Originally Posted By: gotnogunk
Yes this is exactly what happens. Sorry for my ignorance but what is a DFPE sensor and where is it located. THANKS
Typically you dont have DPFE sensors in Toyota engines. A DPFE sensor is used to determining how far an EGR valve is opened, by putting a orifice in the exhaust supply tube, and measuring pressure drop between the 2 sides of that orifice. Usually what Toyota does is put an EGT sensor upstream and downstream of the EGR valve, and measure temperature change.
Anyway, do you know the age of your spark plugs and wires? Also, a 1997 Toyota 1MZ-FE engine may have special spark plugs, and should only be replaced with what Toyota recommends. My dad would get 60,000 miles from those odd spark plugs in his Lexus ES300.
When did you last clean the throttle body and MAF? Those easily cause a problem.
Is the PCV valve original, or has it been replaced? It can cause the engine to run poorly if it hangs open. Expect the grommet to be brittle, and require replacement when the PCV valve is replaced. I only recommend OEM PCV valves and grommets.
Got any vacuum leaks? Hopefully you don't. Typically if your car is that age, plastic vacuum devices will shatter, even if you cut the old hose in half and peel it away from the plastic part.