fixt
Well-Known Member
- Joined
- November 15, 2010
- Messages
- 144
- Reaction score
- 2
- City, State
- North Carolina
- Year, Model & Trim Level
- 1996 5.0L XLT AWD
Helping out the neightbor here, replaced plugs and wires on his truck.
1994 Ranger XLT auto transmission
2.3 MFI distributorless ignition, dual plug system
VIN 8th digit A, no EGR valve
Plugs were boogered with gaps beyond .065 with deposits, one wire was separated at the plug connector. It missed some but ran ok. Most noticeable at startup. Truck runs really good now, starts instantly, idles well.
No problems there.
CEL light came on, so I jumpered Signal Test Input to sig return in the prescribed manner and used a homebuilt LED blinky thing I made to count pulses. CEL too dim.
KOEO Code 33 - EGR did not open respond during test, or if memory code, did not open intermittently EVP EVR PFE
EVP- EGR Valve Position
EVR- Engine Vacuum Regulator
PFE- (delta) Pressure Feedback EGR
CM Code 543 - Fuel pump monitor circuit shows no power
Not worried about this one yet or maybe not at all.
I have not tried KOER test at this point.
The code 33 came in on test drive decelerating into a curve, just let off the gas to slow down.
Can't find an EGR, or EGR sensors in any obvious locations.(edit-because there's not any)
Here's the cool part. VIN 8th digit A shows no EGR valve.
(edit- VECI label shows no EGR)
Why a code for a non existent part?
Is it a code specific to this truck and engine meaning something else?
Can someone point me at some information on how this emissions system works; I can't find anything on it.
1994 Ranger XLT auto transmission
2.3 MFI distributorless ignition, dual plug system
VIN 8th digit A, no EGR valve
Plugs were boogered with gaps beyond .065 with deposits, one wire was separated at the plug connector. It missed some but ran ok. Most noticeable at startup. Truck runs really good now, starts instantly, idles well.
No problems there.
CEL light came on, so I jumpered Signal Test Input to sig return in the prescribed manner and used a homebuilt LED blinky thing I made to count pulses. CEL too dim.
KOEO Code 33 - EGR did not open respond during test, or if memory code, did not open intermittently EVP EVR PFE
EVP- EGR Valve Position
EVR- Engine Vacuum Regulator
PFE- (delta) Pressure Feedback EGR
CM Code 543 - Fuel pump monitor circuit shows no power
Not worried about this one yet or maybe not at all.
I have not tried KOER test at this point.
The code 33 came in on test drive decelerating into a curve, just let off the gas to slow down.
Can't find an EGR, or EGR sensors in any obvious locations.(edit-because there's not any)
Here's the cool part. VIN 8th digit A shows no EGR valve.
(edit- VECI label shows no EGR)
Why a code for a non existent part?
Is it a code specific to this truck and engine meaning something else?
Can someone point me at some information on how this emissions system works; I can't find anything on it.