I'm so tired of the lost of drivability after my 272 cam and ECU flash.

It's been 3 weeks without my car and I'm so miserable

I've asked people alot of questions on this forum and so many of you have been great help and advice but now I'm stuck and don't know what to do next.

Right after my 272s and ECU flash I lost all drivability of my car, I've called many tuners, shops and the forum about what to do about my car.

Most people on this forum have 272 cam shafts and they are fine, even getting a stock idle with them.

Most people told me to ditch my vented to atmosphere blow off valve... I did, results are improved but not alot.. the car no longer throws a CEL atleast for today, I drove my car around town twice stalling out maybe 6-8 times.

I even bought adj. cam gears setted them at -4, -1.5.. this got rid of my lope idle but sometimes I get the lopey idle and sometimes I don't which is wierd.

Car feels as tho It's running very rich from the scent of exhaust fumes.

Before I got cam gears and recirculated my BOV I had 4 check engine lights... Inactive 02 Sensor, Bank1 too lean, Airflow voltage low, and the dreaded Engine Misfire code. Before the cam shafts and ECU flash I never had 1 check engine light nor did my car run bad at all with a vented BOV. I'm no longer getting any of those lights but I haven't driven enough to actuallly find out if I get them more or not but as soon as I get it, I erase them. The most frequent CEL is Bank1 System too Lean, the Misfire code I've gotten twice, Airflow voltage low twice, and Inactive 02 sensor only once.

I've done everything I could at this point and don't know where I should go from now. Maybe another ECU flash? I feel as if the cam shafts are causing all these problems but I don't want to get rid of my 272s, I love the power gain and lopey idle. I just cannot stand stalling out everything I park or reverse! Won't this cause my starter to go sometime soon if I keep it up driving like this.

My new BOV Greddy Type RS, still flutters a lot, I didn't modify anything on the BOV, just recirculated it. Got rid of my Vented set up. BTW This BOV flutters and sounds like crap. I didn't adjust the screw on it much beside 1 notch both ways to see if that changes anything.. really doesn't make much of a different but I've gotten replies to a past post that the RS doesn't require single spring mod as with the Type S.

Thanks for reading my long story

 

Re-flash, set the cams at -2/-2. put your stock airbox back on, My MAF screwed up and caused the RICH mode you are talking about! It would be in a "limp-home" state. Go to the dealership, and have them plug in your MAF sensor. I bet it is bad. my 2c.

 

Have you tried/check these things:

1) Just put on a stock BOV for the sake of ease and reassurance
2) Replace the plugs with a cheap set of BPR7ES and/or BPR8ES
3) Your O2 sensor may have gone bad (not sure how to check this)
4) Re-install stock intake/airbox
5) Is your MAF plug securely connected?

 

I had the 272's, they were fine, the 280's are fine also. I will bet you a starbucks your MAF sensor is the culprit!!!!!!!! get it checked, and report back! My 272's were fine until for some reason my "cone" intake and my RMR intake pipe didnt get along with the MAF. I changed it all back, and since then, NO PROBLEMS! of course I had to get a NEW mass airflow sensor!

 

Spark plugs sound like a cheap way to troubleshoot, since I'm now broke. Along with trying the stock diverter valve

I know the MAF sensor is plugged in securely... the front 02 sensor looks fine, I took a look under the valve cover and it looked fine.

If the MAF sensor went bad... how would I check that?... there's not a specific CEL for that is there?

I don't think my MAF sensor is bad tho... I mean I've had another car that's MAF sensored and went it went bad on that car.. the car wouldnt even move... my car drives ok... little stumbling/bogging alot of fluttering.


I know mustang you've tried so many different cam profiles and I'm sure I can have my 272's with my car running fine...

The most frequent CEL I get is bank1 system too lean

 

Clean the MAF sensor and try the new plugs, best of luck and hope you get it all sorted out soon. How much vacume do you have at idle? I am at about 10

with my 272's, stock cam gears, and ECU flash. My car seems to hate Reversing into a parking spot. I have stalled it a few times that way.

 

are you sure you didn't get the cam timing off a tooth or two when installing the cams?

 

Damn, that's a very good question. I forgot to ask about that. I've never heard of these symptoms following a cam install other than when being off a tooth or two.

 

this may sound stupid but how would I check that... I mean visually the cam gears look fine.

