Cars problems daihatsu hijet

Bad wire harness or bad pump

I FIGURE THAT IT IS OPERATED BY THE EDC OF THE CAR.

1987 rangers use a device called a TFI module to control ign. timing , this merely triggers a std. coil to fire the center port of distributor cap , this device only controls the coil to fire but does send a pulse for timing back to ecu this sets the base pulse for fuel injection , but its also affected by manifold Air flow and exhaust O2 amounts (closed loop) , but engine should run in base mode (open loop) fuel timing (but not well) , fuel pump relay is enabled to run via ECU output , Now your year ranger had a tech bulletin out on fuel pumps , seems they had a problem getting them to work after a fuel filter was replaced , something about a false backpressure , no if you have no/low fuel pressure then id look at fuel pump power 1st then fuel pump itself assuming you've already tried a new filter of course

Patrick: According to ECU Doctors.com: "

Here are the most common symptoms of a bad ECU:

1. Check Engine Light stays on after resetting
2. Car was jump started on reverse polarity
3. Engine turning off for no reason
4. Water Damage or Fire Damage on the ECU
5. Apparent loss of spark
6. Apparent loss of injection pulse or fuel pump
7. If your alternator overcharged the battery
8. Intermittent starting problems
9. Overheating ECU
10. ECU has Broken Pins
11. Loss of communication between the ECU and the Scanner
12. A control module memory checksum error"
13. ----------------

There is a really good article all about crankshaft positioning sensors: http://www.doityourself.com/stry/warning-signs-of-a-bad-crankshaft-position-sensor
I hope that helps you out!

The PCM (ECU does that) its part of what is called EFI, electronic fuel injection, it's a computer, that gets inputs, and uses those inputs to injector perfectly at ALL times.
what engine? 3cy. or 4? is it TBI injected or MPI injected
1 injector or 4? we need to know that first.
does it run on test fuel for 3 seconds.
when was last time it run perfect, last week last year. what?
first off stop guessing, you can go broke that way.
want to diagnosis it? the steps are easy. if fuel is good..

1. fuses good.?
2. CEL lamp glow keyon, if not ECU is bad. or bulb , it must glow.
3. compression over 150PSI on all cyl. (w.o.t = wide open throttle)
4. do a 60k, mile tune up yet, filters, spark,. and cam timing belt.?
5. if not, why wait?
6. 6: is spark good tall cylinders not just 1? is the timing way off if yes, the cam belt did slip, do not fiddle tiiming, fix the belt. first.
7. ok it now magically runs on test fuel for 3 seconds and sounds great. so we do fueling last.
8. fuel pressure tests are next. takes $20 gauge got one?
9. ill stop here, as fueling tests are long play.l..... ask. if you can get to step 9,

I think all 94 metors are TBI engines, one injector
up to 1997 inclusive.
then the 1998 offered 4cyl, MPI injected engine.


have you learned how to use flash codes (DTC) yet?
insert jumper , key on, see CEL lamp glow and flash 12s'
the crank for 5seconds, see if the flashes go to 41 or 42?
bingo if yes.
the TBI allows the mech to watch injection, at the TB.
with top hose off. you can watch it inject as person 2 cranks.
does it?
the ECU brain cuts fuel at the first sign of:

1. lost spark (to stop fires)
2. lost Cmp sensor, same .
3. TPS ground wire busted and ecu things foot is W.O.T (super secret unflood mode) (or TPS cracked in half inside)

or total loss of fuel pressure.

Don't dismiss the coil pack completely. The hi voltage side of the pack is what usually fails.

This could go several ways #1 engine mechanical check cranking compression should have 125 psi or greater in all cylinders if low but even squirt oil (1/2 oz.) in 1 cylinder and retest goes higher then rings sealing has been lost. if uneven check timing belt for jumped or misalignment. #2 electrical does it have electrical spark to plugs crank engine with a spark plug connected to spark plug wire laying plug on engine can you see spark? No test ignition coil wires with a logic probe both terminals will be red with key on one will flash red/green when engine cranking does not the primary ignition needs repair Ignition module? or pick-up coil/ crank sensor. #3 fuel system pressure and injection pulse. injection pulse can be tested with logic probe DONOT USE A TEST LIGHT YOU CAN RUIN THE ECU .

have you checked that your injecters work while fitted to fuel rail over a rag then crank engine and see if fuel comes out of the injecters? fuel pump may be weak or not delivering fuel !

no start , crank perfectly
so , got spark?
the ECU has programming (ROM) and in fact kills all fueling with no spark , (even if it thinks there is no spark, even if spark is ok)
all ECU use a way to read back spark quality, (ALL){LAWS}
how honda does it in code, i don't know , see C R O M E forum)
turn the key over means nothing to me.?? sorry, it doent/
try saying what postion? cranking? or just keyon.
now some more EFI rules.
The EFI (some) do not activate the pump relay until cranking.
some do just key on for 3 seconds, read the FSM, its free.
need a link to the free manual? read the ECU logic on that.?
and prime has a special meaning, it means purge air,
its not for fuel. some system send a fast prime pulse. to clear air from the pressure lines, this plus does not inject.
that is how EFI works,

the flow
1: key on, ECU sends prime pulse, (air purge)
2: some ecu, run pump for 3 seconds, and pressure hits 35psi? RTM.
3: all ecu activate pump cranking and running.
4: now check pressure. !" 36 psi FSM stated spec"
5: now crank, if the ECU sees no spark errors, it injects
6: if the ECU sees WOT. it stops injection to clear a flood, cranking.
those rules cover most ECU made.

honda this year has a special feature called,
Fuel Cut-Off Control'
if this messes up, it i can cut fuel
does this help?
even better is this site, (has all the facts..)
http://honda-tech.com/showthread.php?t=810101

I believe you are on the right track. E.C.U. or relay.