92 X running rich, no codes.

[Nedwreck]

So... I swapped a '95 4.0 OHV into my '92 X. I used all the '92 sensors and do-dads except for the injectors and water temp sensors. Truck is single O2, and I reused the single O2 pipe and sensor.

The injectors in the old motor were black (19 lb/hr.?) and the 95 motor injectors are red top (30 lb/hr.?).

Truck runs GREAT, and will scratch the tires on takeoff at will.
No burnouts, just really good pep and great low/mid RPM torque (which is my favorite power range, hands down). I haven't taken it past ~3700 RPMs, I haven't the need.
33's on 3.73 gears (FYI).

No codes, no errors. I haven't hooked up my reader, but I do have one.

Here's the rub... it runs rich. Not enough to smoke, or kick a code.. just enough to give a little smell from the tail pipe.

Should I swap the old injectors in? Would using the 95 MAF make any difference?

Stock airbox (with a few holes. heh), stock air filter, and "poor boy" upgraded exhaust.

Would prefer to not foul plugs, soot up the O2 sensor, or induce other problems from a rich condition. That and MPG. (I haven't driven it enough to generate MPG figures)

TIA!

 

[rickcdewitt]

yeah i think 94 or 95 the ohm rating or # per hr changed.i'm having no prob with the 93 ploder injectors in my 92 ranger setup.

 

[Nedwreck]

If I understand right, the color of the top of the injector tells the rating. Almost sounds too simple.


I should add too, that this truck warms up ~fast~. Like within 5 mins. of starting the heater is working! Doesn't seem to overheat though.. so hey.. that's a perk.

Anyway.. out to twiddle with all the vehicles today, it's time to winterize, tune up, and fix oddball stuff!

 

[rickcdewitt]

If I understand right, the color of the top of the injector tells the rating. Almost sounds too simple.

it is,only the ford motorsport injectors are color coded.the factory ones aren't.ford has a few colors for the same rating in different apps

 

[Turdle]

Check the vacuum line going to the fuel pressure regulator for a fuel smell. Sometimes the regulator will develop a leaky diaphragm

 

[Nedwreck]

good info guys thanks....

will check that regulator later today.

 

[SPORTEXP]

According to my TSB's the red injector that come out in 1993 are deposit resistant injectors (DRI). The bulletin I'm referring to is 93-7-5