Thats what I was thinking but I didn't want to bias any opinions. The O2 (technically an A/F sensor) is newer and OEM, so is the MAP sensor. I have no CEL and no codes. I'm gonna have to get a wideband on it and see WTF is going on.
My Ford Truck Project (And Other Projects)
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Thats what I was thinking but I didn't want to bias any opinions. The O2 (technically an A/F sensor) is newer and OEM, so is the MAP sensor. I have no CEL and no codes. I'm gonna have to get a wideband on it and see WTF is going on.
Fuel filter is only a year or so old, plugs look too consistent for me to think injectors. I'll break out the multimeter and check the resistance on them to be safe. I gotta break out the FSM.
Check fuel pressure. Maybe a weak pump? Or pump ground?
Well I spent some time messing around with it today and fuel pressure was one of the things I checked. I started by pulling all 8 spark plugs and seeing how they looked. All relatively similar.
Since the plugs were out, I figured I may as well do a compression check, to satisfy my own curiosity more than anything. I got 152, 152, 151, 160, 150, 149, 149, 156. Nothing alarming there, not that I was really expecting anything.
So I put the plugs back in and checked fuel pressure and it is right where it should be. KOEO was a hair over 40 PSI on both tanks (each has its own fuel pump). KOER about 34 PSI. KOER with fuel pressure regulator disconnected and it jumps to 40ish PSI. So the problem is not in the tanks, lines, pumps, or filter.
I tested the resistance on the 4 injectors I have access to, you need to remove the upper plenum to get at the other 4. All 4 tested between 14.2-14.4 ohms which is good. It doesn't tell me that they aren't clogged, but electrically they are fine. Before I pull the plenum and start tearing shlt apart to test the other 4, I'm gonna give the I-talian tune up a shot. I'm not Italian so I'm not technically qualified to do this, but I think I'm familiar with the procedure 🤣 I've got a big bottle of Lucas to dump in the tank, I'll fill it up with 93 and see what happens. Hopefully with the timing dialed back and some higher octane fuel the knocking will stop. Maybe the Lucas will do something too.
Since the plugs were out, I figured I may as well do a compression check, to satisfy my own curiosity more than anything. I got 152, 152, 151, 160, 150, 149, 149, 156. Nothing alarming there, not that I was really expecting anything.
So I put the plugs back in and checked fuel pressure and it is right where it should be. KOEO was a hair over 40 PSI on both tanks (each has its own fuel pump). KOER about 34 PSI. KOER with fuel pressure regulator disconnected and it jumps to 40ish PSI. So the problem is not in the tanks, lines, pumps, or filter.
I tested the resistance on the 4 injectors I have access to, you need to remove the upper plenum to get at the other 4. All 4 tested between 14.2-14.4 ohms which is good. It doesn't tell me that they aren't clogged, but electrically they are fine. Before I pull the plenum and start tearing shlt apart to test the other 4, I'm gonna give the I-talian tune up a shot. I'm not Italian so I'm not technically qualified to do this, but I think I'm familiar with the procedure 🤣 I've got a big bottle of Lucas to dump in the tank, I'll fill it up with 93 and see what happens. Hopefully with the timing dialed back and some higher octane fuel the knocking will stop. Maybe the Lucas will do something too.
I put 3/4 of the bottle in the front tank and the rest in the rear tank and I filled up with 93 this morning. I took the truck on the highway to the junkyard where I met up with UC645 and pagrunt and I drove it hard both ways. I didn't go past 4th gear and since the speedometer is not incredibly accurate at high speed, I checked my GPS speed on my phone, and I was moving at a pretty good lick-
Undoubtedly the fastest I've ever gone in this truck and I don't think I want to try to go any faster, lmao. Right around 4000 RPM she was really screaming and I wasn't gonna push it much harder than that. But on the whole trip, even under load and hard acceleration, there was no noticeable pinging. Whether it's the higher octane gas, the dialed down timing, the Lucas or a combination of all three, I don't know. Whether it'll stay this way, I also don't know. But I'll continue to drive it around and see what happens, play it by ear. And some Seafoam through the intake is probably not a bad idea.
Undoubtedly the fastest I've ever gone in this truck and I don't think I want to try to go any faster, lmao. Right around 4000 RPM she was really screaming and I wasn't gonna push it much harder than that. But on the whole trip, even under load and hard acceleration, there was no noticeable pinging. Whether it's the higher octane gas, the dialed down timing, the Lucas or a combination of all three, I don't know. Whether it'll stay this way, I also don't know. But I'll continue to drive it around and see what happens, play it by ear. And some Seafoam through the intake is probably not a bad idea.
Maybe a step colder plug or tighten up the gap?
Saw these on FB marketplace earlier this week and met with the seller today. I’ve wanted a set since I've had the truck, but there is nothing really wrong with the wheels I have and people usually want too much.
I paid $80 for them. Tires are junk. Guy said they had been in his shed for a few years. They came with all 4 center caps and all the screws. They have typical corrosion on them but nothing major. I'll strip the clear and polish them.
I hit them with some simple green real quick-
When I pulled the truck in the garage last week I forgot the CB antennas were on the back. Broke both. So I took a ride to the nearest Pilot and bought two new ones. I went with 4 footers instead of the 3' ones I had. They are a tad long but reception is a lot better.
I paid $80 for them. Tires are junk. Guy said they had been in his shed for a few years. They came with all 4 center caps and all the screws. They have typical corrosion on them but nothing major. I'll strip the clear and polish them.
I hit them with some simple green real quick-
When I pulled the truck in the garage last week I forgot the CB antennas were on the back. Broke both. So I took a ride to the nearest Pilot and bought two new ones. I went with 4 footers instead of the 3' ones I had. They are a tad long but reception is a lot better.
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