2001 Honda Prelude No spark

KCRAWFORD1963

MEMBER
2001 HONDA PRELUDE
4 CYL
2WD
AUTOMATIC
6,659 MILES

I have no spark at spark plug 1, pulled spark plug out grounded turned engine over no spark. Tested wires going to coil as manual stated battery volts at blkyellow. Tested resistance at coil test like manual said a to sec winding tested 18.9 ohms ok. A-c tested 0 ohms manual said.64 to.78 went to Autozone and tested new coil same results. Tested ICM unit tested ok. Tested wires 12v at black and yellow. Tested countinuity as far as I could in engine compartment. Could follow back all the way to ecm couldn't find plug as discribed in manual. I have new plug wires. Resistance good. I have 12 volts coming out the end of the coil. Checked all fuses all good. Car was stored for 5 years and only driven for 1 before storage. Need to know next step to track problem down. I am willing to donate $10.00 to start. I am not sure how this all works but if you stick with me until I solve the problem I will donate another $20.00

Saturday, May 2nd, 2009 AT 8:20 PM

3 Replies

KHLOW2008

MECHANIC
41,814 POSTS

Hi kcrawford1963,

Thank you for the donation.

You mentioned no sparks at # 1. What about the other cylinders?

You mean the secondary coil has 18.9 k ohms?

12 v at Black/Yellow wire at ignition switch ON. Did you test the voltage while cranking engine? A bad ignition switch might cut the power supply when cranking the engine.

Does the Check Engine Light comes on and goes off after 2 seconds when key is turned to ON?

A bad ECM ground would cause no sparks. Check the connection on right side of engine, on thermostat housing.

Check for wiring damage due to rodents etc.

We shall start with this and if you have any other questions. Reply to this post and I will get back to you.

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Sunday, May 3rd, 2009 AT 1:05 AM

KCRAWFORD1963

MEMBER
2 POSTS

No spark at any of the 4 cylinders Yes, I ment 18.9 k ohms. When cranking the voltage at black/yellow 10.8volts befor coil. Check engine light blinks and stays on ofter 2 seconds. Ground is good checked continuity in several places. No rodent damage that I can see. Sorry for the late reply trouble getting on to the web site it would not accept my user name? Thanks!

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Sunday, May 3rd, 2009 AT 10:31 AM

KHLOW2008

MECHANIC
41,814 POSTS

The site is sometimes difficult to access but it should not be rejecting your user name. If you continue to have this problem, then you should email to the webmaster to have them check it out.

Ignition coil tests results are correct.
Let us recheck the ICM test.

Ignition Control Module (ICM) Input Test (Prelude)
1. Turn ignition off. Remove distributor cap, rotor, leak cover and cap seal. Disconnect wires from ICM. See Fig. 17 . Turn ignition on. Check for voltage between body ground and Black/Yellow wire. If battery voltage exists, go to next step. If battery voltage does not exist, check for open in Black/Yellow wire between ignition switch and ICM.

2. Ensure ignition is on. Check for voltage between body ground and Green wire. See Fig. 17 . If battery voltage exists, go to next step. If battery voltage does not exist, check ignition coil operation. Replace ignition coil as necessary. If ignition coil is okay, check for open in Green wire between ICM and ignition coil.

3. Turn ignition switch off. Disconnect PCM connector "A" (32-pin connector). Check for continuity of Yellow/Green wire between PCM connector "A" (32-pin connector) terminal No. 20 and ICM. If continuity exists, go to next step. If continuity does not exist, repair open in Yellow/Green wire.

4. Check for continuity between body ground and Yellow/Green wire. If continuity does not exist, go to next step. If continuity exists, check for short to ground in Yellow/Green wire.

5. Reconnect PCM connector "A" (32-pin connector). Disconnect instrument cluster 16-pin connector. Check continuity of Blue wire between ICM and tachometer. If continuity exists, go to next step. If continuity does not exist, repair open in Blue wire between ICM and tachometer.

6. Check for continuity between body ground and Blue wire. If continuity exists, check for short to ground in Blue wire. If continuity does not exist, wiring is okay at this time. Replace ICM. Reconnect instrument cluster 16-pin connector.