Saturn SC! misfire

ryder1964 · 12-11-2006, 10:28 PM

I have a 97 SC1 that has no fire on cyl. 1 and weak on cyl 3. Had the coils and ign. mod. check, they were ok. New wires and plugs. Any suggestions?

SaturnManiac · 12-11-2006, 10:34 PM

Start with new plugs and wires, cleaning the coil packs. Do a compression test on all cylinders and report the numbers back here. Was there any oil on the previous spark plugs?! Also, the car doesn't have platinum spark plugs, does it?! Also, try running some fuel injector cleaner through....I recommend Chevron. You may have a bad fuel injector...or just a dirty one. It could possibly be something else, but let's start with the easier and more common stuff first.

Also, do you have an SES light and what codes did it set?!

ryder1964 · 12-11-2006, 10:38 PM

replaced plugs and wires. cleaned packs. used a tester on each wire. #1 was not firing and # 3 was weak. Had coils and ing. mod checked and they were ok. switched coils around but no change

SaturnManiac · 12-11-2006, 10:51 PM

What happened when you switched the wires?!

ryder1964 · 12-11-2006, 10:54 PM

same thing, has no fire on cyl. 1 and weak on cyl 3.

Alex_SC2 · 12-11-2006, 10:55 PM

Quote:

Originally Posted by ryder1964

replaced plugs and wires. cleaned packs. used a tester on each wire. #1 was not firing and # 3 was weak. Had coils and ing. mod checked and they were ok. switched coils around but no change

Make sure all the contacts on the ignition control module are clean and corrosion free. It's the plate that the packs bolt on to... make sure the ground connections to the engine block are clean too.

ryder1964 · 12-11-2006, 11:01 PM

Yeah cleaned that too. I did put some dielectric on the ign. mod. between the plate and the coils.

Alex_SC2 · 12-12-2006, 12:12 AM

Did you clean between the plate and the engine block?

12-11-2006, 10:34 PM	#2
SaturnManiac Master Member Join Date: Feb 2006 Location: Near VA Border Posts: 3,648 SaturnManiac's Photos	Re: Saturn SC! misfire Start with new plugs and wires, cleaning the coil packs. Do a compression test on all cylinders and report the numbers back here. Was there any oil on the previous spark plugs?! Also, the car doesn't have platinum spark plugs, does it?! Also, try running some fuel injector cleaner through....I recommend Chevron. You may have a bad fuel injector...or just a dirty one. It could possibly be something else, but let's start with the easier and more common stuff first. Also, do you have an SES light and what codes did it set?! ... R.I.P. - My 1996 Saturn SL2, "Psycho" - 7/95-2/17/06 R.I.P. - My 2000 Saturn SL2, "Sexy" - 11/24/99-8/05/08 If you're a car begging for your life, wouldn't you want someone to add fluids?

12-11-2006, 10:38 PM	#3
ryder1964 New Member Join Date: Dec 2006 Posts: 9	Re: Saturn SC! misfire replaced plugs and wires. cleaned packs. used a tester on each wire. #1 was not firing and # 3 was weak. Had coils and ing. mod checked and they were ok. switched coils around but no change

12-11-2006, 10:51 PM	#4
SaturnManiac Master Member Join Date: Feb 2006 Location: Near VA Border Posts: 3,648 SaturnManiac's Photos	Re: Saturn SC! misfire What happened when you switched the wires?! ... R.I.P. - My 1996 Saturn SL2, "Psycho" - 7/95-2/17/06 R.I.P. - My 2000 Saturn SL2, "Sexy" - 11/24/99-8/05/08 If you're a car begging for your life, wouldn't you want someone to add fluids?

12-11-2006, 10:54 PM	#5
ryder1964 New Member Join Date: Dec 2006 Posts: 9	Re: Saturn SC! misfire same thing, has no fire on cyl. 1 and weak on cyl 3.

12-11-2006, 11:01 PM	#7
ryder1964 New Member Join Date: Dec 2006 Posts: 9	Re: Saturn SC! misfire Yeah cleaned that too. I did put some dielectric on the ign. mod. between the plate and the coils.

12-11-2006, 10:28 PM	#1
ryder1964 New Member Join Date: Dec 2006 Posts: 9	Saturn SC! misfire I have a 97 SC1 that has no fire on cyl. 1 and weak on cyl 3. Had the coils and ign. mod. check, they were ok. New wires and plugs. Any suggestions?

12-12-2006, 12:12 AM	#8
Alex_SC2 Member Join Date: Sep 2006 Location: Kitchener, ON (Canada) Posts: 219 Alex_SC2's Photos 2002 SC2	Re: Saturn SC! misfire Did you clean between the plate and the engine block? ... Human salvation lies in the hands of the creatively maladjusted. 2002 SC2 - 80,000km so far... 1989 Suzuki Katana 750 - Cheap thrills!

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