Honda Civic Misfire
#1
Honda-Tech Member
Thread Starter
Join Date: Feb 2012
Location: Tooele, UT
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Honda Civic Misfire
I have a 98 civic ex that reads a cylinder 1 misfire, a cylinder 3 misfire, and a random misfire. I have replaced the spark plugs, wires, distributor, cleaned injectors. cleared all codes and it still keeps reading the same thing any ideas?
#4
Old Fart
Join Date: May 2004
Location: kelowna, bc, canada
Posts: 26,173
Likes: 0
Received 14 Likes
on
14 Posts
Re: Honda Civic Misfire
Plugged injector, or injector is not "firing", check for power at the injector, [lead that is the same color at all four injectors] should be hot, [12V+] with ign. switch in run and start, check for a ground pulse, [from ECU/ECM] at the injector, [lead that is a differant color at each injector, you will need a noid light, or an LED type test light will work.
Switch the injectors, [3 and 4] and see if the problem fallows the injector. 94
Switch the injectors, [3 and 4] and see if the problem fallows the injector. 94
#5
Honda-Tech Member
Thread Starter
Join Date: Feb 2012
Location: Tooele, UT
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Re: Honda Civic Misfire
ive switched injectors around and its always cylinder 3 ill go out and test the leads in a bit and let you know
also would just a normal test light work
also would just a normal test light work
#6
Old Fart
Join Date: May 2004
Location: kelowna, bc, canada
Posts: 26,173
Likes: 0
Received 14 Likes
on
14 Posts
Re: Honda Civic Misfire
Do not use a normal test light to test for ground pulse, you can use it to test for power.
The ground pulse from the ECU/ECM is low current, a normal test light can damage the injector output of the ECU/ECM.
If you have a 12V LED from an alarm or something, you can use it, even a small normal bulb like a 194 or 168 can be used to test pulse...
Straighten out the small wires, and stick them into the injector plug, unlike an LED it makes no diff. which wire goes where. 94
The ground pulse from the ECU/ECM is low current, a normal test light can damage the injector output of the ECU/ECM.
If you have a 12V LED from an alarm or something, you can use it, even a small normal bulb like a 194 or 168 can be used to test pulse...
Straighten out the small wires, and stick them into the injector plug, unlike an LED it makes no diff. which wire goes where. 94
#7
Honda-Tech Member
Thread Starter
Join Date: Feb 2012
Location: Tooele, UT
Posts: 24
Likes: 0
Received 0 Likes
on
0 Posts
Re: Honda Civic Misfire
i used a led test light and it pulsed on the different color lead and the same color lead had power both running on with key turned on
Thread
Thread Starter
Forum
Replies
Last Post
Brycen
Honda Civic / Del Sol (1992 - 2000)
2
03-18-2012 07:13 AM
davidbrookstone
Honda Accord (1990 - 2002)
6
11-11-2011 11:38 AM
OrangeBoost
Forced Induction
4
05-30-2006 10:22 AM