Question about 1989 Ford F 150

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Truck wont start

Spark plugs dont fire. How do i check coil. Have power to positive side, negative side flashes, while cranking engine.

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So it is flashing it means it is getting signal to coil but coil is dead

Posted on May 05, 2010

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It mayI have no fire going to the coil or from the coil to the plugs


Have you checked the wiring, the spark @ plug, Power to the coil???

Engine Won't Start No Spark - Auto Diagnosis Repair Help

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Jan 27, 2016 | Cars & Trucks

1 Answer

I have a 1990 nissan sentra that will crank but wont start no fire from coil


Check for power on the + side of the coil with the key on Then using a test light check for a "pulse" on the negative side of the coil by attaching the clamp side of the test light to ground and the point to the negative side of the coil while cranking. If there is no pulse then it most likely needs a distributor. If there is a pulse but no spark then it needs a coil.

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95 toyota camry wont start wont crank turn of the key and nothing


the (knock sensor) crank position sensor...is just behind the harmonic balancer, (lowest pulley on the motor) on the block, usually on the left side.
i would check the coil first though. sounds to me like a no spark issue.

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1 Answer

Pu t in new coil and distrubtor cap and rotor put in new electronic module not firing wont start


No spark at the spark plug? It may be the pick-up coil inside the distributor. This is the sensor that tells the computer the engine's crank position.
If the ignition switch is good, you should have power at the coil's + terminal when key is on. You might check for that.

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1 Answer

Customer stopped to get gas and car wont start. checked and has no fire


sounds like your ignition coil or control module are shot. Either can cause this problem.
If all plug wires are dead, no spark, and the module has power and ground suspect crank angle sensor. Of course sensor will break opon removal from engine block 4Cyl but in VA NAPA sells the sensor for $9.00. On the distribitorless system the crank sensor, module, and coils are all piggybacked in the same location, back of engine and is very difficult to service. When I was working as a auto tech we had allot of trouble with crank sensors and ign coils.
Before you jump to any conclusions. If your starter is cranking the engine at a normal speed(use your judgment), and you preformed all test for spark, such as pulling wire off spark plug and connecting positive end of volt meter into plug, and negative end to ground, you should see a definite deflection on an analog meter. All test and still no spark. DON'T forget to check your fuses and fuseable links in the starting and charging system. THIS must be done first. 50% chance, this is where your problem lies.

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1990 honda wont start or crank, the lights dont come on, head or inside the car


The distributor in the hondas has a function of also engaging the coil to create spark. No spark = no fire. Perhaps take a plug out, leave the lead on, hold it with INSULATED pliers against a solid metal part of the engine and get someone to crank the engine over.

If the plug sparks - coil and firing switch OK. If no spark, check coil first - remove main + feed lead from coil terminals and check on a meter for power with key on but NO motor cranking. No power = faulty distributor/firing switch.No other ideas sorry!

If it won't turn over you may want to check Battery cables for tightness and/or corrosion Starter solenoid Neutral or clutch safety switch

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1 Answer

No start on old gasoline forklift engine.


most likely the ign switch is ok if you are getting spark. so you have a hot spark at coil and weak fire at plugs? if you have a test light check the positive side of coil for power when turning key on and cranking. if it is dropping power on positive side then ign switch could be bad. can "hotwire" coil by jumping a wire to positive side of coil to pos of battery this will eliminate ign switch.

Apr 07, 2010 | 1978 Chevrolet C1500

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2005 gmc safari wont start checked coil spark


how much fuel pressure you have when turn key on

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Spark plug firing order


check the ignition coil power source...get a test light & check for power with the key on @ the positive side of the coil...if it does have power have a friend crank the engine over & check the negative side for a flashing light..if it does then make sure you have spark @ the coil if not replace the coil

Mar 20, 2009 | 1999 Mazda 626

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