fourwd1
Moderator
Typically, that means the part is used on vehicles with a manufacturing/production date through Nov 2004.
Low fuel level and acceleration hesitations?
- Thread starter rwh963
- Start date
Typically, that means the part is used on vehicles with a manufacturing/production date through Nov 2004.
that's what i thought; then i scrolled down and it showed it fit '05-'09.
with the fuel tank topped off and the hesitation gone, i'm gong to run the tank down and determine where the hesitation starts. then i will top off again, and do the same. that will help me understand the situation a little better.
someone mentioned that the additional pressure created by a full tank is helping the pump function properly.
someone mentioned that the additional pressure created by a full tank is helping the pump function properly.
AuSeeker
Elite Member
So what price are they quoting you for the -35112 assembly, is it the $320 or $620??
UrbanRunner651
New member
$969.33... Lol
Jakeepoo3
New member
Also what wcjeep mentioned about the pump being cooler with a more full tank is also true. I didn't think about that at the time but it's another physics thing. Thermodynamics.. both these factors combined I assume are working in conjunction. If you want to see proof of where exactly the problem lies like I do, before I fix the right sh1t instead of the wrong sh!t. Rent the best scanner your parts store has that reads live stream data. This will allow you to observe the fuel pressure before and while the problem is happening.. also it may allow you to observe the output signal coming directly from the pump which will tell you if it's working properly or not.
ok, update. haven't felt a single hesitation since keeping the tank nearly full. decided to run it down until i felt the issue. right now below 1/4 full, no issue yet. could running it full have influenced the problem and contributed to it self-correcting? gonna run it down to the warning light, then do a few cycles at 1/4 full. love to not have to deal with a pump replacement.
Bluesky 07
Senior Member
Well, until it happens again. ;-) Seriously, I suppose it's possible that some kind of blockage or contaminant was present that worked itself through but who knows?
In any case, I recently had my fuel pump & sender replaced. The sender was bad but why not do the fuel pump while it's out? This post should be helpful as it describes the parts used and how the 4th Gen fuel filter works.
Jakeepoo3
New member
Service the rest of your f_ckin truck! So many things can cause acceleration issues.. your not getting a code related to this issue so service your truck. Examples- throttle body and related sensors, blow injectors out clean, check spark plugs condition/gap. Vacuum leaks. 02 and a/f sensors may need checked. PCM inputs.. at least it's working right now though
nice to have you back in the conversation!
at 200k, did this:
Replaced rear differential fluid
Replaced front differential fluid
Replaced transfer case fluid
Replaced spark plugs (OEM)
Replaced serpentine belt (OEM)
lots of other stuff later , including:
cv axle
rear brakes including calipers
cat back exhaust plus Y pipe weld
full tranny fluid change
cleaned throttle body and MAF sensor
new tires!
maybe the techron i added in April is finally working its magic......
Jakeepoo3
New member
Haha cool! After the throttle body and maf cleaning/unplugging your trucks PCM/ECU may also possibly be readjusting itself. After doing that service you're supposed to do reinitialization procedure and a/f learn procedure. But it'll relearn itself after enough driving.. maybe this is what you've been feeling..
Bluesky 07
Senior Member
My $ is on cleaning the throttle body. I'm no mechanic but it stands to reason that if the butterfly valve is sticking then moving, some kind of consequence will reflect itself in engine performance.
Jakeepoo3
New member
I agree if you cleaned it right, including the throttle plate pivots, for completely smooth action. Next time do the initialization and a/f learn procedures afterwards and drive it hard as f_ck! You won't have to deal with it relearning itself over a long period.. I do this maintenance along with all other PCM inputs every ten thousand miles. Keep her clean and computer will work clean what's next
