RangerFabWorks
The O.G blackwidow67
TRS Forum Moderator
Supporting Member
V8 Engine Swap
TRS 20th Anniversary
- Joined
- Jan 31, 2009
- Messages
- 5,202
- Reaction score
- 715
- Points
- 113
- Age
- 32
- Location
- Lexington, North Carolina
- Vehicle Year
- 1990
- Make / Model
- Ford
- Engine Size
- 302
- Transmission
- Manual
I’ll try to keep this short and sweet. On the 94 ranger 4.0 I got. I’m having an issue. It will run perfect cold. Idle. Rev out. After about 10 mins of running. It will lose power more and more. And start popping through the throttle body. Unless you put it to the wood. Then it wakes up. Also has a farting sound at idle through the exhaust.
I kinda threw the parts cannon at it. But also diagnosing it along the way. New parts include.
Ecu
Tps
Maf
Coil
Wires
Plugs
FPR
ICM
Intake gaskets
Injectors
Fuel pump and filter
Replaced all the vacuum lines
Temp sensor
Intake air temp sensor
O2 sensors
Intake tube and filter
fuel pressure idling is 32. Fpr unplugged is 40. Holds pressure for 45 mins off.
Was getting code 121 for tps out of range. Swapped the tps for a motorcraft one. Got rid of that code. But I’m getting codes 172/177.
today while driving home. When it was running the worst and not revving at all. I unplugged the maf. Truck instantly idled better. And drove much better. Down on power. But atleast drove.
I’m thinking faulty MAF. (it’s a cheap cardone replacement. I have a hitachi one on order)
Thoughts please?
I kinda threw the parts cannon at it. But also diagnosing it along the way. New parts include.
Ecu
Tps
Maf
Coil
Wires
Plugs
FPR
ICM
Intake gaskets
Injectors
Fuel pump and filter
Replaced all the vacuum lines
Temp sensor
Intake air temp sensor
O2 sensors
Intake tube and filter
fuel pressure idling is 32. Fpr unplugged is 40. Holds pressure for 45 mins off.
Was getting code 121 for tps out of range. Swapped the tps for a motorcraft one. Got rid of that code. But I’m getting codes 172/177.
today while driving home. When it was running the worst and not revving at all. I unplugged the maf. Truck instantly idled better. And drove much better. Down on power. But atleast drove.
I’m thinking faulty MAF. (it’s a cheap cardone replacement. I have a hitachi one on order)
Thoughts please?