Total Noob Seeking his Obiwan

[workingdog]

I'm about to load HP Tuner onto my laptop so that I can diagnose a couple of problems on a 6.0liter conversion in a '66 LandCruiser. I'm wondering if there's anyone in the north bay area around Santa Rosa that might be will to offer a helping hand with getting me going.

I need to upgrade the ECM for 36 lb injectors and debug some bucking and/or 'dropping out' it's doing where the O2 sensors (as seen on OBD ii gauge) go to 0 and the trims go to max. Does it for a fraction of a second or a couple of seconds, then it's fine. Happens totally randomly.

These problems have been present since I got it back from conversion. They thought it was a fuel pressure problem, but I don't think that's what it is. I'm hoping HP Tuner will showing me something the ODB ii guage is missing.

Peter

[mcfarlnd]

You can eliminate the fuel pressure question by just hooking a pressure gauge up to it. I use an electronic sensor from flea bay and log it in my scanner. I too had issues when I swapped my motor in the 61. Chased my tail for about a week until I hooked up my pressure gauge and found it dropping to 20 psi..... found that the braided teflon line had been kinked at some point and was cutting off my fuel flow.