Who ported/rebuilt the engine? How big of a port does the engine have? I know that a stock ecu can comfortably idle some ported engines, as I ported my intake ports when I rebuilt my engine, while leaving my exhaust stock. I put the stock ecu in the other day when troublshooting some problems I was having with the AEM, and it idles just fine.
I agree that you should check the engine's compression, just for good measure. Also, check to see that your injector plugs are securely on the injectors. Make sure to check the routing of the spark plug wires as well. And if you know anyone in the area who has a PFC that you could put in your car for a few minutes, then put it in, and go to the sensor check screen. If anything is off, then you know to check it. And for the love of God, get that damned precat out of the car.

 

My car idle fine (street port, 3"dp, and stock ECU)
but it did smell like there was a fuel leak somewhere but I looked but couldn't fine it.. and then I installed a PFC and the fuel smell stopped.. I am assuming that it was running super rich..

Flipn

 

Is the O2 sensor hooked up and is it good?

Also, what about all the grounds all over the engine? Have you checked to make sure they are good?

STEPHEN

 

yeah, goofy should know. he's had a lot of both in these years w/ his rx7's and the customers in his shop.

 

Sorry if you did this already, but make sure the plug wires from the center coil go to the plugs that are closest to the ground, and that the coils to the left and right go to the plugs that are closest to the sky.

-Max

 

This thread is pretty old. Steves car runs fine now i believe. I saw him last week, looks all good.

 

What was the verdict??

 

I never understand why people make up threads asking for questions to never follow up on how they fixed the problems.

UPDATE people!!! Inquiring minds want to know. Oh ****, did I just show my age???

 

check vac line that goes to the stock boost sensor...mine came off and the car had a rough idol

 

I have run 2 of my fds with streetports on stock ecu. One was a mild port the other pretty aggressive(what I was told by previous owner) I have never run into a problem with a port and stock ecu. One of the cars has intake,dpipe,catback,and streetport with the restrictor pills pulled so the car only hits 8lbs of boost the other with the large streetport has just a downpipe and they both run great. I have a hard time believing it is the ecu. However it never hurts to check.

Edit: I am an idiot. I didnt realize the problem is already solved. Oh well.

 

He plug in the Power FC and all his problems went away.

 

ok, so sorry for not "updating"...I figured that this thread would never get dug up for some reason, and if it did, other posts on my progress with problems would help tell people that my car is now running well. Anyhow, I have solved all the problems that my car has, and I think it was due to the ECU. I had XS engineering put a Power FC in, and tune it for reliability, to just get everything running properly. I could potentially squeeze a lot more power out of my port and current setup, but if I'm going to be driving this thing everyday, and want to get on it a little bit, I want to take the best possible route that I can towards extending motor life rather than risking possibly running lean, or overheating for any reasons.

The cooling fans are now turning on for some reason, idle issues are fixed, no more hesitation at 3k, boost is clean, 10 lbs. all the way through, sometimes up in the 12 lb. range if I really get on it. The only problem that seems to still be a bit of a hassle is the start up at mid to cool temperatures. If I drive my car for say, 20 minutes, turn it off then come back to it when its on its way towards cooling off completely but not entirely stone cold, (i.e. stock temp gauge sits low, but not all the way down) starting the motor is tricky. The car pulls the idle up like it would if it was cold, then kills it if I don't stay on the gas. This occurs only momentarily however, as once I keep the RPM's up and keep it moving at a parking lot speed, this problem vanishes within 5 seconds of driving. No biggie so far.

I thought it was so many other things, but it just turns out that I needed a computer to fix it. Its interesting to me that some people have been able to run the stock ECU with no problems on a port. This makes me question other problems that the car is having outside of the ECU, and whether the Power FC compensates for these issues, whether mechanical or electrical. I would love to hear other suggestions if you think my situation can be further improved.

Thanks for filling in for me saburo, I know u know how my car is running...u've seen it in all its living color.

 

Glad that you fixed your problems, so congrats! and thank you for the update

 

i would re-ground everything under the hood.