Dies, almost stalls when cold

[Vanner1993]

When starting my truck, it will start and idle for warm up. But if i go to put it in gear (clutch) as I let out the truck will sputter and not want to run. It will sputter if given more then half throttle when cold. This will continue until it warms up, then its fine. Efi shouldn't run like this. It sputters under load when cold, and when cold in neutral it will sputter and backfire once in a while when give full throttle.

 

[jhammel85]

Did you check for codes yet? I'm not really sure...I wish I had a better answer.

 

[freedom5]

I had the same problem with my 1987 2.9 that took me over a month to resolve. I changed every sensor, IAC, O-2 sensor, egr valve and solinoid plus the ignition coil and engine coolant sensor. I had good fuel pressure, no leak at the pressure regulator. It ran pretty good after warming up to operating temp but still didn't have good acceleration.

I finally discovered a split in the EGR tube (after it finally blew through the insulation sleeve). The egr tube is no longer available except through pick and pull so I wrapped the split with an exhaust patch then coated it with JB Weld. I believe the egr was drawing outside air into the intake manifold through the split causing the problem. I now have good starts, smooth idling and rapid acceleration.

freedom5