1994 bronco 4x4 302cid efi wont start under cold conditions
Will start under warm conditions lost power to fuel pump,replaced pump ran new power wire,replaced fuel filter,cap,rotor,wires ,plugs,and coolant temp. sensor.push gas pedal while cranking when cold stumbles then starts.
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cant get power when and where.? power is voltage.
do you have 12vdc at the pump cranking?
does car not start
why not post the symptoms so we can be on the same page.
i can walk you thru all fueling issues of any car.
why not post whats up;?
btw fueling is cut on all EFI if the EFI detects lost spark
so we check that 1st !
Fueling , EFI , is complex, (kinda) but is simple
the EFI dont fuel the engine, if there is no spark
or if it thinks you crashed, its a built in protection.
some cars inject and then stall in 2 seconds, due to , no spark.
the ECU monitors spark if it sees it drop dead, fuel ends.
even if spark is good. see why (answer, its a monitor)
the monitor works different on all EFI made.
Timing belt being off one tooth will not cause this problem but rather loss of power and hard starting all the time,
in the cold it will not start, the engine will spin but wont fire is this correct?
There are many things that can cause this, a little testing will be needed, the first thing that comes to mind with the ford and cold weather is the coolant temp sensor, it give computer a false reading and can cause hard starting or even no start, a scan tool would be helpful to see what temp it is give computer. The best way to narrow this down to to check for spark when it wont start, a weak coil in cold weather will cause this problem or bad coil wire to cap, but if you can see if it has spark and let me know, another test is to check fuel pressure, to see if it is getting fuel, and the fuelpump relay,
Let me know if it has spark or fuel when is does not start, good day
You have a faulty TPS (throttle position sensor). It controls the idling speed for all conditions i.e.cold, warm, AC on It's not uncommon for a TPS to work perfectly under one condition and fail under another for instance, it will idle fine when cold but once it warms up you need a foot on the gas to keep it running. Best of luck with your problem.