Question about 1990 Ford F150

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Have a 1990 F150 5.0 efi 4x4 automatic.truck cranks up untill it gets warm then shuts off.fuel pressure is good and i changed spark control,map,iac,temp,tpi,sensors still same thing ..please help

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  • Ford Master
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Did you change the stator inside the distributor?? That is likely the problem, they were a very poor design, I have changed 100's o fthem in early F series trucks like yours.

Posted on Feb 17, 2012

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6ya6ya
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Posted on Jan 02, 2017

  • 85 Answers

SOURCE: 1990 Ford F-150 flooding very badly

ok change the coolant temp sensor it will make it rich if it is bad good luck.

Posted on Nov 24, 2008

  • 1 Answer

SOURCE: 1994 bronco 4x4 302cid efi wont start under cold conditions

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

Posted on Jan 31, 2009

  • 105 Answers

SOURCE: Alignment on 1990 F150 4x4 I was quoted $560

way to high,they been smokin crack

Posted on Jan 31, 2010

1991fordf150
  • 59 Answers

SOURCE: 1990 F150: I have a 1990 Ford F150 4x4 with a 5.0 302 that wi...

i would remove the fuel line at the carb and crank the motor and see if there is fuel going to the carb if not check the fuel pump and see if it is getting any gas

Posted on Jun 03, 2010

  • 335 Answers

SOURCE: 1990 ford f150 302 efi poor fuel mileage, i

Check/clean your egr valve and oxygen sensors.

Posted on Jan 26, 2011

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2 Answers

1997 Prism LSI. It cranks, but why won't it start?


redux 2
not car smart ?
and no photo of your ENGINE so we both fail
hard.


crude video, but is for folks with near zero tools
or shows you clearly why you dont want to do this.

https://www.youtube.com/watch?v=064Ilsz8Fzg&NR=1&feature=fvwp

so get car fixed
use a real mechanic.
see why?

the DIS engine started in July 1997 (mfg,date)
http://www.fixkick.com/PRIZM.html

facts.
so your does have a distributor (google that please)
but 1997 is also a big change, a new engine
end to end. july 1.

no photo of your engine,means NO JOY.
we can not guess engines
or what spark system used due to huge changes
in 1997, all related to USA smog laws.
fact.

Dec 14, 2015 | Geo Cars & Trucks

1 Answer

Not getting fuel


which engine?
my guess, is it really dont start.
so the assumption is not getting fuel.???
got spark? (3 or 4 cylinders , 1.0 or 1.3L)?
compression at spec? 150 min, warm. or hot?
if test fuel works or runs for 3seconds , proving engine is ok but no fueling?
that and only that means not getting fuel.

the fuel pump on many cars does not turn on , until you crank the engine.
The ECU decides this, (software inside) and varies.
some run for 3 seconds key on. others, not. depends on country and year, and engine sizes, (only year was stated)

EFI rules to use:
ECU does not inject if spark is bad. BY DESIGN.
nor at wide open throttle ,cranking (bad TPS?)
all ECU operater the pump, when cranking and running.
so check the fuel pressure with a real gauge, cranking.
only that works.

Apr 22, 2014 | 1994 Geo Metro

1 Answer

2001 suzuki esteem wagon


1.6L or 1.8L vastly different engines... and EFI.
fuel to the rail , only means the pump is active , never good.
28PSI is minimum on all cars. 1psi will never start a car. ever
and the rail will shoot fuel, all day. it fruitless , unless the rail is dead.
see?
First the laws of EFI. (works all gas EFI)
  1. all fuses good.
  2. 12vdc to EFI system , below 10v is bad. (see lamps dim? bingo)
  3. The PCM (EFI brain) will never inject if it sees CMP/CKP or spark primary dead. ever. so, spark is first.
that is double reasons, fuel cant burn if no spark and if ECU
thinks spark is bad it cuts fuel, (fire safety and fuel hydralocking reasons)

so you connect any scan tool to the DLC, OBD2 port , by knees.
and crank for 5 seconds, release key, no turn off
see DTCs (errors) for CMP, or CKP sensors (cam/crank?)
bingo
no, then you crank and look at the RPM PID , live data stream the scan tool, see RPM go to 250rpm cranking, good.
ok , PCM thinks all is good....

i then check the #1 injector with a NOID lamp
i crank it flashes, good.
if not , i do all injectors , if one fails the pcm is dead on this line.
if yes, all dont flash the PCM is seeing some gross errors. ask. why./?
if all flash, then the fuel rail is dead. and your rail test was useless.

until you discloses engine option (size) I cant give spec numbers.
i then connect my fuel pressure gauge $20 tool to the fuel rail test
port, and i get 10psi, FAIL
i check voltage to the fuel pump cranking, i get 8v, bingo bad wiring
or bad fuel pump relay.
say 10psi and 12v at pump cranking,
the pump is bad, or the filter clogged , or the fuel pressure regulator
is stuck wide open killing all legit pressure.

that is how i do it.
keep in mind the PCM cant see fuel pressure on most cars.
some newer cars have this sensors. (nice)
low fuel pressure,. renders the whole EFI , useless. just junk.

Mar 12, 2014 | Suzuki Esteem Cars & Trucks

2 Answers

1990 Buick Century 3.3 L V-6. Starts fine and runs good while i'm parked .


check the temp sensor. and id replace the one bad injector. these engines have problems with the coil pack. id change it with one at a scrap yard.

Mar 25, 2013 | 1990 Buick Century

1 Answer

1995 Chevy S10 V6 4.3L 4x4 Pick up truck wont start


Make sure battery has a full charge. If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you have tbi fuel injection, fuel pressure is 9--13 psi.
If you have cmfi fuel injection, my info says 55--61 psi.

Apr 24, 2017 | Cars & Trucks

1 Answer

Runs fine until it gets warm or hot then cuts off then cools and will recrank


Does it crank over when the engine is hot. If it does sounds like your maybe loosing fuel if so check fuel pressure if t is good check for spark could be a bad crank sensor or bad distributor.

Jan 19, 2013 | 1994 GMC Jimmy

1 Answer

The fuel pump relay is the EFI relay in trhe fuse box under the hood right fender. I replaced it and the pump is working I can smell the gas. The truck still will not start. any sugestions?


Have you checked to see if it has spark at the spark plugs, let me know. Actually there are two relays for the fuel pump, the EFI relay and the circuit opening relay, the circuit opening relay gets voltage from the EFI relay. If the computer doesn't get a spark confirmation signal while cranking then the injectors are shut off.

Oct 22, 2011 | 1990 Toyota Pickup

1 Answer

Toy turns over but wont run change fuel filter n fuel pump still


The fuel pump should run for a second or two when you first turn the key on, but then shuts down to prevent the engine from flooding if the computer does not get a signal from the crank or cam sensors which the computer uses to trigger the ignition system. So no spark no fuel. Check to see if you have a spark in the ignition system.

Aug 28, 2009 | 1990 Toyota Camry

2 Answers

Toyota wont start


get the comprestion tested on all cylinders.

Jul 04, 2009 | 1990 Toyota Camry

2 Answers

1989 truck stalls when hot.


Have you chg. fuel filter? If so, best to do a fuel pressure test, sometimes( not always) when the pump gets warmed up they can loose a little pressure and thats all it takes just a few # under recamended p.s.i and the truck quits running, you may hear the pump run but its not putting out the correct pressure until it cools down and it starts working again, but after a while quit all together.

May 27, 2009 | 1989 GMC K1500

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