Question about 1987 Ford F 250

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Turrns over strongly,will not fire

Got fuel,turns over,no start, no spark,from plug wire or coil wire

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Bad coil

Posted on Nov 19, 2009

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1994 f150 4x4 super cab 5.0 turns over but wont start, fuel pump turns on, replaced coil, cap, rotor, plugs and wires?


Hello! Even though you have replaced coil, cap, rotor, plugs and wires; I need to know that you have a strong blue spark at a plug...Have you checked a plug for spark? I don't want you to misunderstand why I'm asking you that question; Certainly not to insult your knowledge but I need to know for sure that there is a strong spark...Guru..............Saailer

Aug 24, 2011 | 1990 Ford F150

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Driving down road and it was like u just shut it off and now it will not start it has fire,compression,and fuel and does not have a broken timing chain


Is the fire and fuel actually reaching the combustion chambers, or just to the coil and fuel regulator. If fuel and spark and compression are all present, and the timing is correct, there is nothing to stop it from starting. Something has to be missing from the equation. Try to start the engine, then pull a spark plug. If it's getting fuel it will be wet with gasoline. Now, with the spark plug still attached to the plug wire, lay the spark plug where you can see it while cranking the starter. There should be a bright bluish white spark at the tip of the plug. If the spark is weak and yellow looking, it may not be strong enough to fire the air fuel mixture.

Mar 13, 2011 | 1995 GMC Sierra

1 Answer

WONT START AND TRIES TO TURN OVER BUT BACK FIRES


AWESOME a real camaro problem.
backfire.
strong odor of gas because the gas isn't getting burned
caused from backfire. backfiring because the spark isnt sparking when its supposed to.
problems could be bad spark plug wires , bad plugs , bad ignition parts.
your gonna need to check wires for bad spots, check ignition coils and stuff like that. if all that stuff is ok, then your problems have to do with inside the engine. jumped time etc.

Jul 31, 2010 | 1993 Chevrolet Camaro

2 Answers

1999 Dodge Intrepid 2.7L Replaced starter,


Here is a pic of a schrader valve. They all look about the same.3.jpg
If there isn't much pressure, cycle the ignition without turning the engine over and try again. If it is still weak, you may need a new fuel filter. If it is strong, you may have dirty or clogged fuel injectors.

It may be spark, but I'm inclined to think it is fuel related.

Good luck, and keep us in the loop!
JT

Mar 15, 2010 | 1999 Dodge Intrepid

1 Answer

#2 clyinder not firing in a 02 eldorado with 19000 miles on the car


There are several possibilities.
Based on the year (2002) and low miles (19,000) it probably has the original Plugs, Wires and Coil. Rubber insulation on Wires does dry rot over a period of time. Spark Plugs should be changed about every 3 to 4 years regardless of miles. Wires should be replaced every other Spark Plug change. Translated you should be on you 3rd set of Spark Plugs and 2nd set of wires.
When working in the engine compartment and with the electrical system remember: ther is 40,000 to 75,000 volts present. Bad Wires could mean an electrical shock!
You can cheaply purchase Ignition (Spark Plug/Wire/Coil) Test Kits at most auto parts stores or even at Harbor Freight.
1) Remove the #2 Wire connection to the #2 Coil position.
2) Insert the tester into the #2 Coil position. Clipping the other end onto the engine block or onto a good ground.
3) Start the Engine.
4) You will be looking for a good strong (blue) and rhythmic spark. If it is not strong (yellow or orange) nor rhythmic, the Coil is malfunctioning and should be replaced.
5) If it is a good rhythmic spark, Turn OFF the Engine.
6) Disconnect the Tester and reconnect the #2 Wire to the #2 Coil position.
7) Disconnect the #2 Wire from the #2 Spark Plug.
8) Connect the Tester into the end of the #2 Wire. Clipping the other end to the engine block or a good ground.
9) Start the Engine.
10) Again you are looking for a strong (blue) and rhythmic spark. If is not strong (yellow or orage) and rhythmic, the Wire is bad and should be replaced. Wires should always be changed as a Set is the standard rule.
11) If it is a good rhythmic spark, Turn OFF the Engine.
12) Remove the #2 Spark Plug out of the engine.
13) Check the Igntion end of the Plug for carbon, dirt, or being fouled. Check the Gap.
14) Insert the #2 Spark Plug back into the #2 Wire.
15) Using the Spark Plug Tester. Connect the Tester to the #2 and clip the other end to the engine block or a good ground.
16) Start the Engine.
17) Once again you should be checking for a strong (blue) and rhythmic spark. If it is not strong (yellow or orange) nor rhythmic, the Spark Plug could be malfunctioning.
18) Clean the #2 Spark Plug.
19) Regap the #2 Spark Plug.
20) Retest the Spark Plug.
21) If there is now a strong (blue) and rhythmic spark, then the #2 Spark Plug is now good.
22) If there is not a strong (yellow or orange) nor rhythmic spark the #2 Spark Plug is malfunctioning and needs to be replaced. Again the standard rule is to replace the Spark Plugs as a set.

The several other possibilities relate to sensors. However without additional error codes or the check engine light on, we will assume that the problem can be solved with the solution above.

Let me know if this helped, or if you have additional information or questions. Feel free to contact me at FixYa.com!

Feb 17, 2010 | 2002 Cadillac Eldorado

2 Answers

1995 ford explorer doesn't start, crank & cam sensors replaced


Does you fuel pump delivers fuel. Is it there a spark.

Dec 29, 2009 | 1995 Ford Explorer

3 Answers

No spark to the coil


No spark to the coil or is it no spark from the coil? First verify that you have 12 volts to the coil when you turn ignition switch on if not you will never have spark from the coil going to the plugs. If you do have 12 volts to the coil and still no spark you have a bad coil. To see if the coil is firing, unplug a spark plug wire from it's plug and hold it to a chasis ground while attempting to start the vehicle. There should be a strong spark and popping sound. Remember to wear leather glove or thick work glove if holding the wire by hand to avoid shock. If there is a strong spark then coil is good.

Sep 25, 2009 | 1997 Chevrolet Express

1 Answer

1990 5.0 ford mustang turns over strong, but won't start. doesn't appear to have fire.


Hearing the fuel pump still doesn't verify it has fuel pressure.
Could be the coil is shot. Can you verify 'spark' ?
Lets go thru the very basics first. I will try to run you thru the tests. Fuel pressure - you need the correct gauge attached to the fuel rail. For spark you can get by - by pulling one plug and holding it by the plug wire boot (put it back in the boot for this part), and then ground it to a head bolt, and have someone turn the motor over while you verify for a strong, blue spark. Yellow or red indicates a bad coil or part in the ignitio system.

Jun 22, 2009 | Ford Mustang Cars & Trucks

1 Answer

Motor won't start


You need 3 things for a start condition 1 spark 2 fuel 3 compression. If you have lost spark and have changed wires and coil then you should look at the crankshaft position sensor. This sensor tells the computer when to fire the coil and which plug to fire. Hope this helps. I will check back on the 14th.

May 14, 2009 | 1990 Jeep Wrangler

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