2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

99 3.0 misfire ??

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Old May 16, 2011
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Icon5 99 3.0 misfire ??

A couple weeks ago as I was driving along my truck began to shake and lost power. No check engine light came on. I had ran some E85 the week before so I thought maybe that caused the problem. I changed the spark plugs and wires,fuel filter and also added some Lucas injector cleaner...no change. The next day the check engine light came on, so I went to have the parts store to have them check the code. They said it had a misfire on cylinder 6, and lean on bank 2. Can anyone tell me what would cause something like this to happen?? This truck didn't have much power to start with...now it has none. Any help or advice would be greatly appreciated.
 

Last edited by jscantland; May 16, 2011 at 02:43 PM.
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Old May 16, 2011
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Just went to town and now the battery light is flashing. Now what is going on?? I was kinda thinking maybe a dirty or defective injector, but now I'm even more confused. SOMEONE PLEASE HELP ME!!!
 
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Old May 17, 2011
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Try cleaning / checking all the ground connections. Someone posted a while back that a bad ground to the engine was causing a sporadic misfire .
The battery light flashing could also be a bad ground , the alternator failing , or the serpentine belt tensioner may be frozen and letting the belt slip.

eta
These trucks don't seem to like to run well on E85.
 
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Old May 17, 2011
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My truck runs great on E85, much better on corn than gasoline.

Check your injectors jscantland, if you have a VOM, disconnect the injector plug and check the resistance. Should be about 14-16ohms.
 
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Old May 19, 2011
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Icon14 Figured it out

Couldn't take it anymore so I decided to buy the manual and tear into it. I tested the #6 injector and guess what...no resistance, all the others tested good. Replaced the bad injector and also the # 6 spark plug because it was already wasted. Now she runs like a champ, well, as good as a stock 3.slow can be expected to. The battery light isn't flickering anymore either. I just wanted to say thanks to you guys for your input.

Justin
 

Last edited by jscantland; May 19, 2011 at 07:09 PM.
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Old Jul 11, 2011
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how did you test the injector?
 
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Old Jul 11, 2011
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Hook a lead to each prong to test resistance.
 
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Old Jul 11, 2011
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is there a good how to that you know of that i can read to how to get and replace injectors?
 
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Old Jul 12, 2011
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I bought the Haynes Manual. It tells you step by step how to do almost everything. If you have a little general mechanical knowledge, you can figure it out. Against my better judgement, I just went to Advance Auto Parts to get the injector. I'm thinking it was $55-60. I did see some cheaper on E-bay, but didn't want to wait on shipping and so on.
 
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Old Jul 12, 2011
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yea thats the only reason i buy from advance. i look on other sites for the right part then go to advance, price match, and pick it up in store. shipping is annoying ha. but when you replace injectors, do you normally just do it one at a time, is it a regular maintenance practice? im saying should i replace mine? im sure they never have and my truck is reaching 200k.
 
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Old Jul 12, 2011
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I just replaced one, and I am at just under 150k. I can't tell you if that is the best way to go about it, but that fixed my problem. It would be real easy to change them all while you have the upper intake off. If I'd have had the extra $$$ I would have probably replaced them all.
 
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Old Jul 12, 2011
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basicaly, there right under the upper intake tho? sounds easy enough. thanks!!
 
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Old Jul 12, 2011
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You can get Motorcraft injectors through Rockauto for about $50.
 
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Old Jul 12, 2011
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sweet thank you very much...got myself a good list of projects
 
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Old Jul 12, 2011
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how many lbs/hour do i want??
 
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Old Jul 13, 2011
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Originally Posted by Kris03
basicaly, there right under the upper intake tho? sounds easy enough. thanks!!
Yes, once you remove upper intake you'll be able to access the fuel rails and injectors.
 
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Old Jul 13, 2011
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sweet deal. thank you! and as for the lbs/hour? do you know what stock is?
 
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