dtrombley
New Member
- Joined
- Jan 24, 2017
- Messages
- 19
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1994
- Make / Model
- Ford
- Engine Size
- 4.0
- Transmission
- Manual
So I picked up this truck fall of last year. She's in pretty decent shape, but she's got a few persistent problems I've been trying to sort out.
What I've done so far:
Fuel Pump (Delphi pump)
Fuel Filter (Motorcraft)
Plugs and Wires (Autolite and Motorcraft)
Coolant Flush
Tie Rods, Idler Arm, Pitman Arm, and Upper and Lower Ball Joint on the driver side
Both Front Wheel Bearings
Front Brakes
Fixed a couple small vacuum leaks
PCV Valve (Motorcraft)
Torqued Intake Manifold Bolts
Oil change and filter (of course)
Now the problems she's got:
High Idle on startup - as in ~2200 until warmed up. But only when moving. As in with the clutch in while coasting it'll stick around 2200 and only come down when I let the clutch out in gear (which is destroying my clutch) or when I come to a stop it'll slowly idle down to around 1500. When warm it'll idle at a stop around 1000 and 1500 when moving
I'm pretty sure the intake manifold has already loosened itself up again (in maybe 5k miles). Before tightening the intake, the truck would surge at high RPM's (maybe 4k or higher?), and afterwards the surging went away - but now it's back. I figure I'll just have to do it again and use loctite this time
Immediate loss of fuel pressure - Like as soon as you turn the key off, it drops to 5 psi almost immediately, and then trickles down to 0. 30-32 psi at idle, and 45 or 48psi (can't remember) if you unplug the vacuum hose from the regulator. I had thought it was the check valve in the fuel pump, since the fuel pressure regulator is working right and i can't smell any gas in the vacuum line, but I still lose fuel pressure. Upon further inspection, it looks like i do have a small leak in one of the fuel lines - not sure how to replace/fix it though. (see below picture)
(Ignore the text, I stole the first image I could find off google for approximately the right area) Pretty much right in this area here, just a little further down in the engine compartment. It's a braided steel hose into a hard steel line, and looks like its leaking right at the connection. How do i fix this? Do i just have to replace the whole line?
I've found a vacuum hose unplugged under the throttle body, and I traced it back to the carbon canister. I have absolutely no idea where it goes though, I can't see any connections where it would go.
Also, some asshole ran a yield sign a couple weeks ago and I t-boned him. Not too much damage, but he ****ed up my passenger foglight. Anyone have any clue what foglights these are and where to get another one?
I plan on checking the tps voltage, hopefully the TPS is what's causing the high idle - it should be around 0.9V right? I also need to check the CEL, I have a scanner but I need to clean off the connection on the truck first.
So any clue on the vacuum hose or the foglight? Does the TPS sound like the right place to start for high idle? (Previous owner replaced the IAC valve, looks pretty new)
Thanks for your help in advance!
What I've done so far:
Fuel Pump (Delphi pump)
Fuel Filter (Motorcraft)
Plugs and Wires (Autolite and Motorcraft)
Coolant Flush
Tie Rods, Idler Arm, Pitman Arm, and Upper and Lower Ball Joint on the driver side
Both Front Wheel Bearings
Front Brakes
Fixed a couple small vacuum leaks
PCV Valve (Motorcraft)
Torqued Intake Manifold Bolts
Oil change and filter (of course)
Now the problems she's got:
High Idle on startup - as in ~2200 until warmed up. But only when moving. As in with the clutch in while coasting it'll stick around 2200 and only come down when I let the clutch out in gear (which is destroying my clutch) or when I come to a stop it'll slowly idle down to around 1500. When warm it'll idle at a stop around 1000 and 1500 when moving
I'm pretty sure the intake manifold has already loosened itself up again (in maybe 5k miles). Before tightening the intake, the truck would surge at high RPM's (maybe 4k or higher?), and afterwards the surging went away - but now it's back. I figure I'll just have to do it again and use loctite this time
Immediate loss of fuel pressure - Like as soon as you turn the key off, it drops to 5 psi almost immediately, and then trickles down to 0. 30-32 psi at idle, and 45 or 48psi (can't remember) if you unplug the vacuum hose from the regulator. I had thought it was the check valve in the fuel pump, since the fuel pressure regulator is working right and i can't smell any gas in the vacuum line, but I still lose fuel pressure. Upon further inspection, it looks like i do have a small leak in one of the fuel lines - not sure how to replace/fix it though. (see below picture)
(Ignore the text, I stole the first image I could find off google for approximately the right area) Pretty much right in this area here, just a little further down in the engine compartment. It's a braided steel hose into a hard steel line, and looks like its leaking right at the connection. How do i fix this? Do i just have to replace the whole line?
I've found a vacuum hose unplugged under the throttle body, and I traced it back to the carbon canister. I have absolutely no idea where it goes though, I can't see any connections where it would go.
Also, some asshole ran a yield sign a couple weeks ago and I t-boned him. Not too much damage, but he ****ed up my passenger foglight. Anyone have any clue what foglights these are and where to get another one?
I plan on checking the tps voltage, hopefully the TPS is what's causing the high idle - it should be around 0.9V right? I also need to check the CEL, I have a scanner but I need to clean off the connection on the truck first.
So any clue on the vacuum hose or the foglight? Does the TPS sound like the right place to start for high idle? (Previous owner replaced the IAC valve, looks pretty new)
Thanks for your help in advance!