sad running qx4

[Jonkstaceysr]

02 qx4 has new TPS,IACV,MAF it still sputters spits (gets codes 0506,0507) just runs awful,no power sounds like it is flooding or erratic fuel delivery,no or very slite fuel smell moisture coming out tail pipe but not raw, I am changing the Tps again, but could this be the ECM or something else

[atraudes]

I'm curious, when you replaced the TPS, did you calibrate it after installing, or just bolt it on? Check out the P0120 section in the FSM to see how to. It'll also tell you how to check the TPS with a multimeter to see if it's functioning properly before you buy a new one. I don't know that it's the cause, but it comes to mind because I remember what a pain it was to get it just right.

I don't think it's the ECM because normally when the IACV takes it out, the car won't idle at all. The ECM still could be the problem, but I wouldn't look there first.

Do you smell fuel in the exhaust after it's warmed up? You're supposed to when the engine's cold, but if you're smelling fuel when it's warm, then it could mean a leaking injector, malfunctioning coil packs (which should throw a code), a leaking fuel pressure regulator or damper, or a number of other things which would also cause driveability issues.

Before you do anything else, check to see if you have any vacuum leaks, disconnected hoses, or tears in the intake ducting. Move your head around the engine compartment and listen for hissing and flex the ducting around to see if you can find anything.

Did these problems arrive suddenly, or have they been coming about over time?

[Jonkstaceysr]

First problem truck would not start changed the TPS it started ran well for about 15 minutes or so closed hood and all that, then started it again and it would spit or bog when throttled but idled just fine p0102,1102 new MAF ran fine another 15 or so minutes then code p 0507,0508 ,0122,1122, new IACV now rpm jump from 750-1500 then 1500-3000 or so just erotic I tested all the in and out puts of the voltage, all ready spent including the new ECM 1000$ still have to get the key programmed to see if this is the fix, ? Can I drive the truck with the old ECM dangling or does it need be grounded,I know it does not run well or have much power but need to get it to the dealer for programming I also put on another new TPS for the 122 code , by the way it does not give any code now when running

[heelsrtops]

Did you ever solve your problem? I'm having the same issue with my 2002 qx4?