Question about 1995 Buick Regal

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Will not start, checked the coil, and changed modulator. Spark plugs do not spark. Anything else I can do, checked the fuel line, it makes a sound that it wants to start but it does not start.

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Check crankshaft posisition sensor.

Posted on Apr 25, 2010

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97 oldsmobile achieva wont fire changed coil pack spark plugs cam sensor still wont start


Make sure battery has a full charge and battery connections all good.
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 having a problem with more than one system, I want to check for rpm signal, that usually comes from the crank sensor. Not sure why you replaced cam sensor? I always want to check sensor wiring circuits before replacing anything. Don't replace anything unless your testing points in that direction.

Nov 04, 2016 | Oldsmobile Cars & Trucks

1 Answer

I've got a 2005 chrysler 300 and it won't start I have changed fuel pump, camshaft and the crankshaft sensor coils and spark plugs and i still wont start what could be causing it not to start?


Try to determine if it is fuel or ignition related.
Turn key to on, do you hear the fuel pump turn on for a couple of seconds? It should come on briefly to pressurize the lines and fuel rail on the engine. Do you have fuel at the engine under pressure? Easiest and preferred way is to check fuel pressure with a pressure gauge at the test port on the fuel rail. With key on, pressure on mpfi systems should be 40-50 psi.
If there is gas in the fuel rail, test ignition by checking for spark on the end of a plug wire, with the engine cranking over. If you have a blue snapping spark, then ignition is probably good-may want to check more than one plug wire. Hold the metal terminal end of plug wire 1/4 inch from a ground on the engine, the engine block or a bolt or metal bracket. Verify a blue snapping spark, repeatedly, as the engine cranks. An orange spark, intermittent spark, or no spark points to an ignition problem. One thing you haven't changed is the ignition control module. This module, when signaled by the pcm, is what cuts the primary current to the coils for spark to be generated.

If you have both gas and spark, check the fuel injector circuit. Post back if you need help with that. There should be an injector fuse that needs checked. Also a fuse for the fuel pump, if no pump action, besides the fuel pump relay.

Apr 04, 2014 | 2005 Chrysler 300

1 Answer

I HAVE OPEL VECTRA B(ENGINE X16XEL)MODEL 1999 THE ENGINE SHUTDOWN SUDDENLY DURING DRIVING AND NO FAULTS ARE RECORDED IN THE ECU


Check gas and spark. Check if fuel pump is still working. Do you have fuel pressure? Or can you check the fuel pressure? With key on, the pump should have put fuel under pressure in the lines and up to the injectors.
Check ignition system by checking for spark at one of the spark plug wires, with the engine cranking over. You need to see a blue, snapping spark to know the ignition system is good. If no spark on one wire, check another or all of them. If no spark, and no trouble codes-could be a bad crank position sensor. This sensor helps the computer calculate the timing of the spark, the main sensor the computer uses to signal for spark. It signals to the ignition control module (which controls the coils and the primary current to the coils ((the coils-where high voltage is created to cause spark at the plug)) ). So no spark? Could be a bad crank sensor...or a bad ignition control module...
If you have a single coil and not a coil pack, you might want to test that coil, but if shut down while driving, sounds like computer related, so check ignition controls: that would be crank sensor or ignition control module, or in worst case a bad PCM.

Jan 07, 2014 | Cars & Trucks

1 Answer

MY 1999 MONTE CARLO WON'T START, ORIGINALLY THOUGHT IT MIGHT HAVE BE THE FUEL PUMP BUT, CHANGED THE FUEL PUMP, AND FUEL FILTER, FUEL RELAYS, AND SPARK PLUGS AND STILL WON'T START


even though , you changed the spark plugs, were you getting any spark before you changed them, if you didn't check for spark, i would check out the coil, for spark, you can do this by removing 1 of the spark plug wires and ground it, then have someone to crank over the engine, to see if spark is present, if no spark, i would check the ignition control module inside the distributor.

Mar 17, 2011 | Chevrolet Monte Carlo Cars & Trucks

2 Answers

I have no spark in spark plug wires. I changed the crankshaft sensor, the 3 coils, the spark plugs, and spark plug wires, and the ignition module.


Sounds like a bad computer. Check that power is present at the coils from battery. Check computer to see if you get a code 12 which is diagnostic mode. If computer is fried it usually won't read code 12.

Mar 20, 2010 | 1993 Chevrolet Lumina

1 Answer

1999 Ford Explorer keeps turning over but doesn't start. what is the problem?


There are 2 things to make it started: Spark and Fuel. Check out to see if there is a spark on the spark plug. If there is no spark, then check the coil pack back to the ignition module. Check out if there is fuel to make spark plug wet after several cranks. If there is not, then check the fuel pump. fuel filter, injectors module and injectors. Good luck.

Nov 14, 2009 | 1999 Ford Explorer

1 Answer

TWO DAYS AGO 94 RANGER (4 CYL) SOHC...STOPPED ON ROAD. CRANKS BUT DOES NOT START. HAS FUEL PRESSURE. CHANGED FUEL FILTER. CHANGED AIR FILTER. CHANGED ONE OF THE DISTRIBUTOR COILS...TWO SPARK WIRES WERE NOT...


If all the coils are giving spark now,then you moat likely have gas fouled plugs now,so change them out with new ones,all 8 of them.If you do not have spark on all plug wires,pull the timing belt cover,and align the cam shaft and the cam,to see if the belt has jumped.If It hasn`t,replace the crankshaft sensor.

Oct 17, 2009 | 1994 Ford Ranger Supercab

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