my car was runnning fine when i decided i wanted more !!!!!

So I ordered up some cosworth cams and springs an fp red and some 800 cc injectors (have NOT installed injectors yet )

so i installed the cams and springs go to drive the car and wham limp mode p1238 witch makes no sense to me to have a mass air code

so i ordered a new mass sensor while wating for the sensor to come in today i went ahead and installed the fp red get everything done
car back on the ground go for a ride wham p1238 again


anyone have any ideas what going on here

As of right now im running turbotrix hard pipes and intake
UR full turbo back exhaust
avcr installed but boost sensor not hooked up yet (still Running stock ecu boost)
cosworth cams and springs
FP Red
50/50 water meth
ecutech tune
now the tune im running is for everything but the cams and turbo
could this be my issue??? right now im going for retune on the 7th of march
but if this is not my problem i need to get it fixed before i go to dynoformance for it is a 7 hour drive

if it is a tunning issue then ill park the car tell next week when it get retunned


any thoughts would be great thx

 

Your problem is most likely in the tune. Your sucking alot more air through the mass air flow now so all the limits in the air flow maps need to be adjusted. With your previous ecutek tune you were probably close to the limits in the tables already. Now with the added parts you are over the limits

 

Tune.

 

that makes sense...im not sure how the airflow tables are setup with the ECUtek,but i just went for a quick ride in the car and the limp mode activated under lite/partial throttle(it even happens in deceleration)....so i dont think its getting too much more air.(the car has yet to go over 50% throttle)

_Stone

 

also,before the cam and turbo install the car was throwing a ASC code:C121C under WOT,now it is throwing the code under partial throttle as well as the P1238 code.

any more input guys,i would like to know if this is anything we can fix before we trailor the car 7 hours to GA to get tuned.

_Stone

 

After your retune tell us how everything is.I would like to know how much stronger your car is.I am also interested in buying some cams.I also want to know how much higher your rpms are going to be.

 

Wow...

Why would you try to run that turbo and those cams without a proper tune? Do you not understand how cars work? Good Lord...

 

No doubt.

 

If you would read the post the car is set up to get retuned i only drove it around the block to make sure it was ready to go for the retune and it went in limp mode

there is no plans to drive the car tell the tune is done
Im just trying to make sure the tune will fix the problem that it has and that its not something else

 

I’m disappointed with you guys don’t give advice if you’re not going to give good advice. first the turbo won’t cause a problem if you’re running stock boost. The ecu doesn’t give a **** what turbo you install it’s not going to magically crap out even if you install a gt35 xxlbs is xxlbs. Turbos are categorized by boost potential and efficiency (just so you know). By installing the red and running stock boost the only thing that could have changed is spool time which the ecu can compensate for perfectly with no problems. If you reach boost sooner than the ecu will add fuel and pull timing sooner vice versa. It's when you start adding boost is where you run into problem either by running the ecu out of it maps or by maxing out sensors which ever happens first. When it comes to your cams it’s a whole new story here’s the thing by getting bigger cams you change V.E. (volumetric efficiency, theoretical percentage of air entering the engine by the max theoretical amount of air that can enter the engine) this is more of a problem on map based system since its base off a fixed V.E. map and cant compensate for changes in V.E. but since the evo is also maf based and can also measure air flow it can compensate for your cams up to an extent before the sensor maxes out. Error codes 9 times out of 10 doesn’t just mean it’s the sensor its self usually it’s a code meaning something in the entire circuit is bad It can be bad power, ground, signal, or sensor so no more wasting money on parts if you’re not sure what the problem is okay, lol. I’ll tell you how to test your maf sensor I believe the evo runs MAF/IAT you can tell by the amount of wires MAF uses just three MAF/IAT Usually runs five two powers two signals and a common ground but I’ve seen different variations, I believe the evo run a five wire so make sure your testing the maf not the IAT. To start unplug the sensor using a DVOM (digital volt ohm meter) measure continuity to ground on the plug (harness side) around .2 ohm is okay the higher the number the worse it is start worrying when it above .6 ohms to much resistance will give you a bad “signal” reading to the ecu. You can check resistance across the maf by measuring between the signal and ground, and the power and ground on the sensor make sure its unplugged this is a must (cross reference the readings between the two maf sensors because I can’t tell you what the manufacture recommendations are) next plug the sensor in start the car. Test the voltage going into the sensor (this is called you reference voltage) I believe the evo runs a 5 volt reference just to make sure check it at the map sensor they use the same voltage if it’s a five volt reference then the ref. if it a 5 vlot ref. sytem the maf ref. should read 5volts or close if not i can also cause a bad signal as well. last check the signal voltage, car still running while idling the voltage will be very low blip the throttle the voltage should go up in relation to the throttle if you steadily give more and more throttle the voltage will climb steadily but usually tends to taper down some if you give it a lot of throttle and hold it the voltage will jump a lot but usually drop when you hold it. If your sensor maxes usually around 4.5volts with a little variation on the 4.5volts but you still have plenty of throttle left then it’s the cams. You can fix these problems with a little know how if you need help on the diagnosis or fixing the problem let me know I’ll be glad to help you out.

 

dude, pay attention. He's already got a tune SO HE'S NOT ON STOCK BOOST PRESSURE. I bet he's getting the partial throttle overboost condition.

And buy a freaking paragraph.

 

I don't think he has anything to worry about, but you are wrong, stock boost isn't stock boost on a different turbo. You are flowing way more air into the engine. Why do you think people upgrade their turbos and run less boost than they were running on their stock turbo's and make more power? Because bigger turbo's push more air, so at a lower psi you are still feeding more air in. It's not a difficult concept.

 

THAT is the biggest misconception

1bar is 1bar .. CFM remains the same .. only difference is the 1bar is more efficient on the bigger turbo .. ie cooler .. plus bigger turbo can flow more efficiently at higher boost .. thats where you make dramatically more than stock turbo

Its the tune .. get that done and OP should be fine ..

And to the IX owner .. the current car is not as simple as the older evos in terms of ECU tuning .. and you seriously need to learn paragraphing ..

The source of airflow is not only on the MAF .. it is referenced to MAP too .. these 2 must agree otherwise you get a CEL ..

 

READ you silly person


i understand that,BUT...the problems were happining before the FP red install(it started after the cams were installed at the dealership,SHHHHH) i understand that cams bring more air in,but no other evo X owners that have installed these cams have the same problems....maybe it was the previous Dyn4mance tune that is causing the CEL

really,i was under the impression that PSI was all the same no matter what turbo,but bigger turbos flow greater CFMs...

and you are right about the MAP and MAF...im thinking that is the problem,but i am not fimiliar with ECUtek...can this be tuned out???



ONCE AGAIN,THE CAR WENT INTO LIMP MODE AFTER THE CAM INSTALL,NOT THE FP RED INSTALL

 

If the tune adjusted the mivec (which most do), then you can be doing all sorts of weird things with the cams.

I'd get retuned and then see what happens.

From Gunzo:
https://www.evolutionm.net/forums/6475663-post12.html

Your tune is likely right on the bleeding edge. Changing the cams likely pushed you over the edge... if you have a MBC, back it way down and see if that helps.