I have another thread going on over at .net, but figured I'd try here too...
I've been having this hesitation issue for a while. But it's a hesitation from what I think is flooding. When the truck is parked and idling, if i barely tap the gas the AFR goes to 10.0, the rpms dip, and then the engine revs up. It does this whether it's hot or cold, in park, reverse, or drive. From a stop light, I'll hit the gas, and it's the same thing, rpms dip, then it picks up and goes. It does this when I slow down and accelerate out of a turn. If I get on the gas it'll get up to about 5-7psi before the rpms start bouncing around and the truck bogs out. Idle smells rich, and MPG is not good either. I also get random pops/misses at idle. Fuel psi is good and solid, and climbs # for # with boost.
I have 50# injectors, a turbo tweak chip, AFPR, PLX WB02.
I did the bike inner tube trick on the upper IC, and there's no vacuum leaks other than a slight hiss coming from the bottom of the throttle body...
So far I've replaced the cap/rotor, plugs, coil, ICM, and MAP sensor. I don't have anything to test the plug wires, but I took a spare good plug wire and swapped it out on every cylinder with no change. I don't think it's a bad or clogged injector, because it's going rich instead of lean.
I also get this buzzy/ticking/grinding sound every time I tap the gas...I can hear it in the cab and under the hood... I made a video of it with a link below... In the cab it kinda sounds like pushing a plastic bucket upside down on concrete... under the hood it sounds like taking a comb and dragging it down the edge of a table real quick... and it sounds like it's coming from the distributor.
https://youtu.be/FBt9aRIH_6A
Just curious if anyone here has any ideas... or heard these noises before.
Thanks in advance and have a good weekend!
I've been having this hesitation issue for a while. But it's a hesitation from what I think is flooding. When the truck is parked and idling, if i barely tap the gas the AFR goes to 10.0, the rpms dip, and then the engine revs up. It does this whether it's hot or cold, in park, reverse, or drive. From a stop light, I'll hit the gas, and it's the same thing, rpms dip, then it picks up and goes. It does this when I slow down and accelerate out of a turn. If I get on the gas it'll get up to about 5-7psi before the rpms start bouncing around and the truck bogs out. Idle smells rich, and MPG is not good either. I also get random pops/misses at idle. Fuel psi is good and solid, and climbs # for # with boost.
I have 50# injectors, a turbo tweak chip, AFPR, PLX WB02.
I did the bike inner tube trick on the upper IC, and there's no vacuum leaks other than a slight hiss coming from the bottom of the throttle body...
So far I've replaced the cap/rotor, plugs, coil, ICM, and MAP sensor. I don't have anything to test the plug wires, but I took a spare good plug wire and swapped it out on every cylinder with no change. I don't think it's a bad or clogged injector, because it's going rich instead of lean.
I also get this buzzy/ticking/grinding sound every time I tap the gas...I can hear it in the cab and under the hood... I made a video of it with a link below... In the cab it kinda sounds like pushing a plastic bucket upside down on concrete... under the hood it sounds like taking a comb and dragging it down the edge of a table real quick... and it sounds like it's coming from the distributor.
https://youtu.be/FBt9aRIH_6A
Just curious if anyone here has any ideas... or heard these noises before.
Thanks in advance and have a good weekend!
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