Help

[jerryjoe28]

ok guys 2 weeks ago my hoe started acting funny. when u first start it up (almost every time) the truck is VERY sluggish. almost like its not getting gas. put a gauge on it and the fuel PSI was in the low 50s . figured my pup was going bad, so I replaced the fuel pump ( dealer part ) and a fuel filter ( wix ). PSI came back up in rage so I assumed problem solved. WRONG!! got in it this morning and right back to no power. after u drive it things seem normal. go to lunch today same prob. I have sense let it sit and idle for a bit before taking off. any one have any ideas on what else I need to check out?

 

[Big Buttons]

Might be an injector?

 

[Nickn]

Is it throwing any codes? How is idle when first started (smooth/choppy/too high or low)

 

[jerryjoe28]

No codes, when u first start it it idles fine no problems until u start moving

 

[God]

Dirty MAF?

 

[Jerky Arm Ape]

Dirty MAF?

I agree with this. Dirty mass air flow?

Something isn't operating correctly but is still operational since it hasn't produced a code or the SES light isn't on.
Which means something may be dirty or out of calibration so to speak, by that I mean it still works but it isn't reading right.

If it were mine I'd check any sensor that effected the fuel mixture.
Your air is controlled by the accelerator cable so the computer has to mix the fuel to the amount of air intake.

Check and clean the mass air flow/ whole intake system if anything is dirty in there.
The MAF as well.
Um... Both 02 sensors that are inline before the catalytic converters

Maybe even the fuel PSI.
When I change my oil, I buy a can of seafoam and put it in my tank, and fill my tank up when I'm done.

 

[jerryjoe28]

I cleaned the MAF sunday night... no change. any way to test and see if its going bad? both O2 sensors where replaced in march so I doubt that is the problem. any other ideas?

 

[SunlitComet]

you need a scanner to test it properly.

 

[jerryjoe28]

I have access to a snap on solus ultra

 

[SunlitComet]

at idle you should 4-7 g/s at wide open throttle you should get 100 g/s or at the time you have the 1-2 shift. of course you should have a smooth increase as the engine rpm goes up.

 

[jerryjoe28]

thanks I will try to get away from the office some time today and check that out.

 

[jerryjoe28]

ok put the truck on a scanner last tue. it had a test processes (same thing you said sunlit) to run the truck trough. I ran the test and the results came back "in spec" so I have been racking my brain trying to figure it out. yesterday I decided to swap my maf with one on my buddies truck. Low and behold problem was gone! bought a new on this morning and slapped her on! I guess the thing was just on its way out but not bad yet but either way glad I got the thing fixed!