Ok guys I've hit a wall here. Things started a few weeks ago with my 99' 4runner 2.7L. I will try and post this as close to chronological as possible.
started out getting a cel for a TPS malfunction, and ended up replacing the sensor which fixed a "sticky" gas pedal from idle. all was well for about a week and then I got another light. checked that and it was reading "excessive egr flow", so I started out as cheap as I could. I cleaned the entire throttle body, IAC, and EGR valve pretty damn clean. everything back together and she's idles with a faint skip from time to time and on acceleration bucks from 1000-2500 ish rpms randomly.
Ive received two other codes. One shortly after I cleaned everything for Insufficient EGR flow, system running lean, and another for MAF circuit malfunction.
I proceeded to clean the MAF, but noticed it was pretty corroded so I just replaced it thinking that might be the problem. The girl has about 147k on her so I just went ahead and did a tune since its been about time and replaced plugs, wires, and did the fuel filter as well thinking it might be a starvation problem.
Everythings connected great, clean and there are no leaks. I'm basically looking to see if anyone has any input on where to go next. I think I'm down to it either being bank 1 o2 sensor (recently replaced bank 2), cat, coil packs, or an injector problem, but all are now staying on the expensive side (especially after buying a MAF sensor). The truck isn't throwing any more codes and is still running awful.
I'm curious if there are any typical failures in these motors that i might be able to check and whats the best way to check them.
I've also put a bottle of fuel injector cleaner in the tank and haven't seen any changes (not that that rules out injectors, but just for info.)
and to be clear, when I step on the gas it won't buck, but most of the time will feel like its bogged down until it downshifts, and then it will run fine at high rpms.
hope that was detailed enough. I appreciate everyones help!
started out getting a cel for a TPS malfunction, and ended up replacing the sensor which fixed a "sticky" gas pedal from idle. all was well for about a week and then I got another light. checked that and it was reading "excessive egr flow", so I started out as cheap as I could. I cleaned the entire throttle body, IAC, and EGR valve pretty damn clean. everything back together and she's idles with a faint skip from time to time and on acceleration bucks from 1000-2500 ish rpms randomly.
Ive received two other codes. One shortly after I cleaned everything for Insufficient EGR flow, system running lean, and another for MAF circuit malfunction.
I proceeded to clean the MAF, but noticed it was pretty corroded so I just replaced it thinking that might be the problem. The girl has about 147k on her so I just went ahead and did a tune since its been about time and replaced plugs, wires, and did the fuel filter as well thinking it might be a starvation problem.
Everythings connected great, clean and there are no leaks. I'm basically looking to see if anyone has any input on where to go next. I think I'm down to it either being bank 1 o2 sensor (recently replaced bank 2), cat, coil packs, or an injector problem, but all are now staying on the expensive side (especially after buying a MAF sensor). The truck isn't throwing any more codes and is still running awful.
I'm curious if there are any typical failures in these motors that i might be able to check and whats the best way to check them.
I've also put a bottle of fuel injector cleaner in the tank and haven't seen any changes (not that that rules out injectors, but just for info.)
and to be clear, when I step on the gas it won't buck, but most of the time will feel like its bogged down until it downshifts, and then it will run fine at high rpms.
hope that was detailed enough. I appreciate everyones help!
