Evo8 ECU in a 1G DSM in the works!
Quick bit of curiosity here. Have any of you noticed this discussion and do you have any thoughts on it? These posts are from the evo8 ecu in a 2g discussion on dsmtuners
I ask because I'm trying to determine if this is worthwhile on my 2g, and then also if the effects on 1gs are enough that it should affect whether I go with the evo8 ecu or Jackal.
Had a bunch of codes pop up and went in and disabled all the emissions related items since they weren't hooked up. I've got two codes left, want to guess which two? P0335 and P0340. I know why these codes pop up. I've dealt with these codes on many occasions on the 3G. These codes will be triggered when the cam reluctor wheel is not correct for the ECU. The car will run fine but the codes are triggered due to the ECU not being able to properly sync the cam sensor. What the cam sensor tells it as home (tdc 1) is not right and pops the code. On the 3G, this is easily fixed by putting in the proper reluctor wheel.
For you 97+ guys the fix should be easy. Grab the reluctor wheel from an EVO 8 and call it a day. Yes I know the reluctor is on the exhaust cam on the VIII vs the intake cam on the 2G. However if you check the waveforms produced by the two reluctors you will see the difference. They are almost identical but the 2nd pulse is of a longer duration on the EVO.
However since I'm a 6 bolt I don't have the option. I have to run the cas because I have no crank sensor. The only thing I can think of at this point is a custom wheel. Sure I could run a EDM ROM since it doesn't have the code to verify proper sync... But that's the whole point. IT'S NOT SYNCED.
So now I guess I'm going to have to have a custom wheel made for my CAS. Joy. All this so I can sell the car with it running properly.
However, this should get you guys running properly w/o the P0335 / P0340 codes.
edit: CYLINDER,CAMSHAFT POSIT [Part# MD375814] It's a $12 part at mitsparts.com. I have a client coming in w/ a '98 GSX in the next week or two for an EVO VIII ECU swap and I have multiple spare reluctors at my shop so I'll test my theory on his car and report back. 95% sure this is a fix for those codes on an USDM ROM.
For you 97+ guys the fix should be easy. Grab the reluctor wheel from an EVO 8 and call it a day. Yes I know the reluctor is on the exhaust cam on the VIII vs the intake cam on the 2G. However if you check the waveforms produced by the two reluctors you will see the difference. They are almost identical but the 2nd pulse is of a longer duration on the EVO.
However since I'm a 6 bolt I don't have the option. I have to run the cas because I have no crank sensor. The only thing I can think of at this point is a custom wheel. Sure I could run a EDM ROM since it doesn't have the code to verify proper sync... But that's the whole point. IT'S NOT SYNCED.
So now I guess I'm going to have to have a custom wheel made for my CAS. Joy. All this so I can sell the car with it running properly.
However, this should get you guys running properly w/o the P0335 / P0340 codes.
edit: CYLINDER,CAMSHAFT POSIT [Part# MD375814] It's a $12 part at mitsparts.com. I have a client coming in w/ a '98 GSX in the next week or two for an EVO VIII ECU swap and I have multiple spare reluctors at my shop so I'll test my theory on his car and report back. 95% sure this is a fix for those codes on an USDM ROM.
Us with 3g's often swap the reluctor wheels in order to get rid of the CEL codes that are thrown when swapping older engines into a newer car (ie: a 2002 3.5L engine into a 2005 eclipse). This not only gets rid of the CEL but also solves the timing issue that comes along with the swap.
When the ECU is expecting 3 small pulses and 1 large pulse off of the ruluctor wheel on the cam position sensor but in turn sees 1 small pulse and 1 large pulse (again because of the reluctor wheel on the cam position sensor) two bad things will happen. First and worst thing... timing will not be where it should be (sure your logs will say "x" amount of advanced timing but in reality not the case)... not only will timing not be where it should be, occasionally timing will bounce around (in my 3g, my ecu constantly shifted timing around even when cruising at steady rates). Second, and not as bad of an issue, you'll throw a CEL (check engine light or SES light which ever you wanna call it).
Just thought i'd share some info with ya'll...
When the ECU is expecting 3 small pulses and 1 large pulse off of the ruluctor wheel on the cam position sensor but in turn sees 1 small pulse and 1 large pulse (again because of the reluctor wheel on the cam position sensor) two bad things will happen. First and worst thing... timing will not be where it should be (sure your logs will say "x" amount of advanced timing but in reality not the case)... not only will timing not be where it should be, occasionally timing will bounce around (in my 3g, my ecu constantly shifted timing around even when cruising at steady rates). Second, and not as bad of an issue, you'll throw a CEL (check engine light or SES light which ever you wanna call it).
Just thought i'd share some info with ya'll...
Newbie
Joined: Nov 2010
Posts: 1
Likes: 0
From: Phoenix, AZ
I just wanted to get some clarification here on a couple things. After reading this whole thread, I am real interested in starting to get into this. My questions though would be about the components I can swap into the 1G (awd) from the Evo 8/9 that would benefit me and work easily with the ECU swap. For example, If i were to swap out the MAF, injectors, FPR from an EVO 8 and a fuel pump from an EVO 9 (no pressure relief) Would this make it easier to tune and utilize the ECU with seemingly stock componants? Not to mention be a great upgrade for the stock 1G car? (with fine tuning of course)
If planning to run speed density, which pins do you use for the MAP sensor? I see the pin for the MDP (which is differential pressure), but what about for absolute pressure? Same pin on the Evo ecu or somewhere else?
Newbie
Joined: Sep 2009
Posts: 44
Likes: 0
From: A-TOWN!!
lol. Can guys actually successfully using the Ev8 ecu conversavions chime in?? Thanks
For me the big issues are the difference in logging speeds and logging software. Jackal has its own logging software but it isn't any faster than any other 1g logging and I haven't ever played with it to see if I would like it more than, or even nearly as much as evoscan. After that comes the size of the maps. I would be find with stock evo sized maps because I certainly don't require big maps but the stock 1g maps are tiny, and I don't know if Jackal has changed this or not, or if there is a load limitation for the ecu and logger. If there is I suspect it has been taken care of much like in the evo ecu but if I use the evo ecu at least I know what is available and what isn't.
Cost will be a concern as well. I haven't bothered to see if I already have an eprom ecu but that will likely be one of my major decision point because I wont want to spend the money for a new one, and if I do have an eprom ecu I might still be tempted to sell it and have a bit of cash left over even after an evo ecu swap. Tuning both of my cars with one cable and software is a boon as well.
Cost will be a concern as well. I haven't bothered to see if I already have an eprom ecu but that will likely be one of my major decision point because I wont want to spend the money for a new one, and if I do have an eprom ecu I might still be tempted to sell it and have a bit of cash left over even after an evo ecu swap. Tuning both of my cars with one cable and software is a boon as well.