Question about 1996 Jeep Grand Cherokee

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Won't start, replaced distributor pick-up and ignition coil, checked wiring, still won't start Fuel pump pressure is good

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Does it have spark?It could be the ignition module,witch might be in the computer on this model.

Posted on May 05, 2010

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1996 sierra vortec 350.engine cranks but wont start.acts like it trys to fire when you let off key

First thing I would check on a GM brand truck that wont start is the fuel pressure. Many parts stores have tools you can borrow or rent. Head there and grab a fuel pressure tester. And ask them if they know the specification for fuel pressure on your truck. If this is not an option you can always try squirting a shot or two of carb cleaner or a shot of starting fluid. (Be careful! Highly flammable stuff!!) If the squirt helps it start and run briefly look into the fuel pump and/or wiring circuit. If the fuel pressure is below spec but there, odds are u need to replace fuel pump and filter. If there is no pressure could be bad fuel pump or wiring.
if fuel pressure is within spec then next thing to look at is ignition. Pull the wire off the distributor that comes from the coil and place it next to a clean piece of metal on the engine. While cranking the engine look to see if the spark is jumping from the wire end to the clean metal. If so the coil is good. Next try a wire off one of the spark plugs the same way. Then u know the distributor is working. If the truck is old and hasnt had a tune up in a while that would be a good place to start also. New distributor cap and rotor and new spark plugs and wires would be a good starting point. Making sure the plug wires are in proper order on the distributor and going to the proper spark plugs could also be the cause. Another thing to check is the timing of the ignition from the distributor with a timing light. Hope this is helpful

Jun 09, 2014 | 2006 Pontiac G6

1 Answer

Ignition not firing

Do you have fuel, is your fuel pump working. If you do not have any spark at all, have you been able to check to see if you have power to your distributor. If so and you do have some then it might be either your ignition coil, pick up coil or your ignition control module. Your pick up coil in in your distributor under the plate. The coil is on top of the distributor cap. The ignition module is right under the cap where all your distributor wires connect to. Some part houses can test your ignition module and let you know if good or bad. Good luck.

Mar 22, 2014 | 1992 GMC Sierra K1500

1 Answer

My 1991 Ford Tempo won't start. It turns over but doesn't spark. The battery has been replace, checked fuel pump and spark plugs but it still won't turn on. Help?

change the ignition pick up coil assembly normally located on the distributor under the rotor on the bottom of the distributor or just replace the distributor

Jan 30, 2013 | 1991 Ford Tempo 4 Door

1 Answer

Quatroporte IV 1995 dont start

Check for fuel to the engine first. If there is a pressure test port on the fuel line, turn ignition key to start and let it crank for jsut a second- this will pressurize the fuel line on fuel injected engines. Remove cap from that port and carefully press the tiny button in the center- if you get fuel- check iginition system for spark. If you do not get fuel, check to make sure the fuse to the fuel pump is good and that the wiring to the pump is also good. If you can, check for voltage at the fuel pump. 11.5 volts or higher is fine. If you have voltage and no fuel- replace fuel pump.

For no spark condition, check wiring to the distributor and ignition coil, and check fuses. If you crank the engine in the dark, if there is arcing in the high tension coil or discharging to ground, it will be visible in the dark. Those parts that arc should be replaced. If it has not had a tuneup, replace distributor cap and rotor inside. It may simply be a matter of never having a tuenup. If still no spark, test and/or replace igniter/ignition module and check wireso of the pickup portion of the sytem in the distributor. replace if broken..

Oct 06, 2012 | Maserati Quattroporte Cars & Trucks

1 Answer

I have an 88 Chevy Cheyenne 4.3 V6 with a throttle body. It is acting like gas is not getting into the jets. I checked the fuel filter, fuses, relays, wiring to the jets, and still can't find the...

If the fuel pump does run and there is fuel pressure but there is no fuel injector pulse to the fuel injectors at the top of the throttle body, then the problem is either with the distributor, the ECM, or the wiring between the ignition module inside of the distributor and the ECM.

There is the possibility that the ignition coil is faulty and first check to see if full battery voltage is getting to the "Pos" (+) positive side of the ignition coil when the key is in the "Run" position, and also that full battery voltage is getting through the "Pos" (+) or positive side of the ignition coil and over to the distributor ignition module, dis-connect the wire connector from the ignition module and if battery voltage is not present at the connector to the ignition module with the key in the "Run" position but it is present at the "Pos" side of the ignition coil, then the ignition coil is faulty. If battery voltage is present then check the ohms between the high tension terminal (where the coil wire goes on the ignition coil) and the "Pos" terminal on the ignition coil by first dis-connecting the wires from the ignition coil and then test with the "Neg" lead from the ohm meter in the high tension terminal on the ignition coil, and the "Pos" lead from the ohm meter to the the "Pos" terminal on the ignition coil, and the ohm reading should be between 6,000 and 30,000 ohms and if not replace the ignition coil, and a faulty ignition coil can also damage the ignition module.

