I recently had the alternator rebuilt and since then my truck has been cutting in and out as well as making this horrible popping sound and over heating. I have replaced the plugs and plug wires, air filter and thermostat. When it over heats I will hit the breaks to pull over and it will go back to normal before I even get stopped.
This issue can't really be diagnosed without looking at it. You really need to get this into a shop for an inspection, and based on the horrible popping noise you may want to consider having it towed there. If you had a shop do your alternator you should call them first but its hard to imagine how installing an alternator incorrectly could cause all of those problems.
Check for a bad ground wire...a defective alternator,,of a fried injector driver on the PCM due to a spike from the alternator cooking the PCM..causing the misfire when it looses the injector driver to #2 cylinder
Hello Sarah, I'm sorry to hear that your having issues with your truck. It's never fun having to do repair work.
So I know this sounds redundant, but check to make sure each spark plug is seate properly. I would also suggest checking your injectors to see if the injector for cylinder #2 is clogged. If it was running fine before you changed your alternator, and now it is not, then I would check the electrical connections to and from your alternator.
It's hard for me to really say much, as I do not know what engine you have in your 97' f-150.
I'm not sure whether you can reply on here or not, so if you need further assistance, please email me directly at [email protected]
i would be glad to help you figure out your problem.
regards,
DragonCore
I can't guarantee this, but it sounds as if you still have a problem with the alternator. I say this because when the alt. malfunctions on these vehicles, it will affect all of the gauges readings on your dash. Thus your gauges show bad readings one moment then when you slow down they can return to normal. Like I said, no guarantee, but I would take the alt. off the vehicle and have it tested at a parts store.
The overheating sounds like some wires are touching that shouldn't be . the misfire is most likely the number two coil. Good Luck.
Have a compression test done. You'll likely find a valve not seating.
If the engine is not really over heating as it sounds like it is not. The first thing to check is the ground wire that goes from the engine to the car body, if this wire is lose are broke the gauges will give a false reading. Try this first. As to the popping sound a little more info would help. Popping sound as going over bumps are when you are turning ?
Replace the coil pack
SOURCE: engine code p0307 cylinder #7 misfire
It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.
SOURCE: ford e 150 4.2 Misfire cylinder 6
do a compression test, you may have a bend valve , I'm assuming its not getting overheating so I don't think its the head gasket..a compression test can give you the answer..hope this was very helpful...thanks
SOURCE: Getting a code of misfire on cylinder 2, Bank 1 and lean code
Higher compression usually only happens when extra oil is introduced in to the cylinder.Your rings seem good due to the good compression .If there is a worn valve guide in that cylinder this would allow oil to seep into the cylinder .Also allowing for extra rocker arm movement which could be your chirping noise and cause a rough idle.The lean code sounds like something different like the is still a vacuum leak.It sounds like you know cars well ! I hope this helps
SOURCE: 2002 Ford Taurus V6 DOHC engine is running rough.
I would suggest replacing the coil pack. Thanks and good luck with your repair.
SOURCE: code p0302
Look at the wire and plug to cylinder 2, for cracks or damage, if nothing is found run a compression test need 100psi min, and then check the injector, you need to meshure resistance with a multimeter, and compare to other injectors something like 12 to 15 ohms would be good i think.
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