Hi guys, I've just fitted a front mount on my96 jdm wrx and it's running like a dog .drove 10/15 mins after fitting on small amounts of boost fine , gave its beans in 2nd gear off a roundabout and I had a major lack of boost and a triple backfire , Eml came on constantly.continued up the a road and realised it was in limp home mode. Got it back to my workshop checked codes and knock sensor showing , reset ecu and code still present . Removed knock sensor , cleaned up and doesn't seem to be any physical damage so re fitted and took out for a blast , eml flickers intermittently now and boost seems to have come back although very lumpy and still reading knock sensor after Ecu reset. I've ordered a new knock sensor, but is this just a coincidence or can a fmic play havoc with sensors etc because it drove fine without it.
Mods are ninja exhaust, decat centre section/ bel mouth down pipe,decat up pipe , hks mushroom filter , z4 with polar performance chip running 1.1 bar
Walbro pump,td05 turbo,

 

So presumably you fitted this without remapping afterwards?

 

Not a good idea to add bits to a subaru without a remap after(as above is pointing out).

 

Let me be the 2nd to

 

I don't believe it needs to be mapped for a front mount, the pp chip is set up for filter , exhaust and larger intercooler , I think all these these people throwing out the re map old chestnut are just following the masses, I've owned over 15 classics 3 bugs and a blob all had various exhaust ,filter , turbo & intercooler combinations with no remaps with never any issues and I rag the **** out my cars, I'm not saying they won't benefit from some kind of map but first thing I do it's smash that boost up , if it breaks so be it I don't care it's my car

 

This is surely trolling, no?

 

Ha ha I've never had one go bang yet , I don't listen to all the remap talk , if it starts , goes like a bat out of hell and then starts again the next day I'm happy . Classic Scooby can take all kinds of **** .the jecs Ecu is a gd bit of kit . Better that ****e newage scoobs

 

So are you asking for advice or stating that you seem to know it all?.

 

I've never personally fitted a front mount on any of my cars only upgraded top mounts of the cars I've bought already had them fitted . I don't want to get into the remap talk because I no it would not effect the drive to such a drastic change and I no a knock sensor changes the timing etc on detection of knock. With my tests I no a knock sensor will almost definitely cure the issue but was interested to see if anyone just chucked a fmic on and had any issues

 

Plus I no a fair bit �� Rebuilt a couple of ej20's with these fair hands

 

A front mount is nothing like replacing a top mount and will cause knock in cool weather.

Engine is not set up for it.

But youre a pro so crack on....

 

Disagree sorry

 

Each to their own but i am totally lost why someone with your enormous amount of knowledge about the subaru would have started this post as surely you know the answer.

 

Have you checked all the pipe connections? They're a sod for popping off under boost.
Also lowering the charge temps then I would think this increases the engines VE so would have thought the fuel and timing would need to be changed on WOT?
The classic ecu is good with fuel trims and knock correction but it does have its limits.

 

Being serious, I had the PP chip from Scott T back in the day, on my 1993 WRX. It drove really well, and you could really feel the extra 30-40bhp it gives. There was never any running issues or CEL/EML lights.

I do remember it allows for a filter change and exhaust (I just went the full decat exhaust route - everything else stock) - but don't recall it 'allowed' for a change to FMIC(?). Or for ANY different IC, for that matter. I might well be wrong, of course.

Don't forget, that the MAF sensor/ECU map was intended with the tiny slanty TMIC in place, so, as said - in cold weather at least - there may be significantly denser air getting into the engine after going through the FMIC, which the MAF originally won't have accounted for. Now, it may be that you're right, and the PP map's fueling DOES allow for it. But I'd be very wary, TBH. Esp. as, since you did the change, you had boost issues and it went into limp mode, etc.!

For me, that's all I need to know. But hey, that's only my insignificant opinion (that's meant genuinely BTW, and not sarcastically).

 

^^^ ossett's managed to relay what I was blathering on about in a far more concise form lol

 

Irrespective of front mount when knock sensor is constantly pulled off ecu when boost is not even achieved it's showing a problem with the sensor or another sensor related , may even be maf sensor possibly . There's no difference between a big *** top mount and a front mount and the classic ecu can learn to some extent to round off the edges. As I've said I've owned a few un mapped classics with front mounts fitted by a previous owners with no issues and I've run almost all my previous Scooby with full exhausts and filters standard wound boost up to a bar and abused them day in day out daily runners. My last one ran nearly 320 Bhp on the rollers with vf35 and Perrin headers, pinks, exhaust , filter and Walbro running a bar on Mbc with no remap within the safe zone , never went bang and I still see it hooning about locally

 

Do I detect sarcasm there lol , look it's Sunday night Bordem set in and I thought I'd start a debate because I no scoobynet is a fun place to be with objective opinions 😂

 

No problem and i am not mechanical so cannot be wound up LOL so carry on with your subaru mods.

 

Add parts to gain performance and don't remap we're the real gains are made
Doesn't make sense to be son

 

 

The stupidity in this thread is just funny as hell.

Take a mapped car add upgrade parts then dont have it mapped in #Priceless.

As above is this post seriously for real?? you ask for advice and then disagree and ignore the advice you are given?

 

I think the answer is here.

 

It's Halloween the clowns are out in force

 

+1