scratching my head on this

[devildog72]

Ok truck has a low end miss and hiccups at low speeds. Checked fuel pressure and it's at 13 to 15. Replaced plugs ,wires, cap, rotor, fuel injectors, fuel regulater, idle air control and timed to zero degrees. Only thing I haven't replaced yet is tps. Any other things I need to check? Thanks Dustin

 

[Cameron]

Egr could be causing a vacuum leak could do something like this sounds like you've replaced about everything and on the distributor pull off the rotor and look at the magnet below for small cracks I had this happen once intake gasket could have a leak causing a vacuum leak also there's not any codes?

 

[devildog72]

No codes at all. I unplugged the map sensor while running and it threw code so thata working well. I will look at the egr tonight after work .thanks

Egr could be causing a vacuum leak could do something like this sounds like you've replaced about everything and on the distributor pull off the rotor and look at the magnet below for small cracks I had this happen once intake gasket could have a leak causing a vacuum leak also there's not any codes?

 

[drakon543]

Just as a side note just cause something is seemingly working properly during idle doesn't mean it working throughout a drive. It is possible for things to only show themselves during specific rpm ranges or during a load.

 

[SunlitComet]

you did the timing set with the wire wire on the pcm correct? btw what year?

 

[Auto Parts Guy]

how about the coil?

 

[devildog72]

Replaced the tps and read somewhere on here to disconnect the battery which I haven't yet to reset it. It runs tons better but still little hesitation at take off so I'm going to play with timing a little more. If the coil going bad I will just buy a new distributor with built in coil.lol