hesitation on acceleration,cold weather

[fordtruckdude]

Good afternoon,glad to be associated with so many good hearted knowlegeable people.The problem I'd like help on is,every time cold weather comes,the problem starts.It is a 1999 Ford F350 4x4 Pick-up 7.3 Turbo Diesel,Super Duty truck.When ambient temp. is below 30 degrees F.,there is acceleration hesitation between 1400 and 1800 RPM.As ambient temp.rises above 30 degrees F. the problem goes away.Please let me know where your suspicions take you ?What component(s) could be bad.There is no dash lights illuminated.
Thank You.
Sincerely,Jack

 

[Blue Goose]

Welcome to FTF, Jack! Does your truck do this hesitation regardless of the operating temp as long as the ambient is below 30*?

 

[BIGRED911]

exhaust back pressure valve would be my guess...i had and early 99 and just unhooked it...still warmed up just as quick and didnt have any hesiatations...any where...

 

[fordtruckdude]

I'm sorry for the late response,computer problems.Back to the vehicle's problem,if I remember correctly,it still acted up at operating temp.but not as often.
Thanks for the reply.

 

[blacksnapon]

Good afternoon,glad to be associated with so many good hearted knowlegeable people.The problem I'd like help on is,every time cold weather comes,the problem starts.It is a 1999 Ford F350 4x4 Pick-up 7.3 Turbo Diesel,Super Duty truck.When ambient temp. is below 30 degrees F.,there is acceleration hesitation between 1400 and 1800 RPM.As ambient temp.rises above 30 degrees F. the problem goes away.Please let me know where your suspicions take you ?What component(s) could be bad.There is no dash lights illuminated.
Thank You.
Sincerely,Jack

Many of these driveability issues can be traced to thermostats. Both EOT and ECT have a hand in pcm calculations related to performance.

 

[fordtruckdude]

Thanks for the additional sources that I need to check.I'm looking into the EBPB and I will also check temp.sensors with my scan tool.