Recent content by tommyoquattro

the timing is perfect. ive checked it a few times. found somthing interesting when i took the plugs out to do a compression test. Bank 2 plugs were covered in carbon. bank 1 plugswere almost like new.. barely any deposits.. this is only with about 3 hours of run time and no miles... also when...

so i replaced all 6 injectors with a cleaned and flow tested set from ebay and there is absolutely no change in the way it runs.....:nono: im running out of ideas here.. im thinking i missed a ground somewhere. the only one i have is on the passenger side firewall to the head.. am i missing...

its not stubling really at all. no chech engine light even with both o2s unplugged which i thought was strange... just high idle and popping in the exhaust on accel.. i had my scanner hooked up while driving it last night and was watching the o2 and fuel trims. on light accel, not letting it...

diagnosis update: I wasnt able to rig up any kind of fuel pressure gauge but i did learn a few things from the scan tool... first the O2 sensor 1 is not switching like it should. it is staying around .450 volts and will drop some to about .250 when i rev it and when i close the throttle it...

Good to know. Well off for more diagnosis... wish me luck.

is the fuel pump supposed to prime with the key on engine off? should i have fuel pressure then? or only with it running?

So it most likely wont cause it to be running this rich where i get gunshots in the exhaust... whats weird to me is the popping on acceleration and not on decel like a rich motor ususally does...

yes i was thinking that too. the truck is hard to start. it takes 2 or 3 cranks to fire up like the injectors might be leaking down... i dont have a good way to check fuel pressure to be sure tho. there is no shrader valve and the manual shows using a banjo bolt fitting to tee into the rail...

i thought the FPR might have gotte damaged when i hooked it up wrong but i checked to see and the diaphram is not leaking or the vacuum line does not smell like fuel... Could a bad O2 cause it to run this rich with no check engine light?

so the story is I up a 96 4runner for cheap with a tired engine, buring lots of oil, low compression... So i ordered a rebuilt long block for it and i installed it over the weekend... first startup the engine would not idle ver well and died when the a/c was on. Idecide to clean out the idle...