Ok guys I've had a time with this car/engine. I got the car without a engine and a 1991 JDM engine. The car is a 88. Anyways I stuck with the 88 wiring cause I didn't have a 91 cpu. So I wired everything and didn't have a AFM so I got one from a junk yard for a NA car.
The ran ran very rich at idle and wouldn't crank over 3000 rpm...flooding it out. I wrote to you guys and some people suggested I can't adjust a NA AFM to work so I got a AFM from another alltrac user. I ended up with the exact same issue.
Only thing fuel wise that I know of is I installed a walbro 255. At the time I assumed the engine had stock injectors.
So after two failed attempts I said screw it I bought me a DIYPNP and stuck everything together. So I now have my diypnp with a Wideband and purchased the tuner studio software for autotune.
Anyways so I pulled a base tune from MSPNP.com and theres a 3sgte MR2 base map. After inserting that the car started right up and once again rich so I selected the whole map and scaled it down till my idle was decent. Once again tried reving and again spudders out and my wideband quickly goes to 9.0.
So the last 3 days I've been slowly leaning this out and trying to not make to big of steps but I've gotten to this point where it seems it just doesn't like 4500 rpm.
Now if I rev it and get it just right I can get up into the 5000 to 7000 range but I just dont like free reving that high but I've been there a little and it's mixture from what I can tell isn't bad...12.5 or so.
Only thing I can come up with is either fuel, or ignition. For those who have wired one up. I don't know if it matters or not but I'm using G2 Instead of G1 for my VR2 input
Last edited by outinnowhere3193
on Tue Nov 11, 2014 12:25 am, edited 1 time in total.