Question about 1993 Pontiac Bonneville

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The car is not getting spark while starting. I have replaced crank sensor and had ignition module tested and it past. do you have any suggestions,

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Check spark from coil to distributor? no spark bad coil.

Posted on Mar 19, 2011

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1988 pont 6000 quit and would't restart. Generates 42 code. I have shop manual. Flow chart led to ign. module or ecm. I replaced both. The car idled for 20 min. and quit.


I don't know liter size of engine? I don't know exactly what testing you have done? I need more info?
You have dis ignition? Engine cranking, do you have spark at the plugs, proper fuel pressure and fuel injector pulse?
The purple wire with white tracer from ignition module to computer has a dc pulse with engine cranking? With bypass ignition, engine cranking, it's the ignition module that controls spark, during cranking rpms. Did you check voltage and ground for ignition module. With dis ignition, there is a crank sensor? I'm not saying replace anything. I would have replaced the --spark plugs and plug wires, Possibly the ignition coils.
I just don't know exactly what testing you have done?
If you have already done everything I suggested, then, pardon my post. Just trying to help.

Aug 25, 2017 | Cars & Trucks

2 Answers

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

2 Answers

It cranks, but why doesn't it start?


1 What are you working on? 2 Have you tested ignition module and coil(s)? 3 Have you tested crank/cam sensors? 4 Does it set a code?

Mar 07, 2016 | Cars & Trucks

2 Answers

Change the fuel pump and still won't start on a 2002 chevy avalanche


Check for spark to the spark plugs, while cranking the engine. If no spark, you could have a bad ignition module, or a bad crankshaft position sensor. The crank sensor sends a signal to the computer, to start the fuel pump and signals the ignition module to start firing the spark plugs. It also drives the tachometer through the computer (PCM) Powertrain control module. The ignition module can be removed and taken to a parts store to have it tested. The crank position sensor is not as easy to test. Easier to just replace it. Good Luck. But wait, I have seen people replace the fuel pump, checked the fuel pump harness for power, and all was good. However, if the fuel pump does not have a GROUND, it will still not operate. Might want to check that. Have fun.

Apr 12, 2014 | Chevrolet Avalanche Cars & Trucks

2 Answers

It turns but it wont start,it has gas and power


Pull off the coil ignition cable at the distributor and check for spark coming out of coil when cranking engine over. Use a heavy rag or glove to hold the wire 1/4 inch from a metal ground. Should see a strong blue spark when cranking to verify ignition is good. If no spark, check for battery voltage to coil on the coil primary. If you have current to the coil, suspect a bad coil, ignition module, crank position sensor, or cam position sensor, or pcm. The coil, ignition module, and sensors can be tested before replacing.

Jan 29, 2013 | Cars & Trucks

2 Answers

Engine cranks, but no start


First let me say thanks for the effort for our country.
Do you know if the injectors are getting voltage and pulse ground, and if the plugs are getting spark ?
You need to know that to proceed.

Dec 12, 2012 | 1996 Buick Roadmaster

1 Answer

1999 Dodge Ram 1500. Truck has had problems this past week starting, it would turn over but not start, once started I had keep the idle up until the truck was warmed. Now the truck will not start, I have...


First you need to determine if it is spark or fuel.
Try some spray starting fluid or use in inductive timing light to see if there is spark at the plugs.
Then if the problem is fuel, you would need to put a pressure gauge on the line, check the O2, air mass, and temp sensors with an ohmmeter. (bad usually are 0 or infinite)
Could also be relay or control module.
If spark, it could be fuse, ignition switch, or crank position sensor/distributor pickup.

Next time have components tested before replacing them.

Feb 26, 2011 | 1999 Dodge Ram

1 Answer

1990 gmc 6500 topkick with no spark or injector pulse. all 4 wires on the ignition coil have battery voltage with key on. is coil shorted or is the ignition module bad?


You are jumping to conclusions. Slow down.
No spark AND no injector pulse indicates none of the desired outputs were triggered. The ignition module makes spark when it receives a crankshaft position sensor signal, and then transfers control of that spark to the computer after it starts. The module takes its crank sensor signal and generates an RPM count that it forwards to the PCM(main computer) which is used for triggering the injectors and controlling timing. SO, if you had a bad crank sensor OR a bad ignition module, you could lose both spark AND fuel. a coil would not disable injector pulse. modules RARELY fail in a manner that disables RPM reference to the computer causing it to not fire the injectors...At this point, I would TEST the crank sensor as the next step. If its easier, 1 of the wires on the module goes directly there so you can test the crank sensor at the module.

Sep 18, 2009 | 1990 GMC K3500

1 Answer

90 Subaru Legacy with no spark


Have you checked the ignition fuses, or checked for power to your ignition module? You have everything else covered! I hope these ideas will get you running. Best wishes.

Jan 20, 2009 | 1993 Subaru Legacy

1 Answer

Thanks for the help on my 93 buick le sabre ive replaced the crank sensor but it still wont start. cranks over ok. no spark. the ignition module has been replaced


thats weird mmmm make sure than you have power going to the black and pink wire or pink with black stripe wire when you turn the ignition on, i don't know what else to recomend you since im not close to the car but the only coming problems on these cars is the module or the crank sensor, did the module installed on it was new? or used? if not sure or even if is new call to auto zone
and ask them if they test ignition modules for free i belive they do and if tehy do take the module out and take it to them, for testing, also by the time you remove the igniton coils turn the ignition on, and make sure you are geting power to one of the coil conectors, and the only way to get to the conectors is by removing the coils, and if there is not power then your ignition switch or a lecttrical problem is present, also make sure to do a cotinuity test to the wires coming from crank sensor to ignition module, check them for open or short to ground

Jul 20, 2008 | 1993 Buick LeSabre

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