Hey all. Heres the scoop. I have an jdm 7mgte stuffed into an 85 toyota pickup. I bought it from a guy who did the swap, then the engine died and he sold it to me. It ran when I bought it but had 2 cracked pistons so I didn't run it long...just wanted to be sure it did. So I rebuilt the engine, and now I'm having some issues. I've been driving it for about 14xxxkm. I've searched high and low all over the internet and can't find the anwsers so I figured its about time I finally started a thread of my own. For mods, as far as I know of, the engine internals are stock, it has a 3inch exhaust from the turbo back (not including the elbow) with apexi muff, k&n filter, top mount subaru intercooler with hard piping (no room for front mount) hks ssqv bov, electric fan, apexi safc, autometer wideband with new sensor. No egr (blocked off), Probally a few other things too. The turbo was rebuilt at the same time the engine was. As far as I know of it has stock injectors.
Its running very lean at idle. (wideband tops out at 16.2 and thats where it sits) It will barely run when at stock settings so I have to use the safc to tune it to driveable limits. I have it tuned up to %50 correction and its still lean off the wideband. The weird thing is that its lean untill I hit 2000rpm (seems to be exactly 2000rpm) and then its fine from there and above. It gets rich under boost but that seems normal.
4-5 times last fall when idiling to let the turbo cool down, its like something electronic connected and the problem fixed itself (caused me to go rich because of the safc tuning but whatever) so that leads me to think its something electronic but I have no idea what it could be. After I tried cleaning my afm and had to get a new one, it hasn't happened since.
I have an adjustable fuel pressure gauge and its sitting at 36psi. I've turned it up to 70psi with no change in the afr. I put in a new o2 sensor and afm so I know thats not the problem. The timing is set to 10 btdc (with the jumper wire in) and the cam gears are aligned perfectly with the little marks on the backing plate. At idle I'm pulling 20in of vaccum. My throttle plate is completly closing and the tps is set according to the tsrm.
I really hope someone can help me out as this is driving me crazy. I'm pulling a knock sensor code which turns on the CEL at 10in of vac and I believe 51.
Its running very lean at idle. (wideband tops out at 16.2 and thats where it sits) It will barely run when at stock settings so I have to use the safc to tune it to driveable limits. I have it tuned up to %50 correction and its still lean off the wideband. The weird thing is that its lean untill I hit 2000rpm (seems to be exactly 2000rpm) and then its fine from there and above. It gets rich under boost but that seems normal.
4-5 times last fall when idiling to let the turbo cool down, its like something electronic connected and the problem fixed itself (caused me to go rich because of the safc tuning but whatever) so that leads me to think its something electronic but I have no idea what it could be. After I tried cleaning my afm and had to get a new one, it hasn't happened since.
I have an adjustable fuel pressure gauge and its sitting at 36psi. I've turned it up to 70psi with no change in the afr. I put in a new o2 sensor and afm so I know thats not the problem. The timing is set to 10 btdc (with the jumper wire in) and the cam gears are aligned perfectly with the little marks on the backing plate. At idle I'm pulling 20in of vaccum. My throttle plate is completly closing and the tps is set according to the tsrm.
I really hope someone can help me out as this is driving me crazy. I'm pulling a knock sensor code which turns on the CEL at 10in of vac and I believe 51.
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