My 5sfte Build. . . Almost There!, I am finishing up my 5sfte build. I have a few tuning issues. HELP&# Options

[HardHead93]

I am finally getting close to finishing my 5sfte build. I started it in mid December a have all the parts in the car and working as of today. Here is what I started with. It was a stock 5sfe with a KO Racing performance header and a K&N stock air box filter.



When I first put the turbo in, I used one of those tubular exhaust manifolds. Yea. . . They are not very good. It got too hot and caused the bolts to loosen and unthread. It also made the engine compartment so hot that anything plastic under the hood began to melt. Finally, the boost did not kit in until close to 4000 RPMs. Here is a picture of that set up.



I took out that tubular manifold and got one off a 3sgte. To give it a nice new look, I used high temperature ceramic paint and gave it a new aluminum look. After 4 months of work and a couple of snags I now have a 5sfte with the following:

5sfte
T3/T04E Turbo
Turbosmart Wastegate w/7 psi spring
2.5 inch Magnaflow full exhaust
AEM FIC Piggyback
SSQV Blow Off Valve
460cc RX-7 Injectors
FMIC
Walpro 255 Fuel Pump
3sgte 3 Bar MAP Sensor
Glowshift Gauges (Boost, A/F Ratio, Oil Pressure, Voltage)
12" Slim radiator fans
Oil Filter relocation w/oil cooler
Manual Boost Controller

Here is a picture of my set up.



Front mount intercooler:





Glowshift gauges:



If is wasn't for the forums on 6gc.net, I would not have had the confidence to jump into a project like this. Now the tuning begins.

I like the AEM FIC tuning software. It is very user friendly. The only problem I am running into is I am trying to figure out the MAP Sensor table. Every time the car boosts (around 2500-2800 RPM) it runs great until I hit about 5-6 psi, then the car begins to stutter, starts running real lean (17 to 18's A/F Ratio), and then I get a MAP Sensor CEL. It looks like the ECU is not happy with the voltages coming from the MAP sensor under boost. What do I need to do to fix this issue?

I only plan to run 8-10 psi of boost because anything more than that and I will need a new clutch and have to start replacing engine internals. I plan to do a full engine rebuild with a stage 2 clutch and beefed up internals in about 6 months, right now I am just trying to have a little fun and learn about the engine in the process.

[Smaay]

did you intercept the MAP signal for the FIC? I never ran into this issue.

[HardHead93]

did you intercept the MAP signal for the FIC? I never ran into this issue.

Yes I did intercept the MAP signal. I think I set my voltage clamp too high. I had it set at 5.2V, because the Chilton manual said that the sensor peaks out at 5.5V. I just lowered the clamp to 4.5V, I hope that works. Do you have any suggestions on setting the O2 map table? I think I have my fuel and timing about right.

[klue]

The FIC I used had its own map sensor built in. 5.2v is to high for a map clamp, here is a simple way to find out what your max voltage is. Get one of those brake pump things, set it up to put out pressure. Apply pressure to the map sensor and take the voltage reading. Probably 4.8 ish, then set your clamp to that

[HardHead93]

The FIC I used had its own map sensor built in. 5.2v is to high for a map clamp, here is a simple way to find out what your max voltage is. Get one of those brake pump things, set it up to put out pressure. Apply pressure to the map sensor and take the voltage reading. Probably 4.8 ish, then set your clamp to that

Should I be using the 3sgte MAP sensor or the stock 5sfe one because the AEM FIC has its own MAP sensor?

[klue]

You should be using the FIC map sensor, make sure you put a filter on it. Ive had one or two blow from a good intake backfire

The map clamp limits the voltage coming out of the stock sensor so that you dont have issues like check engine light. The FIC will still make its fuel corrections as its seeing the correct pressure

[Smaay]

The FIC I used had its own map sensor built in. 5.2v is to high for a map clamp, here is a simple way to find out what your max voltage is. Get one of those brake pump things, set it up to put out pressure. Apply pressure to the map sensor and take the voltage reading. Probably 4.8 ish, then set your clamp to that

Should I be using the 3sgte MAP sensor or the stock 5sfe one because the AEM FIC has its own MAP sensor?

you need to be using both. the 5S-FE needs to be used for the ECU. its scaled correct for the 5S-FE ECU you need to use the internal FIC MAP sensor for tuning the FIC

do not use a 3S-GTE MAP sensor