Big Oil and Big fuel not so big..

bad12jr · Jul 25, 2013

It honestly sounds like air intrusion. Maybe a cracked pickup tube?

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Tom S · Jul 25, 2013

1 and 8 sound right to me for the cps issue. 7 and 8 do not.

Rideracelivemx7 · Jul 26, 2013

What do you guys think about for a back pressure sensor or air temp sensor? Ait is removed and bps is reading max

littleredstroker · Jul 26, 2013

Rideracelivemx7 said:
What do you guys think about for a back pressure sensor or air temp sensor? Ait is removed and bps is reading max

The scangauge should have a parameter to read back pressure , is that what you are looking for ?

sent while staring at a windowed block

boggerr · Jul 26, 2013

Rideracelivemx7 said:
What do you guys think about for a back pressure sensor or air temp sensor? Ait is removed and bps is reading max

Not sure about the AIT sensor but I think if the BP is reading high it will defuel

lincolnlocker · Jul 26, 2013

Rideracelivemx7 said:
im running motorcraft filters, and theres around 500 ish miles on this oil change. Fuel filters are a Pre - 100 micron or something and post is a 10 I think. CARQUEST brand

is that carquest oil too?

Rideracelivemx7 said:
In matts test tune ive been using(8th position ive mentioned) AND with out the chip it runs just fine until normal operating temp. there's very slight bucks or hiccups inbetween but wouldn't really notice.

when you flip to a different tune and do a cct, do the same cylinders fault? or bounce around?

live life full throttle

Rideracelivemx7 · Jul 26, 2013

I have the scan gauge setting for BP and it reads 53 tapped out so that's another thing I can try. its been pouring the last 2 days so I haven't been able to swap parts but ill be doing this tomorrow some time.

I use Delo 400 oil from wally world because its dirt cheap LOL anywhere else its 18$ a gallon, I swapped from rotella T6 synthetic and the truck just like its better.

You know...I ran 2 contribution tests, one with the scan gauge and 1 with the snap on scanner...I didn't even think of running another on a different tune. uhg, I can run one when I get home after work and when its up to temp and ill report back.

Rideracelivemx7 · Jul 30, 2013

Ok so a little update

getting real sick of the way its running. swapped IDM, map, icp, Exhaust back pressure. nothing.

Unplugged every sensor under the hood, started awfully weird but to be expected. still had my skip.

If everything was unplugged you'd think the factory parameters would change atleast something, but not the case. Im leaning towards my injectors now, thinking ill pull them tonight and send them to full force for a look over. Everything I scan points towards a healthy truck. No codes on the truck now that I replaced the exhaust sensor..

02BigD · Jul 30, 2013

Have you pulled the wires off one at a time and seen if there is a change in the way the truck is idling? Maybe it was already mentioned, but do you have a good post fuel pump filter?

Strokersace · Jul 30, 2013

02BigD said:
Have you pulled the wires off one at a time and seen if there is a change in the way the truck is idling? Maybe it was already mentioned, but do you have a good post fuel pump filter?

^^^ WHS. Also have you pulled the valve covers and started it up, then inspect if oil is squirting out of each injector? Also while idling unplug each injector individually to see if anything changes.

lincolnlocker · Jul 30, 2013

Strokersace said:
^^^ WHS. Also have you pulled the valve covers and started it up, then inspect if oil is squirting out of each injector? Also while idling unplug each injector individually to see if anything changes.

i mentioned that a while back.

live life full throttle

Strokersace · Jul 30, 2013

lincolnlocker said:
i mentioned that a while back.

live life full throttle

LOL! I know but most every piece of advice has been mentioned several times in this thread. So I figured this needed mentioned again so that he may actually try it!

Rideracelivemx7 · Jul 30, 2013

well ill making double sure that there is oil squirting out when I go to pull this thing apart when I get home after work. Ive been driving the truck like this since early may so I know they are all firing. just not correctly on the correct tunes for the truck. At witts end with this thing, its not even fun to drive it anymore unless your smashing the throttle and im not a fan of wailing on my poor truck much.

Rideracelivemx7 · Jul 31, 2013

oil was indeed coming out of each injector last night, I pull the injectors and they are off back to full force to see if they can find anything. I ran 3 more contribution tests, consistenly pulled up 1, 7 and 8 but each tune was a different cylinder, matts was 7 and 8, PHP was 1 and 8 and stock was just 1 I think it was. the last 2 seemed to sound a little different and didn't smoke as much. the middle of the test the cylinders would roll smoke pretty good

Strokersace · Jul 31, 2013

Rideracelivemx7 said:
oil was indeed coming out of each injector last night, I pull the injectors and they are off back to full force to see if they can find anything. I ran 3 more contribution tests, consistenly pulled up 1, 7 and 8 but each tune was a different cylinder, matts was 7 and 8, PHP was 1 and 8 and stock was just 1 I think it was. the last 2 seemed to sound a little different and didn't smoke as much. the middle of the test the cylinders would roll smoke pretty good

Did you unplug the wire connector from each injector 1 at a time to see if anything changed??? Or did you just pull the injectors?

Rideracelivemx7 · Jul 31, 2013

no I didn't feel the need to, it idols just great. sometimes it gets a little lumpy but it will eventually smooth out. its just revving or acceling it will get the skip/miss/buck is when you notice it. I sure know what a down cylinder sounds like/ idoling/reving/driving and its sure not the case here.

Rideracelivemx7 · Jul 31, 2013

let me rephrase that, in my test tune that makes the truck the most drivable; the idol can be a little erratic and rev up or skip here and there. my tunes that are made for the truck but are not drivable or very fun to drive in as DD use make the truck idol fantastic(as much as an OBS with 200 nozzles will I suppose)

Strokersace · Jul 31, 2013

Rideracelivemx7 said:
no I didn't feel the need to, it idols just great. sometimes it gets a little lumpy but it will eventually smooth out. its just revving or acceling it will get the skip/miss/buck is when you notice it. I sure know what a down cylinder sounds like/ idoling/reving/driving and its sure not the case here.

To each their own. Your truck your time. I know if it was me on top of my motor with the vc's off and idling, I'd take the 3 minutes to check each individual injector. Regardless that I KNOW what a dead cylinder sounds like or not. Hope you get it figured out.

lincolnlocker · Jul 31, 2013

what does the cct show whith the chip removed.. sounds more and more like a bad connection with chip or other electrical. did you wiggle all connections from the pcm to the injectors while it was running?

live life full throttle

Rideracelivemx7 · Jul 31, 2013

Strokersace said:
To each their own. Your truck your time. I know if it was me on top of my motor with the vc's off and idling, I'd take the 3 minutes to check each individual injector. Regardless that I KNOW what a dead cylinder sounds like or not. Hope you get it figured out.

Im not trying to shoot down any of your ideas, what I was getting at was if I started unplugging any injectors then it would have created a miss at idol obviously. I don't have a miss at idol so I would have no way of narrowing it down a single injector. With the skip when driving I couldn't say if its just a bad injector a couple, its just a buck like the motor is trying to cut back on fuel is from what I gathered.

I agree it almost seems to be a programming connection issue, I have messed and wiggled with every connector and wire and haven't gotten the slightest glimmer of hope from my efforts. that's why I have decided to try the injectors.