Question about 1994 Ford Bronco

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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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I would check your starter it may be seazing from the cold

Posted on Jan 31, 2009

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1994 Chevy s10 was starting and idling rough when engine was cold, but when warm ran fine. Now engine will turn over but wont start. Help please.


Check if your fuel pump works ( check your fuel pressure in the port in the injectors ) check if you have spark in the sparkplugs.

May 01, 2014 | Cars & Trucks

1 Answer

Cant get power to fuel pump 1994 toyota truck


why guess.?
ever seen a volt meter,?

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.
why not?
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.
fixed many.

Dec 10, 2013 | 1994 Toyota Pickup

2 Answers

I have a 1987 ranger 2.3 EFI and sometimes it will not start when it's cold. after it warms up outside it starts. When it does start it runs great. It always starts when warm. some times it will


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

Oct 01, 2012 | 2002 Ford Ranger Regular Cab

2 Answers

Bronco would not start changed fuel pump relay ran


have you checked your mafs that sounds like it the problem clean it witha mafs cleaner

Jan 08, 2010 | 1992 Ford Bronco

1 Answer

Replaced fuel pump now wont run right once warm


If it ran normally before changing fuel pump, you probably have a bad aftermarket pump out-of-the-box. Try "thepartsladi" store on eBay for low price OEM.

Dec 23, 2009 | 1994 Oldsmobile Bravada

2 Answers

Runs fine till warms up then losses power and dies


Does the fuel line still have 55 PSI when engine warmed up? Any other codes show up?

Aug 22, 2009 | 1998 Chevrolet Blazer

1 Answer

1988 lincoln continetal new fuel pump acts like it is out of gas


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.
Greg

Jul 15, 2009 | 1988 Lincoln Continental

1 Answer

No power to fuel pump


have you tried changing the fuel pump relay under the hood? it may be old, and the cold could be having an effect on it.

Dec 18, 2008 | 1983 Toyota Pickup

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