im new i don't know what to do

[brcknrdg]

My 99 with 160,000 finally has a problem(other than heater core 2x) Idles slightly rough not to bad, in park engine sounds runs good. when driving sounds very sputtery for lack of a better term. loss of power as well.

new spark plugs, check
new cables, check
new o2 sensors, check 3x
new air filter, check
engine block test, blue
obdII no codes
obdII code relaying check, by disconnecting air flow sensor, Check

I am leaning towards exhaust issues, I do run K&N with flowmaster exhaust nearing 8 years of age, original cat,

only replacements have been maintenance other than heater core
shocks, brakes, tires, alternator, battery, oil, lubes, coolant.


muffler shop?
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99 ford ranger, 3.0 automatic 4x4 no real upgrades makes it everywhere like it is

 

[Gary101386]

fuel filter...?

 

[eclipse2001gt]

Would change cat since it has been on the truck for 11 years and it is about time to change it to a new one and would check the rest of the exhaust just to make sure it is good to go longer with out replacing it. People don't always look at the cat being a problem until it is too late and they have to replace more than just a cat on there vehicle and most of the time it happens when they don't have the money to get anything fix on the vehicle and they are stuck with a vehicle they can't drive.

 

[brcknrdg]

misfire on #2 CYLINDER, no spark = bad coil. replaced with motorcraft coil problem solved. I am still going to clean the iac and other sensors while i am at this and probably do a seafoam for hits and giggles.

talked to a mechanic friend of mine about why it was not throwing misfire codes, response was; ford obd takes a bit of driving time before recording any types of codes. ?? fortunately I parked it and drove the e350 super duty until i had time to deal with it. my guess would be that pushing that much raw fuel through the cat would most likely foul it. Wonder what unburnt seafoam would do?

Thank you for the replies and help. I will update any performance increases with seafoam and iac cleaning.

 

[brcknrdg]

cleaned engine bay today along with cleaning and coating K&N I have had sitting out for the last year, did 3 step seafoam treatment, cleaned IAC, and MAF.

Needless to say, but I will- along with the new plugs, new cables, new coil, and all three new o2 sensors the ranger runs like new. It is hard to believe it has 168,000 miles on it.

Im stoked it is back up and running!
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99 ford ranger, 3.0 automatic 4x4 no real upgrades makes it everywhere like it is

going to give it a few miles and swap out the bosch plugs