Question about 1994 Ford F150 Styleside Supercab

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I have a 1994 ford f-150 5.0 engine. It will not start except with starting fluid. It has 45 psi fuel pressure, good spark to spark plugs, timing is dead on. It has no pulse to injectors while starting, when hit with starting fluid, it cranks right away & I get a pulse to the injectors, it will run all day until shut off & will not restart. Customer had replaced TPS a few months ago. At wits end!

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It sounds like the (iac valve) idle air controle valve. When its running unplug it and if the truck shuts off replace the iac. it runs about $50 to $60

Posted on Dec 24, 2008

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Why won't 89 Chevy Silverado 1500 5.7 STILL not start. New battery,coil,spark plugs,wires,inline filter,distributor,cap,rotor,fuel pump,starter relay.


What's missing ? Fuel ,spark , compression ? How many miles on the vehicle ? Does it have spark , pull a plug wire while cranking an hold it near a good ground . Put a fuel pressure gauge on the vehicle , is there fuel pressure ? Do a compression test , 150 psi . engine mechanical problem . timing chain .

Nov 14, 2015 | Cars & Trucks

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WHEN I GIVE IT GAS IT START TO MISFIRE


Misfires are caused by one of 3 things-gas, spark, or compression-one of those is the problem. For gas, check the fuel pressure and see if it is at the right pressure for your car. Low fuel pressure will cause misfires. If pressure is good, it could still be an injector problem, like a clogged injector. If low pressure, suspect the fuel pump or the fuel filter.
For an ignition spark problem, check your spark plugs. Pull them out and inspect them for broken or cracked plugs, check the spark plug gap, check for oil fouled plugs. You may be able to isolate the misfire to a cylinder or two by the plugs condition. A misfiring plug or cylinder should show more black, sooty deposits than the other plugs. A normal firing plug will have a tan or brown colored insulator on the end with very little deposits. If the plugs are okay, clean them a bit if needed, and check for spark on the spark plug wire ends with engine cranking. Buy an inexpensive spark tester, or hold each spark plug wire metal end terminal 1/4 inch from a ground on the engine block, while cranking the engine. Wear a heavy glove to avoid getting shocked. Check that every cylinder is getting a strong blue spark to eliminate ignition as a problem. A weak, yellow or orange spark is an ignition problem, possibly a bad coil, or other ignition part.

If spark and gas is good, you may need to check engine compression. Any cylinder that has significantly lower compression than the other cylinders will cause a misfire, and set a misfire code. You should check for any trouble codes in the engine computer. A code reader or scanner would have to be connected to the diagnostic connector under the dash. What is "significantly lower" compression? About 15-20% less compression. Say you checked and had 150 psi compression in most cylinders. If one had 20% lower compression ( 150 X 20%= 30 psi, 150 -30 =120 psi, or same as saying 150 X 80%= 120 psi.), a condition like that can cause a misfire. I hope I have made sense here. Good luck, and post back what you find, or if any questions.

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2001 Pontiac Grand Prix GT 3800 won't start!


it sounds like it kicked the timing chain , the last time you shut it off

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We have a 1995 ford escort 1.9L it has spark the timing is ok it has a new crank sencor the starter is good and so is the altantor has new spark plugs but it will not start


Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.



From start to end troubleshooting these problems I suggest you to check the help link below and follow its procedure: -----


Mostly all types of car no start problems are discussed here with solutions:--------




CAR NO START: ENGINE NOT TURNING OVER:
http://alltypesofpartsreplacing.blogspot.com/2012/11/car-no-start-engine-not-turning-over.html


---------
These will help.
Thanks,.

Dec 07, 2012 | 1995 Ford Escort

1 Answer

1996 suburban with 5.7l have good fuel pressure, sparks at the plugs, cranks with starter fluid but wont crank when i disconnect the crank sensor.


when you say good fuel pressure is it 55 psi with the key on and engine off? any thing less then 50 psi will not start the engine. if the engine starts with starter fluid then the problem is in the fuel system.

Aug 13, 2011 | 1997 Chevrolet Suburban

1 Answer

45 psi fuel pressure good spark new distributor new control module new fuel pump and filter wont start unless u use ether any ideas?


check your plugs confirm that you have the proper fuel pressure make sure your wires are all in good order good luck.

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