So I have a 99 tacoma, with a 3.4. I noticed it was running rough upon start up, lacked power, would buck if I tried to drive it. But after it warmed up was fine. This has grown into a major loss of power to where I am crawling up hills. If the engine is warm, I can floor it, the engine will bog and then accelerate, and as it revs the actual power will fluctuate greatly. As the RPMs increase the exaust pops/sputter and backfires. The truck is barley drivable.
So.... no codes are thrown, spark plugs and wires are good, 02 sensor tested good, I cleaned the MAF sensor. I don't get it...if there were a misfire there would be a code, if a sensor was bad there would be a code....WTF? I am about to test the voltage from the TPS. I have yet to put a fuel pressure gauge on it, which will be my next step.
Any advise???? I need to have my truck back up and running as it is my DD, and I can't take it to a shop since I make shit for money. HELP