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I have a misfire issue with my car it runs but poorly i have pics of the spark plugs after running the vehicle for a few mins. I’m trying to figure out if it an ignition problem or a mechanical problem. The first 2 plugs look fine but the other 2 that look dark 1 and 4 cylinder are he plugs that look fine but 2 and 3 cylinders look to be the problem any suggestions that I could try thanks.
Also the plug that looks bent I dropped it by accident I gap it back
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I did discover that 2 of the fuel injector connections was crossed cause I was looking at a picture I took a few years ago of the engine then I was looking at it now thats how I stumbled apon it. Would this affect how its running.
[quote=”Mrfixit24″ post=112501]I did discover that 2 of the fuel injector connections was crossed cause I was looking at a picture I took a few years ago of the engine then I was looking at it now thats how I stumbled apon it. Would this affect how its running.[/quote]
The old saying is the proof is in the pudding. I suggest you find out.
I gotta go back a few steps to get the car started. I got my alternator tested today I thought it was bad but it was good. Now I’m leaning on the alternator relay cause nothing doesn’t work until the car is actually on. When I take off the relay from the fuse box and put it near my ear and shake it I here something rattling around now I gotta figure that out now.
Too much shop think here. So, in your mind, limit yourself to a small box of basic tools. Now, tell the owner how to fix his or her vehicle.
If someone wants to work on their car, they will have to purchase tools. Period. Otherwise your guessing with diagnosis. You can do things and diagnose things without tools, but only to an extent. Not shop think. “Shop think” IS the diagnosing process.
Check Vacuum leaks with a can of carb. cleaner.
Listen for Fuel Injector solenoid operation with a screwdriver.
Test light or DVOM for check injector pulse.
$20 code reader to wipe DTC History to check for misfire travel when moving coils.
That’s a pretty cheap way to do it.
Besides the fact that most autoparts stores will let you rent specialty tools for free.
Anyway, check the relay. Eric has a great video on how to do that.
The EGR being clogged like that likely won’t effect much unless the engine is under load like when going up a hill or passing someone. It’s still a good idea to clean it though.
Based on those plugs and also the buildup in the EGR, I’d be checking engine mechanical just to be sure your engine is in good shape. A compression test as suggested is a good place to start.
That said, if you have fuel injector connectors that aren’t in the correct location, this can also come into play. Be sure those are hooked up correctly.
I’ve written extensively on issues like this. This article I wrote also contains videos, one of them on compression testing, that may also help you.
http://www.ericthecarguy.com/faq/solving-automotive-performance-issues
Good luck and keep us posted on your progress.
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