stttttttttuttering.. HELP!
#1
stttttttttuttering.. HELP!
I thought the fuel filter might have been the problem, so I replaced it, but the truck still stutters. The stuttering mostly occurs in the lower rpms. Noticeable during acceleration, instead of a low steady tone, it stutters. Tonight it seemed worse, shaking the truck a tad. No check engine light yet.
The truck has 65k on it.
Could it be:
The spark plugs? Stock originals..
Fuel pump? Stock original..
PCV Valve?(not sure if that is the right acronym as I am brain dead) stock original..
Dirty MAF? (I do have a K&N)
Bad Oil? (should still have another 2k of life)
Oxygen sensor? Stock original..
Bad Gas? (filled up 2 days ago)
Should I remove the tuner and just take it to a mechanic?
The truck has 65k on it.
Could it be:
The spark plugs? Stock originals..
Fuel pump? Stock original..
PCV Valve?(not sure if that is the right acronym as I am brain dead) stock original..
Dirty MAF? (I do have a K&N)
Bad Oil? (should still have another 2k of life)
Oxygen sensor? Stock original..
Bad Gas? (filled up 2 days ago)
Should I remove the tuner and just take it to a mechanic?
#2
#6
Replaced wires and it still does it..
at least I am getting some basic maintenance out of the way..
Next on the hit list:
Ignition Coil
Fuel Injectors
but those will have to wait till friday.. hopefully I get paid on the 4th..
So far $129 spent replacing/cleaning parts that weren't the problem..
1. Replaced Fuel Filter
2. Replaced Spark Plugs
3. Replaced Wires
4. Cleaned MAF
5. Cleaned K&N
at least I am getting some basic maintenance out of the way..
Next on the hit list:
Ignition Coil
Fuel Injectors
but those will have to wait till friday.. hopefully I get paid on the 4th..
So far $129 spent replacing/cleaning parts that weren't the problem..
1. Replaced Fuel Filter
2. Replaced Spark Plugs
3. Replaced Wires
4. Cleaned MAF
5. Cleaned K&N
Last edited by FX2.3; 07-02-2008 at 09:10 PM.
#8
The only one I have found so far is Built to Last Duralast! $55 aint too bad..
I will change it either sunday or monday.. and if that dont work then Im gonna give up and pay for my local shop to fix it..
#13
#14
#15
idle air control shouldn't be anywhere near the maf, it should be mounted on the throttlebody with one senser plug. it has two phillips screws most likely holding it in place and will be mounted on the firewall side of the throttlebody. a pita to get to due to egr, but thats not knowing what year truck you have. the only sensor near the maf, i thought was the map sensor mounted on the firewall. am i wrong?
#18
#19
on the old 2.5L, Yes.
on the 2.3L Duratec, No. Just one coil.
Easy, disconnect battery, remove plugs one at a time and transfer them to the new coil matching the numbers, remove other clip thing, unbolt old, rebolt new, reinsert clip thing, the 4 bolts used an allen wrench I think.. reconnect the battery and crank er up!
on the 2.3L Duratec, No. Just one coil.
Easy, disconnect battery, remove plugs one at a time and transfer them to the new coil matching the numbers, remove other clip thing, unbolt old, rebolt new, reinsert clip thing, the 4 bolts used an allen wrench I think.. reconnect the battery and crank er up!
#20
#21
#22
Alright, I tore into it last night. Replaced the coils and the IAC valve. While it didn't completley fix the misfiring, it seemed to get better once it warmed up. The IAC was done due to it staying at high rpm's and not coming down right away when I'd shift.
However, the coils made a HUGE power difference. And I just put the el cheapo "built to last duralast" coils in, not the high performance ones. The butt dyno said like 20hp better!!
We're going to see how it drives this weekend, and if it's still missing quite a bit then it's going to a mechanic to get the ignition and valve timing checked out.
Thanks for all the help!!!
However, the coils made a HUGE power difference. And I just put the el cheapo "built to last duralast" coils in, not the high performance ones. The butt dyno said like 20hp better!!
We're going to see how it drives this weekend, and if it's still missing quite a bit then it's going to a mechanic to get the ignition and valve timing checked out.
Thanks for all the help!!!
#24
I've done plugs & wires, and now the coils, might look into fuel filter I guess. I duno, I might "accidentally" drive it off a cliff... at least then I'd be done wrenching on the damn thing!!! LOL!!
It does it at all rpm's, though its tougher to hear at higher rpms but it still studers and misses, and isn't as noticeable under heavy acceleration, so I'm thinking it's probably not the fuel filter.
It does it at all rpm's, though its tougher to hear at higher rpms but it still studers and misses, and isn't as noticeable under heavy acceleration, so I'm thinking it's probably not the fuel filter.