jaredsmith.tx

So I recently had my radiator blow up on me, I replaced it, t-stat, and the water pump. After all this it seemed to be running ok, but after a few days it started running (mostly at idle) rough. Got the scan test done and its a cylinder 2 misfire. I checked the spark plug wire and I am getting spark through it, checked it with the spark plug hooked in and it is sparking as well and the plug looks in pretty good shape. What is the next step/steps to take in trying to self diagnose this problem. I know there needs to be the right compression and the injector needs to be checked. If yall can help me out with what to check, and how to go about checking these things that would be great.

I've posted a lot lately and everyone has been very helpful. Thanks for that and thanks in advance for any help anyone can give me.

98cherokeeguy

Faulty spark plug would be my guess try replacing that one spark plug and see if it stops

jaredsmith.tx

If i visually saw the spark plug sparkingg wouldn't that mean its ok? Or can it still be sparking but not up to par when the engine is running

98cherokeeguy

Well not really it can just defaulted still I forget what it's called when the spark plugs do it but just give it try it'll take lime 15 minute to go and buy the plug and put it in and like mabey three dollar for the plug I've had this happen to my lawn mover it would just back fire or miss and I replace the plug and it worked great

jaredsmith.tx

Im gonna just change all the plugs today, about time anyways. And i think autozone rents compression testers and i might check that too. Yall will here mor from me, thanks guys!

Cybershot

You can check the injector signal in this way:

- Take an volt meter vor measuring up to 20 volt
- connect the black end (negative) of the meter at the frame or the batery minus
- turn the key to start, but don't start the engine (last step below) lights in the dash shall come on
- check both wires at the injectors
- 1 shall have 12 -13 V and the other 0

the one with 0 is the one which later tells the injector when to inject and it only give any volt when the engine is runing. The other is always on 12-13V as power supply.

If this wire gives no impuls to the injectors, you can have fuel pressure as much as you want, because the "valve" is closed!