Map2 ECU

[VR4WGN]

can anyolne back this up or add to it as im really in 2 frames of minds now as to what to do!!! i have both ecu's aswell as 7201's

[scott.mohekey]

The 7202's are flashable. Boost levels, as well as fuel cut can be changed as well as the full ignition and fueling maps. I can't say whether there is any features the map2 has that the 7202 can't do, but the majority of the reasons for getting a map2 are now doable with stock ecus. 7201s need special work (NJ can help here), 7202s and 7203s can be flashed with an OpenPort 2.0 cable and EcuFlash.

[wintertidenz]

Get a 7202 flashed, the driveability from what I've read will be much better than what you will get with a Map-2 tricking the ECU with fuelling etc.

Only disadvantage to keeping the 7202 will be retaining the MAF, the Map-2 will allow you to change to a MAP sensor and remove the MAF entirely.

[scott.mohekey]

I vaguely recall reading somewhere that the stock ecu's either have MAP support in them, or could be made to work with MAPs somehow. This is a very vague recollection though..

However, I also recall Turbo_Steve saying that MAF is far better than MAP anyway.

[Nutter_John]

Scott they have sorted this on EVO's ( it's called speed density ) but thats a lot of coding which hasn't been done on the vr4

[wintertidenz]

NJ - since our ECU's, particularly the 7202, are similar to the Evos, there's no reason why the code can't be adapted for ours

[scott.mohekey]

Entirely possible, but not as easy as taking their modifications and applying them to our ecus. We need to disassemble and understand ours first to learn where similar functionality is.

[VR4WGN]

Interesting boys . Some smart cookies here please keep them comming in I'm very interested

[scott.mohekey]

Q, I will be flashing 7202s and 7203s before long. I'm just waiting for the various parts to arrive and then I will start learning what's involved with my car as well as a couple of volunteers down here. We'll be making very conservative changes initially.

[Adam.Findlay]

If a map coding is added i am intrested i would like to do away with the maf and have a similar induction setup to bradc, tidy and effective

[VR4WGN]

wel lcmon Scotty boy,theres MONEY to be made here.. otherwise whom in thw UK or AU does it? i will consider sendign it to you guys....Map2 Goes in on Monday,cas has bee nrunning sick as a dog..

when flooring it she is still spiking 1st-3rd upto .8 bar and 4th upward spikes to 1.2 and backs down to .4 or so... and when flooring it it feels almost as if the car is jolting abd boosts and jolts a bit and boosts thats if it does not hit boost or fuel cut,but im running everything stock in it,7202 ecu bla bla bla
any recommendations??
tried AFM and relay on firewall,no difference..

how or where do i buy new oxy sensor?

[Turbo_Steve]

That won't be your Oxy sensor - more likely to be something not right with the crank or cam signals from the sound of things.

[scott.mohekey]

Putting a Map2 on there isn't going to help. It sounds like something is wrong. The best thing you can do is identify what it is, and fix it. As Steve says, it sounds like it could be crank or cam angle sensors. Have you checked the alignment of the timing belt even?

[VR4WGN]

Will do that on Monday and hopfully it'll fix thinxs then??

[scott.mohekey]

Does it have a boost controller? If it doesn't, is the stock boost control solenoid plumbed in properly? It almost sounds like it has no boost control and the waste gates are just not opening at all.

[VR4WGN]

now i think your onto something,but then again why only over boosting in 4th n 5th??

and evrything is stock in the engine bay now amn,even intercooler

[scott.mohekey]

I'm not sure why it would only be doing it in 4th and 5th. I would start by double checking the waste gate and boost solenoid plumbing.

[VR4WGN]

hmmm,dramas... maby i shud drop the engine and go through evrything and replace new... and then i can do clutch and lifters at the same time maby...

[blade8]

i came across this problem with a slightly earlier v6 vr4 after doing a clutch on it. it was either something to do with spark or vacuum. have been trying to remember since you took use for a ride on saturday

[VR4WGN]

yea im leaning more toward boost or actuator now,but its hard to tel lwich 1 untill i drop the engine,still toying the idea of dropping it out starting tomorrow...or wether to wait a bit