greasemonky
Full Access Member
Hi guys, new to the forum here, just signed up but been reading for a couple of weeks. I have just bought a 88 7.3 a few weeks ago (see sig). I am having cold starting problems. It will start after cranking for a minute or so and then runs fine (except a slightly rough idle) and starts fine after warm.
Here is a list of things I have check and or replaced:Glow plugs are new(motorcraft) with a new relay and I run a #4 cable to the relay with a manual switch, New return line kit,caps,orings,etc. Also I have changed injectors with a set that I know are good(pulled from my Dads 80k mile truck).
The check valve in the filter head is bad and I know this will cause cold starting issues so I put a small cut-off valve there and shut it off at night for testing purposes(I have a new one on order) still hard to start in morning. I have checked every fuel line on the truck for wetness.
When I first got the truck it had leaky caps so I replaced with the new kit, I still was having leaking issues around the caps. I had to clear out the return line down to the tank selector valve after that all dry. Must had some crud in there.
Also it has a slight rough idle almost like an intermittent miss in a gas engine. Its not bad but I know its there so it bothers me. I figure it's all related to the cold start issue. Probably air but where it's coming from is the mystery. There are 2 other IDI's here on the farm so I know what should run like.
With the mileage that the motor has i thinking maybe the IP is the curpit. I didn't get any information from the previous owner if the IP has been replaced. It does seem dry though and the motor has plenty of power I will add.
Any suggestions? Thanks in advance.
Here is a list of things I have check and or replaced:Glow plugs are new(motorcraft) with a new relay and I run a #4 cable to the relay with a manual switch, New return line kit,caps,orings,etc. Also I have changed injectors with a set that I know are good(pulled from my Dads 80k mile truck).
The check valve in the filter head is bad and I know this will cause cold starting issues so I put a small cut-off valve there and shut it off at night for testing purposes(I have a new one on order) still hard to start in morning. I have checked every fuel line on the truck for wetness.
When I first got the truck it had leaky caps so I replaced with the new kit, I still was having leaking issues around the caps. I had to clear out the return line down to the tank selector valve after that all dry. Must had some crud in there.
Also it has a slight rough idle almost like an intermittent miss in a gas engine. Its not bad but I know its there so it bothers me. I figure it's all related to the cold start issue. Probably air but where it's coming from is the mystery. There are 2 other IDI's here on the farm so I know what should run like.
With the mileage that the motor has i thinking maybe the IP is the curpit. I didn't get any information from the previous owner if the IP has been replaced. It does seem dry though and the motor has plenty of power I will add.
Any suggestions? Thanks in advance.