Bad bad bad BAD misfire!

[ccapehartusarmyINF.(ret)]

yeah im totally the same way before i bought the tahoe i had i always bought new vehicles the last new vehicle i bought was when i came back from iraq i ordered a brand new ford ranger FX4 with every option possible but im like you i likke to tinker and there aint much to tinker with on a new vehicle so i finally sold it it was paid off and bought the 02 tahoe and i had plenty to do
then i recently got this 01 suburban and theres always something that needs tinkeren
my father tends to rags on my sometimes "when are you gonna be all finished" i have to explain to him that its more like a hobby to me its something i enjoydoing
its not a chore

my goal though is what im calling it the apacalypse suburban fully capable of handling just about any obstacle one mite encounter while roaming the wasteland

 

[#1taho]

yeah im totally the same way before i bought the tahoe i had i always bought new vehicles the last new vehicle i bought was when i came back from iraq i ordered a brand new ford ranger FX4 with every option possible but im like you i likke to tinker and there aint much to tinker with on a new vehicle so i finally sold it it was paid off and bought the 02 tahoe and i had plenty to do
then i recently got this 01 suburban and theres always something that needs tinkeren
my father tends to rags on my sometimes "when are you gonna be all finished" i have to explain to him that its more like a hobby to me its something i enjoydoing
its not a chore

I am with you 100%. My wife thinks my truck is a piece of crap cause I am allways buy something for it and fixing it. She don't understand. But I have less money into my truck than her last three vehicles ! Lol. Oh well. Keep plugging away.

 

[ccapehartusarmyINF.(ret)]

ROLFMAO dude my perents and my brother think the same way they think my vehicles a piece of crap to there snobs they still buy new they dont realize that
i didnt stop financing and buying new vehicles because i couldnt afford to i did it because i got tired of making ford motor credit richer and buy a new vehicle is a bad investment the depreciation right off the lot is absurd
i preferr to use those car payments on maintence or repairs if need be and the upside there is a car payment is do every month
a used vehicle doesnt need a carpayments worth of repairs or maintenence every month

 

[oldsman003]

Still running like hammered dog doo before removing the harness I removed all loom and found perfect wires. Yet another tech hooked it up to his snap on scanner and had no advice. It's going to sound weird but what are symptoms of a faulty temp sensor or sending unit? Within a minute of what the truck now calls "running" the temp gauge was pegged on hot. I'm not familiar with these engines or systems but I know how some little things can cause huge problems. I haven't changed knok sensors as I read more in depth and decided that isn't likely the issue.

 

[ccapehartusarmyINF.(ret)]

so the temp guage almost immediatly shoots up to 260 dagrees ? have you confirmed that is a false reading?

 

[oldsman003]

Yes after less than a minute of running. This whole truck is screwing with my better knowledge as a mechanic.

 

[oldsman003]

I'm almost positive i5 has nothing to do with the immediate runability of the truck but you never know on these new cars so I figured it is worth mentioning. Could be nothing though. I was going to pull the front of the engine apart and check timing but the damn truck starts up so nice even from sitting not running for a month man it doesn't miss a lick firing. But then misses so bad.
From what the scanner shows it misfires the worst on 2,4,6 and does misfire on all cylinders but you just can't tell while it's running. I'm so frustrated

 

[ccapehartusarmyINF.(ret)]

okay if weve already gone over this sorry but has a compression test been done yes ?

 

[oldsman003]

Compression is 125 psi + I just got done installing a new timing set. Was nothing wrong with old one. But since I use and will user this truck to tow with I already had it apart to check timing so I went ahead and swapped it out, dinky little chain I will tell you. Spliced a new coil harness ground in with no luck. What else could cause this problem

 

[ccapehartusarmyINF.(ret)]

on thing that you mite wanna check is the spark plug gap because mine was missing here and there so i changed the plugs and the old ones had like .80 gaps and once i installed new plugs with the correct gap of .40 it runs alot better