don't hammer the throttle. Ok good, you made your choice of what ECU you will be using. With the base map you should be fine since you won't be pushing any kind of boost. Around 1000 miles you can/should get it tuned. A lot of people say 1000 miles is good for break in. You should talk to the person who will be doing the tuning about that though.

https://www.rx7club.com/se-rx-7-forum-35/official-shop-list-florida-389268/

There is the link that contains rotary specific shops in Florida. In NJ the price I have paid is 350$, you could make a post in the SE section https://www.rx7club.com/se-rx-7-forum-35/ and ask who they think is the best and also price.

 

i had the same problem. it was the connection to my ECU from one of the harnesses. it took me forever to figure out. i have a PFC, so i was able to move it around with the kick panel cover off and it solved my problem for a minute until i moved it the wrong way. what i had to do was bunch the wires up on the back side of the PFC (side facing the fender) and install the kick panel so there was pressure on the harness which kept it in the right position for it to work properly. try unbolting your ECU from the kick panel and move it around while you rev the engine. if it makes a difference u know where the problem is.

i still never figured out what wire was causing the problem, anybody have any ideas? i'd like to fix this prolem once and for all

 

Now the car runs like a Champ and Boosts hard....I Love It. Thanx for all the Help. Now I just got to tune it properly and be on my way. Thanx Again.

 

That means you had/have a sensor problem. It's just that it's one the PFC ignores.

 

Is that a bad thing?

 

That depends on what the "real" problem is/was.

 

The Problem was that the car did not want to go into boost. It would not REV past 2500 RPM unless u slowly made it creep. I could hardly move the car without it wanting to shut off. Now that I put the PFC on it boost right up with a lil lag around 2500-3000 RPM and revs right up after that.

 

I know what your "symptoms" were, but the "problem" was never found. It's possible that it was a bad ECU, or a possibly a sensor problem. The PFC doesn't use all the sensors in the same way the stock ECU did. For instance, if it was your knock sensor causing the issue, the PFC only reports on it; it doesn't really do anything else where as the stock ECU would actually retard the car if there was excess knock.

 

Oh Ok. Very True I did put all my symptoms be4 and the problem was never found but I do see what U mean. Thanx for clearing that one up Mahjik. Well it doesn't seem that anything is wrong wit the car at this point. Starts right up and goes now. I still have to find a place here in FL at least close to Tampa where I could get it tuned properly by an Rx7 Specialist.

Thanx again for clearing that one up. This is my 1st FD and I'm new to all this.

 

i think what mahjik is trying to point out, is that without knowing what the actual problem was and resolving it, (if it needs resolved) that running the car on the power fc as though everything is alright might not be wise.

If your car is having a problem and the power fc ignores it without compensating maybe you will have bigger problems. Problems that the stock ecu was trying to prevent.

It could have been one of the turbo control solenoids, maybe with the conversion they were discarded and wont they put the car in limp mode?

 

I will call and ask the guy who did my Motor if he messed with the Turbo Control Solenoids. I havent been driving the car except for down the street after the PFC was installed. Have not taken it newhere else cuz I took the insurance off of it. I will check again for those things and look for a shop that I could take it to where they could check my car out.

Thanx