I have a similar thread in the Ranger section, but it seems very few want to read more than one paragraph so I will try to keep this as simple as possible.
Engine had a mini-overhaul detailed in
this thread.
Details:
1988 Ranger XLT, Super-Cab
2.3L, 5sp, 4x2
Approx ~124k
Symptoms/Findings:- MPG dropped from 23+ city to 18-20.
- There is virtually no pick-up (no pun intended) after it is warm. It is "ok" at best when cold.
- If I park, go in a store, come back out and start up, it will start fine, then 10-30 sec later it will start to stumble/sputter.
- TPS is believed to be bad from old codes that were pulled.
- Idle is VERY rhythmic once it is fully warmed up. Kind of like what a sound wave looks like. When it dips down in RPM it almost dies.
- Idle is normal at "morning"/cold start-up, and as I said the power is better, but still not normal.
- Timing at idle (didn't touch "spout" connector or anything else) was 10 deg BTDC, and didn't get more than 20 deg BTDC when I rev'ed the engine.
- "Total timing" never got above 20 deg BTDC. (Don't know if this is a problem since I can't find a listing for "total timing".
- Had to use the throttle stop screw to bring the idle down from 1000-1200 to around 800-1000. This is when I noticed the poor idle.
- Filling the tank seemed to improve the idle quality.
- Compression tests were 190-195 across all 4 cyl.
- No new codes were pulled yet (lack of time to do it).
- Fuel pressure read ~30-35 psi while running +leaking, and I couldn't get a reading with the engine off due to the little o-ring that fell apart (reason for the leak). New o-rings coming from the gauge manufacturer.
- No fuel found in the FPR vac line.
- Spark plugs looked like this.
Codes pulled a few months ago -
1) 23 - TPS
2) 31 - EVP
3) 67 - NPS - Not important since it isn't on my trans anmore.
---------
4) 11 - System ok
Other useful (or useless) info:
I can stand on the pedal while it is in gear on a flat with no knocking or pinging, and barely accelerate. Getting it up to speed is also a chore, not to mention any inclines or hills and I loose speed. It is almost like when I was a kid I had a 1 cyl moped that would do the same thing. Of course it is normal for the moped with only 1 cyl to do that.
Also - Can someone tell me, show me, pics would be great, the exact location of this spout connector on an 88' 2.3L EFI? Apparently what I thought was it was not. I think I found it but not sure.
Sensors/parts replaced during the "overhaul" with OEM Ford parts:
Air temp
Coolant temp
Oil pressure
PCV
O2
EVPS (sp? acronym) - EGR position sensor
Cap, rotor, plugs, wires, coil
Air filter
Water pump
Thermostat
Tensioner
Oil pump
Non Ford parts:
TPS - Ford part on order, but I don't have it yet.
EGR
Fuel filter - I have an OEM one but this one should still be good.
Timing belt - I have the OEM one now, but didn't at the time.