Truck ATAP logs.. mine looks weird??
Dec 17, 2002 | 09:26 AM
#1
Truck ATAP logs.. mine looks weird??
i logged my 98 for a few passes on the street. Reason I did so was because it sometimes sputters really bad after I let off on the gas. But every other time she runs great! anyway here goes..
LTRIMS
B1 and B2 were all around -3 to 0 crusing which is good. 0 at WOT
Timing advance: 21-19 average at WOT
B1S1:
0.91
0.805
0.04
0.03
0.03
0.03
0.03 Let off
0.89
B2S1:
0.86
0.065
0.045
0.035
0.03
0.035
0.035let off
0.865
Knock Retard
0
1
4
4
2
4
2let off
0
also on misfires: I had none under part throttle or moderate throttle. But the longer I stayed into it at WOT i started to see them on cyl 5, 6, and 7???
EX here is cyl 6:
0
0
0
0
0
44
8
8
ok what the heck is going on?? I mean shouldnt the 02's be up around .90 like my car? If so i take it she isnt getting hardly any fuel at wot? Fuel pump going bad maybe?
LTRIMS
B1 and B2 were all around -3 to 0 crusing which is good. 0 at WOT
Timing advance: 21-19 average at WOT
B1S1:
0.91
0.805
0.04
0.03
0.03
0.03
0.03 Let off
0.89
B2S1:
0.86
0.065
0.045
0.035
0.03
0.035
0.035let off
0.865
Knock Retard
0
1
4
4
2
4
2let off
0
also on misfires: I had none under part throttle or moderate throttle. But the longer I stayed into it at WOT i started to see them on cyl 5, 6, and 7???
EX here is cyl 6:
0
0
0
0
0
44
8
8
ok what the heck is going on?? I mean shouldnt the 02's be up around .90 like my car? If so i take it she isnt getting hardly any fuel at wot? Fuel pump going bad maybe?
Dec 17, 2002 | 09:33 AM
#2
Re: Truck ATAP logs.. mine looks weird??
I would be concerned about the misfires. Check your plugs and ignition system. I do think your O2s should be up near .90 like the car. It starts in the .80s then drops. Somethings wrong. I would think you would have the O2s in the 1.xxx range with misfires. Meaning more unused fuel was passing by the O2 sensors.
Dec 17, 2002 | 10:14 AM
#3
Re: Truck ATAP logs.. mine looks weird??
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by BigTex:
<strong>I would be concerned about the misfires. Check your plugs and ignition system. I do think your O2s should be up near .90 like the car. It starts in the .80s then drops. Somethings wrong. I would think you would have the O2s in the 1.xxx range with misfires. Meaning more unused fuel was passing by the O2 sensors.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I just changed my plugs about 2 weeks ago because I thought the problem was from bad plugs. I put TR-55's in there and the problem is still there. Always something to get on my nerves.. whatever it is, it mainly happens at WOT. But everynow and then i notice a little sputter(jerk) when slowly accelerating. My dad said i may need to change the fuel filter also....
ill check the wires and ingition but i dont think anything is wrong there
<strong>I would be concerned about the misfires. Check your plugs and ignition system. I do think your O2s should be up near .90 like the car. It starts in the .80s then drops. Somethings wrong. I would think you would have the O2s in the 1.xxx range with misfires. Meaning more unused fuel was passing by the O2 sensors.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I just changed my plugs about 2 weeks ago because I thought the problem was from bad plugs. I put TR-55's in there and the problem is still there. Always something to get on my nerves.. whatever it is, it mainly happens at WOT. But everynow and then i notice a little sputter(jerk) when slowly accelerating. My dad said i may need to change the fuel filter also....
ill check the wires and ingition but i dont think anything is wrong there
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