Question about Saturn SC1

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97 saturn sc1, #1 cylinder not firing, b4 new coil, whts next?

97 saturn sc1, #1 cylinder not firing, new coil, sprk wire good, #4 is fine, online article says circuit 633 brn/wht wire volt check, no such circuit that I've found this harness/model. what would be the suggested next step besides pin out of cable wire by wire?

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Vin "7" or '9"???if #4 is firing so is #1. they both fire at the same time. have you swapped the wire with number 4 or another cylinder? have you checked for a injector pulse on #1 fuel injector? Compression on #1 Cylinder?

Posted on Oct 01, 2009

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Posted on Jan 02, 2017

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Car starts and runs but in reverse starts shaking SES lights up and blinks. Have changed the plugs but are getting a P0340. It's an 1998 Saturn 112,000 miles. What could it be?


DTC P0340 will set if the PCM voltage on cylinder #4 signal wire is not pulled to ground (cam signal pulse) when:
Diagnostic Aids
Important: A cam pulse missing may not affect engine operation.
?€¢
An open or high resistance on the #1 plug wire or plug will result in DTC P0340 setting.


?€¢
Inspect the EIS towers and plug the wire connections for corrosion or other signs of poor retention at connections.


The electronic ignition (EI) module supplies a signal to the PCM whenever it determines that the #4 cylinder fired on its compression stroke. Because of opposite coil tower polarity, the simultaneous fir of #1 and #4 cylinders are of opposite polarity as well. Under most conditions, except decel, the waste spark cylinder fires before the compression cylinder in sequence. The EI module can determine this polarity sequence and voltage amplitude by using capacitive pickup plates located under the 1/4 coil. If the module senses a positive to negative sequence and high negative spike when #4 is on TDC, it pulls the PCM cam signal to ground signaling that #4 has just fired on compression. This signal along with the double pulse received from the CKP sensor, synchronizes spark and fuel timing.
Beside plugs , plug wires need to be replaced as well !

Aug 26, 2016 | Saturn Cars & Trucks

3 Answers

I have a 97 ford thunderbird with 4.6 v8 codes show cylinder 1&4 misfire I have changed plugs wires maf sensor and it ran fine for a luttle bit then started again


1 and 4 show to be on separate coils. Check to make sure the plug wires near the 1 and 4 wires are not touching as this can cause cross firing among cylinders.

Jul 06, 2015 | Ford Cars & Trucks

1 Answer

Y is my 97 chevy only fires on the number one cylender


if you have fire on the number one cylinder,it means that the ignition coil is working so your problem can come from spark plug wire or cap and rotor . unplug the wire from ignition coil to distributor and check for fire you are suppose to have fire because you saying having fire on cylinder one. from there change cap of distributor and rotor plus a set a spark plug wire.

Oct 07, 2014 | Chevrolet Silverado 1500 Cars & Trucks

2 Answers

Whats the order the spark wire goes?


I do not know if you have the 1.8L, 2.0L, or 2.8L; however I have included all three below.

For the 1.8L AND 2.0L:
Fire Order:
1-3-4-2
Cylinders:
.......(back)
1.....2......3......4
......(front)
Distributor:
....(back)
(+)..1
2.........3
......4..(+)-screw
...(front)

For the 2.8L:
Firing Order:
1-5-3-6-2-4
Cylinders:
........(back)
1.......3........5
....2........4........6 (bank offset)
........(front)
Ignition Coil Connections:
(back)
2...5
4...3
6...1

Oct 16, 2009 | 1997 Volkswagen Jetta

2 Answers

Code po304 #4 cylinder mis fire


ck if you have spark at the coil for that cylinder. check the plug wire closely. if it has spark at the coil, then replace all the spark plug wires.

Oct 12, 2009 | 2000 Cadillac DeVille

2 Answers

2001 pontiac cowl pack not fireing.


Here is a diagram of the firing order for you 3800 engine. Cylinders 1 and 4 are misfiring because the operate under the same "Coil Pack" and the coil pack has unfortunately gone bad. O'Reilly sells them for between $30-50 depending on the amount of warranty coverage you want. To replace, simply unscrew the screws that hold the coil pack in place. WAIT before unplugging the plug wires. Place the old coil pack and new coil pack next to each other, unplug one plug wire, then plug it to that same port on the new coil pack. then do the same for the other plug wire. Then screw your new coil pack in place, and start you car. should run fine!

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Sep 24, 2009 | 2001 Pontiac Bonneville

1 Answer

Coil pack diagram?


cylinder 1 is on passenger side, coils should be numbered, cylinder 4 is on drivers side

May 18, 2009 | 1997 Chevrolet Cavalier

2 Answers

1997 Saturn sl2 Code P0304-IC module cam reference


yes it is the ignition coils . po304 is a miss fire on #4 cylinder.wires and plugs should fix the problem unless ignition coil is not firing. there are 2 coils they run 1&4 2 &3 cylinders.

Mar 12, 2009 | 1997 Saturn SL

1 Answer

1998 Cavalier No Spark in cylinders 1 & 4


ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

Jan 13, 2009 | 1998 Chevrolet Cavalier

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