Got a slight miss, got numbers

[Dhos1]

Ive developed a slight miss. Take a look at my #'s please and see if anything jumps out at you please.
O2-789-804
AF 05
L8 38
Batt 13.4
INT 128
BL 118
CLT 203
ATS 140
R 875
TPS .40
IAC 35
CC 37
MAL 0

These are after about 5-8 mins of run time, warm-up. Recently changed plugs to CR43 From Autolite 24's and changed wires. Car runs great, but i can hear a slight stumble or miss at idle. Anything jump out at you guys????

 

[3-5.0]

I don't have my spec chart here but TPS ?.

 

[whitehot1]

Ive developed a slight miss. Take a look at my #'s please and see if anything jumps out at you please.
O2-789-804
AF 05
L8 38
Batt 13.4
INT 128
BL 118
CLT 203
ATS 140
R 875
TPS .40
IAC 35
CC 37
MAL 0

These are after about 5-8 mins of run time, warm-up. Recently changed plugs to CR43 From Autolite 24's and changed wires. Car runs great, but i can hear a slight stumble or miss at idle. Anything jump out at you guys????

Coolant temp 203 degrees after 5 -8 minutes run time doesn't sound right.

 

[getdowngranny]

203 is a bit different for just 5-8 minutes of idle time. How fast are your cross counts moving? When was the last time your o2 sensor was changed out and what brand is it? What injectors and chip? What is your fuel pressure set at?


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[hotairgnx548]

Ive developed a slight miss. Take a look at my #'s please and see if anything jumps out at you please.
O2-789-804
AF 05
L8 38
Batt 13.4
INT 128
BL 118
CLT 203
ATS 140
R 875
TPS .40
IAC 35
CC 37
MAL 0

These are after about 5-8 mins of run time, warm-up. Recently changed plugs to CR43 From Autolite 24's and changed wires. Car runs great, but i can hear a slight stumble or miss at idle. Anything jump out at you guys????

Is that a typo on the BL numbers? John

 

[Dhos1]

60 lbs injectors plus chip from TT, FP set at 45...o2 sensor change about 2 yrs ago when I first brought the car...auto zone brand. Te44, FMIC, Hotwire...everything its supposed to have. SMC Alky single nozzle..

New numbers after 5 mins

O2 644
AF 07
L8 42
BAT 13.5
INT 128
BL 118
CLT 160
ATS 87
RPM 875
TPS .40
IAC 44
CC 79
NAL 0

 

[getdowngranny]

The blm's are a bit low but I don't see that causing a miss issue. What do the blm's look like while cruising? What MAF do you have? I had issues with cheap o2 sensors in the past but I have never used the autozone brand. I use a NTK o2 sensor without issue. Do you have another MAF you can throw on there to troubleshoot? One of the local guys had an idle issue and it ended up being a bad stock MAF.


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[whitehot1]

60 lbs injectors plus chip from TT, FP set at 45...o2 sensor change about 2 yrs ago when I first brought the car...auto zone brand. Te44, FMIC, Hotwire...everything its supposed to have. SMC Alky single nozzle..

New numbers after 5 mins

O2 644
AF 07
L8 42
BAT 13.5
INT 128
BL 118
CLT 160
ATS 87
RPM 875
TPS .40
IAC 44
CC 79
NAL 0

The best o2 sensor i have found to work the best and last the longest is the Denso brand. Rockauto has the best price i have found for them at just under $14.00 shipped to me. Here is a link to rockauto and info for the Denso o2 sensor.

https://www.rockauto.com/catalog/moreinfo.php?pk=991921&cc=1379820&jnid=459&jpid=0

 

[Dhos1]

Im thinking i may do the o2 sensor from the start, thanks for the link. Maybe its bad causing something to go awry and the miss. I am also going to go back to my Autolite 24's with the 32 gap and see how she acts.

 

[getdowngranny]

Im thinking i may do the o2 sensor from the start, thanks for the link. Maybe its bad causing something to go awry and the miss. I am also going to go back to my Autolite 24's with the 32 gap and see how she acts.

Try some NGK YR5 plugs gapped at 28-30 and see if your car likes them better.


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[GNRick]

Try turning your iac down to 15-20 range.

 

[MauDeuce50]

the miss developed right after you changed your spark plugs?

 

[whitehot1]

What brand of plug wires did you install?

Were the old plug wires bad or did you just want new ones and went with another brand ?

 

[Dhos1]

I had some oreillys plug wires in it. Then i brought a nice pair of Taylor Spiro pro race wires

 

[Dhos1]

It is just ever so slight....i may go back to the Autolite 24's. I never had it until i went to the 43's gapped at 32. Im running around 20# or so with an SMC kit, with zero detonation, but I do not push it and stay in it. I will say that the cooler weather she runs like a raped ape.

 

[bison]

If you had no problem before changing plugs then
that's exactly where I'd be looking. Maybe a a cracked plug or somehow the gap is closed to almost nothing?


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[Dhos1]

Yeah, that will be my 1st point that I will address