Engine/Transmission (1998.5 - 2002) Engine surge or shutter

[odieub]

Got a 01 ho 6 speed drives and runs fine when pulling a trailer in six gear about 1700 1800 it gets a bad shutter of stumbele. You can feel it bad. Any ideas.

 

[GCULP]

shift down and rev it, with the Smarty Revo and 275's you're probably dumping too much fuel for it or the timing is to aggressive and it's not happy. I have the same truck with an EZ and Mach 1. 6's, if I hammer on it on level 3 it will shutter too.

 

[dknoch]

Same thing here. I just installed mach 2s and it started immediatly. Used to get it a little in the winter but it got real bad with the new injectors. Try a non-timing software on the Smarty and see if that works better for you, it did for me.

 

[AClayton]

My truck does this also... . figured it had something to do with cooler outside temperatures. I turn off the timing module I have and it helps considerably. I have gotten used to the extra power that module provides in the hills,but I hate the surging worse,so I turn it off.



Anything we can do to keep the timing boxes on,but kill the surging???



Alan

 

[odieub]

yeah if all works well in about two or three months im going to fix mine got a 97 215 12v sitting in the corner just about got all the stuff to freshin up. it will then be sitting between the fenders and no more vp.

 

[dknoch]

If you do a search, there is some stuff on fooling the IAT sensor into thinking it is warmer outside so that the ECM retards the timing some. Just a 1K ohm resistor in the harness that the IAT plugs into will do this, it makes the ECM think it is summer time and problems are gone. However, you lose the grid heaters and high idle and all the other cold weather warmup stuff. Someone I think used an adjustable resistor and bypassed the IAT sensor all together.