Idilarry89
Registered User
Ok so I've had my current idi for exactly a year and I'm having my first issue after 50k miles. This is odd for me and I might figure it out tonight.
So I noticed a couple weeks ago and intermittent Miss at idle had no issues at high speed. At least until last night. Went to Rapid which is a city about an hour away drove around all day running errands no issues. Then coming back I started feeling a surge at highway speeds about 10 minutes from my shop. So I pulled up to the gate got out could tell it had a miss and went to go open the gate and it stalled. I couldn't get it started so I pushed it in and took the service truck home.
Before I left this afternoon I took the fuel filter off and noticed it was dry. No biggie fuel pumps bad or I've got an air leak from the tank to the pump, or from the pump to the filter. So I cranked it over with the filter off and I had good fuel flow (by the way replace the fuel filter about a week ago) So I thought fuel filter was bad replaced it bled the system. Got the truck started it ran for about 45 seconds then stalled out again. So I pulled the fuel filter off and it was empty again.
I know I have one return cap leaking on the back passenger side. But I've never seen one put air into the system that fast let alone while it's running at a high idle. I'm going to do a pressure and flow test on the fuel pump tonight to make sure it's putting out enough pressure to keep the filter full, but considering it's not that old and how much fuel put out the first time I cranked it, I doubt that's the issue.
I'm curious, I don't know how many miles are on the injectors because they were out of the donor truck that I got the engine from, but considering the miss, do you think one of the injectors could be letting compression into the injection pump and into the rest of the fuel system?
Like I said I'm going to test the fuel pump first and then move on to possibly the injectors. but I need my truck .
By the way this is also the 1991 that you will see in my signature
So I noticed a couple weeks ago and intermittent Miss at idle had no issues at high speed. At least until last night. Went to Rapid which is a city about an hour away drove around all day running errands no issues. Then coming back I started feeling a surge at highway speeds about 10 minutes from my shop. So I pulled up to the gate got out could tell it had a miss and went to go open the gate and it stalled. I couldn't get it started so I pushed it in and took the service truck home.
Before I left this afternoon I took the fuel filter off and noticed it was dry. No biggie fuel pumps bad or I've got an air leak from the tank to the pump, or from the pump to the filter. So I cranked it over with the filter off and I had good fuel flow (by the way replace the fuel filter about a week ago) So I thought fuel filter was bad replaced it bled the system. Got the truck started it ran for about 45 seconds then stalled out again. So I pulled the fuel filter off and it was empty again.
I know I have one return cap leaking on the back passenger side. But I've never seen one put air into the system that fast let alone while it's running at a high idle. I'm going to do a pressure and flow test on the fuel pump tonight to make sure it's putting out enough pressure to keep the filter full, but considering it's not that old and how much fuel put out the first time I cranked it, I doubt that's the issue.
I'm curious, I don't know how many miles are on the injectors because they were out of the donor truck that I got the engine from, but considering the miss, do you think one of the injectors could be letting compression into the injection pump and into the rest of the fuel system?
Like I said I'm going to test the fuel pump first and then move on to possibly the injectors. but I need my truck .
By the way this is also the 1991 that you will see in my signature