P1093 code
- Thread starter Duroman
- Start date
P1093 is low fuel pressure during enrichment or when under power
id start with the cheap and easy stuff. Filter, rubber fuel lines, filter housing rebuild. after the filter you can put some clear vinyl lines after the filter housing to watch for air in the lines
then if you still have issues then you'll need to measure the return fuel from each injector bank and the CP3 and see if any are returning too much fuel. if all are within spec then maybe a weak cp3 pump. you may get by with a lift pump if it's not too bad. a scan tool that can read desired and actual fuel pressure can help diagnose this
it would also be helpful to list any modifications if any, miles on the truck and if the injectors are original or how many miles ago they were changed
id start with the cheap and easy stuff. Filter, rubber fuel lines, filter housing rebuild. after the filter you can put some clear vinyl lines after the filter housing to watch for air in the lines
then if you still have issues then you'll need to measure the return fuel from each injector bank and the CP3 and see if any are returning too much fuel. if all are within spec then maybe a weak cp3 pump. you may get by with a lift pump if it's not too bad. a scan tool that can read desired and actual fuel pressure can help diagnose this
it would also be helpful to list any modifications if any, miles on the truck and if the injectors are original or how many miles ago they were changed
Filter. Even if you just changed it, start there.
Filter head will usually give you starting issues unless you have a lift pump, then it could start leaking.
Rubber fuel line on the driver side between he cab and the engine is a known weak point that will collapse under load.
Filter head will usually give you starting issues unless you have a lift pump, then it could start leaking.
Rubber fuel line on the driver side between he cab and the engine is a known weak point that will collapse under load.
Is this the same truck that was hard to start last year? That had the FPR/bouncing idle problem at the same time? If so, what did you do to address those issues? You never bothered coming back to tell if you got the truck repaired or not.
Remember, we arent standing next to you looking at the truck, so giving out more info is far better than not. Help us help you, even though this ISN'T "Fixya".
Remember, we arent standing next to you looking at the truck, so giving out more info is far better than not. Help us help you, even though this ISN'T "Fixya".
