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No spark?

Tiny
RFISCHER63
  • MEMBER
  • 2000 TOYOTA COROLLA
  • 110,000 MILES
No spark to cyls. 3 & 4, replaced cps, there are no codes, switching coils still the same
Saturday, February 16th, 2013 AT 5:44 PM

41 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
The pcm controls the coil activity. The quad driver in the pcm may have failed.

Have the wiring checked from coils back to pdm before asuming the pcm is bad

Roy
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Saturday, February 16th, 2013 AT 5:48 PM
Tiny
RFISCHER63
  • MEMBER
  • 4 POSTS
The PCM was replaced, due to no reference signal to cam sensor, there is spark at cyls 1 & 3, when you change coils, it still has spark at 1 & 3, so I think coils are good, Chain timing marks are right, compression is 210lbs. On all cyls, when cranking it backfires.2
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Saturday, February 16th, 2013 AT 5:58 PM
Tiny
RFISCHER63
  • MEMBER
  • 4 POSTS
Checked wiring from cam sensor to PCM, had continuity
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Saturday, February 16th, 2013 AT 6:03 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Your question states cylinder # 3 & # 4 has no sparks but later you indicated # 1 and # 3 has sparks. I need to clarify this.

Which transmission do you have, 3 or 4 speed auto or manual?
Were the wirings checked for continuity between the PCM and ignition coils?
Were the ground wires for the connector checked for continuity to ground?
Is it confirmed that sparks is missing and not fuel injector problem?
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Sunday, February 17th, 2013 AT 4:16 AM
Tiny
RFISCHER63
  • MEMBER
  • 4 POSTS
Sorry about confusion, cyls 1 & 3 have spark, cyls 2 & 4 have no spark, switching coils makes no difference, so coils are good, Should I have 5v reference signal at Cam Pos. Sensor w/key on?I have no voltage @ cam sensor with key on. When I disconnect wiring to sensor and check w/ohmeter, I see varing resistance as engine cranks. Have not yet checked continuity between coils & ECM or coils & grnd, will do now. Have checked continuity between cam sensor & ECM, (has good continuity)
Car has a 4 spd auto, I have confirmed no spark @ 2 & 4 and good spark @ 1 & 2
I sent ECM to "EAS" in Jax, Fl, they said ECM was unrebuildable, do to no signal to crank & cam sensors and built a new one, it is doing the same thing. Also has a new Crank pos. Sensor
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Sunday, February 17th, 2013 AT 2:59 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Symptom indicates a fault between the ECM and ignition coil rather than anything else.
If it is a Crank sensor problem, you would be getting no sparks. How ever having only 3 sparks could be a fault with the picku points of the sensor rather then the sensor itself but this would throw trouble codes.

I have attached a schematic of the ignition coils.

Attach a noid light to terminal # 3 of the coil and ground the other end. Crank engine and note if it pulses.
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Monday, February 18th, 2013 AT 12:50 AM
Tiny
MROCK1985
  • MEMBER
  • 6 POSTS
  • 2000 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
I have no spark on two coils and spark on two coils. I moved the coils and ones that didn't spark now spark and the ones that did now don't. The two that do spark is 1 and 3 and the two that don't is 2 and 4.
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Saturday, December 26th, 2020 AT 2:18 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
This means all the coils are good. What you need to check would be the wiring circuit and the Engine Control Unit.
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Saturday, December 26th, 2020 AT 2:18 PM (Merged)
Tiny
MROCK1985
  • MEMBER
  • 6 POSTS
Checked them. Even just now replaced the cps
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
MROCK1985
  • MEMBER
  • 6 POSTS
Update. I unplugged the cam sensor and now all four plugs spark. Replace the cam sensor and problem repeated
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Did you check for trouble codes?
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
MROCK1985
  • MEMBER
  • 6 POSTS
Yes but because the battery went dead there were none
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Run the engine and recheck for trouble codes. They are the key to what could be the problem.
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
MROCK1985
  • MEMBER
  • 6 POSTS
Ok so the two coils that spark are weakish and orange. I really need to get this car running again soon. I bought a scan tool and so far it is of no help.
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
MROCK1985
  • MEMBER
  • 6 POSTS
I just found out that the car over heated and the belt broke. Replace the belt let it cool and that's when the problem started. It cranks fine. I do get an rpm reading but it does not start. It has 4 cop 2 which won't spark and the other 2 do spark. When I unplugged the cam sensor all 4 sparked weak and slow. Replace the cam sensor with no improvement.
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
If you have not resolved the problem, check the compression. The overheating could have damaged the head gasket causing the misfiring and non starting due to compression loss.
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
PACIFICISLANDER
  • MEMBER
  • 240 POSTS
  • 1996 TOYOTA COROLLA
  • 1.6L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Test pick-up coil, new coil, capacitor, change igniter and crank sensor. Problem still exist.
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,179 POSTS
Hi,

Have you checked all grounds related to the ignition system?

I have attached two pics. Pic 1 shows ground areas of concern. Pic 2 is a flow chart that is specific to ignition issues. Take a look through it and let me know if there is anything you may have missed.

Let me know.
Joe
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
PACIFICISLANDER
  • MEMBER
  • 240 POSTS
Here's the scoop: I remove the distributor cap and test the center of the coil which is the secondary winding's and have a spark that looks weak. What now do I do next?
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)
Tiny
PACIFICISLANDER
  • MEMBER
  • 240 POSTS
Should I replace the coil/cap/wires/plugs? Also weak at the plug wires ends. I think that will do it. Any other ideas?
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Saturday, December 26th, 2020 AT 2:19 PM (Merged)

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