I replaced my EGR vacuum modulator because it was not functioning, and it took care of part of the hesitation, but even with the new modulator it's still causing a hesitation!!
I took my truck to the shop where I used to work, and they adjusted my TPS. That helped, too. I bumped up the timing to 12' btdc, and that made it run better, but still with a hesitation!
Tonight, I went to Autozone and picked up some vacuum caps. I capped off the EGR valve as well as the metal line the other side of the vacuum line connects to. Now the truck runs great! No hesitation at all. Never thought this engine would be so smooth.
Does anyone have ideas what would be making my EGR cause this problem? The modulator is brand new and the EGR is working (when you hook a vacuum pump up to it and give it vacuum, the truck wants to die).
This is driving me crazy!
I've put new plugs, wires, cap, rotor, fuel filter, cleaned the throttle body & intake manifold, adjusted the idle speed, and I'm sure some other stuff I didn't remember to mention...
Thanks for your guys' help! This site is great.
Ryan
I took my truck to the shop where I used to work, and they adjusted my TPS. That helped, too. I bumped up the timing to 12' btdc, and that made it run better, but still with a hesitation!
Tonight, I went to Autozone and picked up some vacuum caps. I capped off the EGR valve as well as the metal line the other side of the vacuum line connects to. Now the truck runs great! No hesitation at all. Never thought this engine would be so smooth.
Does anyone have ideas what would be making my EGR cause this problem? The modulator is brand new and the EGR is working (when you hook a vacuum pump up to it and give it vacuum, the truck wants to die).
This is driving me crazy!
I've put new plugs, wires, cap, rotor, fuel filter, cleaned the throttle body & intake manifold, adjusted the idle speed, and I'm sure some other stuff I didn't remember to mention...
Thanks for your guys' help! This site is great.
Ryan