Misfire and now no start/fire
2001 Saturn SL2

Misfire and now no start/fire

(2001 Saturn SL2)
I did a full tune up on my sister-in-laws car, new plugs (ac delco) plug wires, o2 sensor, made sure the plugs were gaped proper, car ran OK prior to the tune up but was overdue by 40k/mi. After the tuneup, car ran rough like it was out of time but was more noticeable when test driving it... had a loss of power while stopped at a light and even stalled. Top end can had no miss, low end, felt like a vacuum issue/misfire. Took car to Auto Zone and had a diagnostic test done, PC codes came back o2 and Cam Sensor... this car has no cam sensor, and I had already replaced the o2 sensor. Got the car back to the house, still running rough, decided to put new coil packs on, now the car will not fire at all. There is gas getting to the plugs, but no fire, sounds similar to reversed timing however not sure how that is possible. Made sure that the wires are going to where they are supposed to. Installed a new Crank Sensor last night, and still no fire. The book says that the firing order is 1/3/4/2 however, the coil packs say 2/4/1/3 which is confusing. One online reference says that the first cylinder looking left to right is 1/2/3/4 and another reference says it is 4/1/2/3.

I am at wits end. The mechanic shops up here "rape" people, I have never seen such immoral charges before, In Va Beach, Va... a tune up for that car is $120, here in MI they want $540. Can anyone give me any idea as to what would cause this issue? I have even gone as far as to put the old plugs and plug wires back on in case there wan a issue with the new ones but the car still will not fire.

Thank you.

Derek R.
N. MI
2 answers & 3 comments
Popular Answer
on September 11, 2010
sure sounds like a fire order problem.go back to the old coils and o2 sensor.static time number 1 cyl. and check timing marks on timing belt.If car ran ok b4 you started retrace your steps and untune the motor.
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on September 11, 2010
checked timing chain, and its perfect, also checked the cams while turn over and all looked great. Plug 1 is getting spark, fuel getting to plugs properly. Motor has compression, just will not fire! Still no Saturn Service's will answer their phones, called the two dealerships in Virginia and no one wanted to talk about it, "just bring it in"... N. MI to Va is a bit too far to tow this thing...

did the un tune, still nothing.
on June 03, 2016
I have had 3 Sl's95,2002, and now I own a 2000 sl2 automatic, of the 3 my first 2 sl1's. Were the best my 95 had over 250,000 and my 2002 was bulletproof both with 5 speed manuals 02 had 347,000 miles on it, i replaced injectors(all) fuel pump, water pump, hub bearings, radiator, battery and cleaned the EGR twice since I owned it and the blower n blower resistor switch and ECT , that was done over the 347,000 miles car never burn any oil at ALL, I kept regular oil changes every 3000 miles with Z-MAX addiitive, using mobile5000 SAE 5w30 only, because these motors clicked n pinged with synthetic oil, getting back to my SL2 i have put in new radiator trans. Cooller lines hub bearing, EGR solenoid canister, both upstream n downstream O2 sensors , AC delco wires with plugs, battery, ECT temp sensor new thermostat new brakes n calibers, drums in back with hardware, stabilizer links, transmission valve body(twice) input shaft nut and retorque and now I have the same issue u r having, the sl's have had problems with coil pack left or right or the main issue can be electronic control module, thats what your coils sit on top of, they create the SPARK Replace it, test your coils,quick way pull the wires off the coil packs on the car and have someone turn it over while u watch the the coils. They should normally spark a pretty blue between them both. Left n right, if they don't there no good or the module is not, and because u sometimes only notice your misfires out on the road its hard to detect the coils being bad or module so switch coils firsted and see if the misfires follow, if they don't than its the module.....also the other thing to test is pull out your front O2 upstream sensor, and take for a cruise to see if your power comes back if it doesn't your catalytic converter is plugged , if no change, check for a bad injector,
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on September 11, 2010
sure sounds like a fire order problem.go back to the old coils and o2 sensor.static time number 1 cyl. and check timing marks on timing belt.If car ran ok b4 you started retrace your steps and untune the motor.
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on September 11, 2010
checked timing chain, and its perfect, also checked the cams while turn over and all looked great. Plug 1 is getting spark, fuel getting to plugs properly. Motor has compression, just will not fire! Still no Saturn Service's will answer their phones, called the two dealerships in Virginia and no one wanted to talk about it, "just bring it in"... N. MI to Va is a bit too far to tow this thing...

did the un tune, still nothing.
on June 03, 2016
I have had 3 Sl's95,2002, and now I own a 2000 sl2 automatic, of the 3 my first 2 sl1's. Were the best my 95 had over 250,000 and my 2002 was bulletproof both with 5 speed manuals 02 had 347,000 miles on it, i replaced injectors(all) fuel pump, water pump, hub bearings, radiator, battery and cleaned the EGR twice since I owned it and the blower n blower resistor switch and ECT , that was done over the 347,000 miles car never burn any oil at ALL, I kept regular oil changes every 3000 miles with Z-MAX addiitive, using mobile5000 SAE 5w30 only, because these motors clicked n pinged with synthetic oil, getting back to my SL2 i have put in new radiator trans. Cooller lines hub bearing, EGR solenoid canister, both upstream n downstream O2 sensors , AC delco wires with plugs, battery, ECT temp sensor new thermostat new brakes n calibers, drums in back with hardware, stabilizer links, transmission valve body(twice) input shaft nut and retorque and now I have the same issue u r having, the sl's have had problems with coil pack left or right or the main issue can be electronic control module, thats what your coils sit on top of, they create the SPARK Replace it, test your coils,quick way pull the wires off the coil packs on the car and have someone turn it over while u watch the the coils. They should normally spark a pretty blue between them both. Left n right, if they don't there no good or the module is not, and because u sometimes only notice your misfires out on the road its hard to detect the coils being bad or module so switch coils firsted and see if the misfires follow, if they don't than its the module.....also the other thing to test is pull out your front O2 upstream sensor, and take for a cruise to see if your power comes back if it doesn't your catalytic converter is plugged , if no change, check for a bad injector,
on September 10, 2010
My suggestion would be to make sure the spark plug wires are on correctly. The cylinders are numbered 1-4 from the front of the engine to the back - The front is where the drive belts are. The wire on the coils should be as follows 41 23. With 4 being toward the front of the engine.
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on September 10, 2010
ended up being a weak coil pack, even new outta the box, was still weak, and the hesitation was long fuel pressure! Thanks for all the advice! Posting so that if anyone else ever has the same or similar problem, might help!

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