The ignition module and the pick-up coil/stator located inside of the distributor is what generates the signal that the ECM (Engine Control Module) uses to time and fire the fuel injectors, as well as the signal to run the fuel pump and the dwell signal timing to fire the ignition coil, and a faulty ignition module can cause any one of these systems to malfunction.

That does sound like a malfunction with the ignition module inside of the distributor, and you can remove the ignition module and have it tested for free at most auto part stores. If the ignition module does test out alright then the problem could still be in the pick-up coil/stator, (it can be tested using an ohm meter by dis-connecting the wire connector from the pick-up coil/stator and the ohm reading between the two wires from the pick-up coil/stator should be between 500 and 1500 ohm's, and both of the wires from the pick-up coil/stator should show an open loop or an infinite reading between each wire and ground) and if the pick-up coil/stator is found to be faulty then replace the entire distributor, or the distributor will have to be dis-assembled to install a new pick-up coil/stator.

If you do purchase a new ignition module be sure that it does come with a silicone grease or a die-electric compound because it is a heat sink and the ignition module will burn up without it.

To install the new ignition module first clean out the mounting surface inside of the distributor. Then completely coat the metal contact surface under the ignition module with a thick coat the silicone grease or die-electric compound and do not leave any of the metal contact surface of the ignition module un-coated with the silicone grease or die-electric compound, and be very careful not to over-tighten the ignition module or it will be damaged.



Jul 13, 2010 | Chevrolet C1500 Cars & Trucks

2 Answers

1990 Isuzu 2.6 L 5 spd. No start.. Fuel pressure is ok, not getting spark. Checked coil, ignition module, distributor, computer and coil wire. No power coming from the coil. Small voltage going into...

assuming you the coil, plugs, cap, rotor and wires are good. check the cam sensor, If you have 12 volts to the coil using a 12v light tester. The cam sensor responsible for sending info to the computer telling it that the cam is turning, then the computer tell the coil to dispurse the charge/sparks to the distributor as distributor distribute the sparks to each plugs from the rotor of the distributor. Replace the cam sensor, it tend to go bad over period of time.

Dec 23, 2009 | 1990 Isuzu Spacecab

1 Answer

Van will not start I have fuel pressure and when cranking it builds oil pressure where do i go from here

Check for spark at the spark plugs. If no spark, remove distributor cap and inspect the inside of the cap and the rotor for obvious signs of wear or damage. Check for spark at the coil wire by removing the coil wire from the center of the distibutor cap, and, holding the end of it close to the engine block, have someone crank the engine. There should be a very strong spark. If there was spark at the coil but not at the plugs, replace the distributor cap and rotor. If there is no spark at the coil, you either have no power or ground at the coil, or the coil is bad. With the ignition ON, there should be 12v at the red wire for the ignition coil. if not, check the fuses. Check for the pulsing ground signal of the ignition coil at the other wire ( I think a white wire) using a test light clipped to battery + while the engine is being cranked. If there is no light, the problem is likely the ignition module or pick-up coil, which is located in the distributor. Make sure that the wiring and connections are in good shape for these items before condemning them.
Pick-up coil should have about 1500 ω of resistance.
Good Luck

Sep 30, 2009 | 2003 GMC Safari

1 Answer

I can crank the truck with no problem. After it idles about 15-20 mins (i think it may reach a certain temp)it wants to shut off. It will not crank again until it sits for about 30 to 45 mins. I have...

The ignition module on this model is bad to go bad,When this truck dies like that again,check to see if it is firing.If it is not giving any spark,replace the ignition module,if it does not fix the problem,replace the pick up coil in the distributor.Ignition coils can cause this also,but the symptom sounds like the module.If I can help,let me know,If you have spark after the engine dies(check for spark after it dies)then check the fuel pressure,and the fuel filter.If the fuel pressure is fine,then the module and the pick up coil need replacing.

Aug 29, 2009 | 1988 Chevrolet K1500

2 Answers

Getting fuel, won' start

hello,ok your fuel pump is working,hoping fuel pressure is also good,how about your ignition system,try to start your engine,then remove your spare plug,determine the condition, have fuel in plug?if yes try to check your ignition side,first check your excees voltage protection,located in fuse box(with aluminuim housing with fuse on top) ,,ty

Apr 29, 2009 | 1993 Mercedes-Benz 190

2 Answers

No fuel no spark 1990 k5 blazer 350

Take off the distributor cap. Check the star wheel that is splined to the distributor shaft that the pick-up coil uses. Make sure this wheel is not loose on the distributor shaft. It is right above the pick-up. If it is loose, replace the distributor. This is a common problem. If it needs one, all the part stores stock the distributor.

Mar 07, 2009 | 1989 Chevrolet S-10 Blazer

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