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#6828613 - 01/13/13 01:20 PM Si is running very rough
Gw83422 Offline
Newbie


Registered: 01/13/13
Posts: 2
I have a 2000 si and it is running very rough. I replaced the plugs, wires, and cap with no luck. I also swapped out injectors with no change. I can start the car and remove each wire and only one cylinder does not make the engine struggle. I need help badly!!!!
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#6869853 - 01/31/13 08:45 PM Re: Si is running very rough [Re: Gw83422]
4doorEG Moderator Offline
Post Master Sr


Registered: 11/23/01
Posts: 6098
Loc: Overland Park, KS
You should most likely do a compression test. It's very common for them to burn valves/chip valves and lose compression. If that's the case then a compression test will help with the diagnosis.

Also, is the car relatively stock? I hate seeing posts like this and then 20 posts later "oh yea, it's a built engine with a turbo setup"
_________________________
94 Civic Hatch
9.85 @ 155 mph


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#6882862 - 02/07/13 08:52 AM Re: Si is running very rough [Re: 4doorEG]
Gw83422 Offline
Newbie


Registered: 01/13/13
Posts: 2
Yes the motor is basically a stock b16a. When I pulled the plug and started the motor it fealt like that cylinder had good compression, but I will hook up my compression tester and see what I get.
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#6887159 - 02/08/13 08:44 PM Re: Si is running very rough [Re: Gw83422]
4doorEG Moderator Offline
Post Master Sr


Registered: 11/23/01
Posts: 6098
Loc: Overland Park, KS
If you spent time to pull the plug why didn't you just compression test it them?

With asking for help on the internet, you want to give as much useful information as you can. Otherwise you will not get good advice.
_________________________
94 Civic Hatch
9.85 @ 155 mph


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#7351059 - 10/22/13 11:23 PM Re: Si is running very rough [Re: Gw83422]
1987yota Offline
Jr Poster


Registered: 01/27/04
Posts: 193
Loc: Seattle
Make sure that when you're doing a compression test that you pull all spark plugs out, not just one of them. Test each cylinder while all the plugs are out of the head. That will give you the most accurate reading.

In addition, poor coolant circulation around the throttle body will lead to poor engine performance/rough idle.

There are many things that can cause a runability issue. I would start ruling out things before replacing parts. As you know, that can be an expensive diagnosis tactic.

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