 

Cam gear off a tooth good question! can you put the cams in wrong? ie intake over at exhaust? My car ran, but stalled at lights, etc when My MAF went bad! check it by going to the Mitshubishi dealership, and tell them to check it. They just plug it in, and read the Mud?Atmospheric something or other, They should check it for free! just takes a second! Hang tight evo08buoy, we'll help you figure this out! How long after the cam install has this been going on? With the flash, make sure it was done, and done according to your mods!!! RESEND in your ECU. could it be your SAFC? I had the flash (RMR) and tried to hook up an SAFC, and Rhys Millen told me NO!!!! dont connect both, as they do the same thing. maybe you dont need the SAFC, just stick with the ECU flash? Pm me your ph#, I can put you in contact with some great Mechanics to help you troubleshoot your prob.

 

maybe the exhaust cam shaft positioning sensor pickup was installed 180 degrees out????

 

The above tips are excelent but you need to be a little more specific on it's behavior for them to help you troubleshoot - a boost leak combined with a lope may behave like that.

Except for the stalling and idle, exactly how bad is your car running, like when you accelerate does it feel like a 150hp dog? Can you boost? Does it backfire?

Was the cams the very last item installed befor the problems for sure, did you install them (so you would know if they are off time) if they are off then your car would be waaaay of.

The easiest way to rule out a MAFS would be to swap one out with someone else w/t an evo, it would take 10 min w/t the intake you have.

Give us more clues, but like stated earlier, it sounds like something with the cam installation for there is plenty that can go wrong with that procedure - about 7 electrical connectors, timing, trigger position, plug harness, etc.

 

I'm very pleased with all the replies!

Before camshaft install and ECU flash no problems on my car at all, The cams were installed by a pro shop who installed cams over 300times or something like that... So I'm very well convinced that the installation is not a problem.

After the cam install, My car cannot drive without stalling out, The idle dips down to 600-400-100 RPMS almost every single time I stop the car and even when it's just idling it dips every few mins. I've been getting numerous CEL's ever since also, Inactive 02 sensor only once and never showed up again, but it never showed up by itself. P0171 sys too lean b1 is the most frequent code I'm getting, P0102 Airflow signal voltage low is another occasional one as with the good old p0300 misfire detected.

Now by a local and very trusted shop thats 5 mins down the street from my house helped me install my cam gears and ditch my vented BOV for a recirculating one. We set my cam gears to -4/-1.5... this sort of got rid of the lopey idle which I really don't mind anyway just hoping it will help my car not stall out.

I'm so sure I can run my 272's as a daily driver because so many people here on this forum have great success with them.

After I installed my recirculating Greddy Type RS BOV.. I thought it was going to fix my problem.. but nope.. I didn't adjust the screw that much on it or did I do the single spring mod... but people say the new type RS doesn't require single spring mod.

I can give feedback on what happens after boost leak test, changing spark plugs, and trying to put my stock diverter back in.

I hope that best describes what you guys think will help me... The suggestions really help out alot.. at this point I'm clueless and if this never fixes... I'll have to settle changing 272s for 264s.. something I really don't want to do.

 

This might be relevant.. the Greddy RS recirculated flutters alot.. to rid myself of the fluttering should I single spring mod it or adjust the screw so the spring is more stiff? I think the cams is causing my BOV to open at idle possibly even at very low RPMS where the turbo shouldn't be kicking in the BOV flutters.

Also same results with or without S AFC installed.. do you guys think I should change my cam gear settings...

Smoked you told me -2/-2.. you think this is a good idea?

 

Cam timing still sounds like the culprit. Maybe they adjusted your gears incorrectly? You can try 0/0 and time off of TDC. You can also turn up your idle to help with the car stalling issue--I'd recommend the HKS EIDS. $100 part and 1 hour to install. Well worth it. The Apexi SAFC-II functionality that is supposed to be like the EIDS does not work with our cars.

This is probably not attributable to the BOV, (not that its not possible)

Spark plugs are still a good thing to check, on top of that, make sure they are gapped correctly. There are tons of threads discussing gap options.

Airflow signal voltage error could be the SAFC if your not set to Karman. Double check your SAFC setup/config.

Also double check your connections on the wiring harness, might be loose.

I have SAFC and a flash, I just changed my SAFC settings back to 0/0 and run as if its a gauge at this point. Should be useful for a dyno tuning session though.