Why is ECT perfectly flatlined at 153°F...?
Why is ECT perfectly flatlined at 153°F...?
In LS1B_0003.efi your TP only goes as high as 31%... how far did you perceive you were opening the throttle...?
On your pid list, You have egr voltage. Is this for fuel pressure? How are you converting that to psi? Sorry if its a dumb question.,
Last edited by slows10; June 4th, 2011 at 07:24 AM. Reason: spelling
1997 S10, 06 trailblazer SS LS2 swap, 4L70E trans, 76mm turbo. Factory ZQ8 suspension. 3.08, G80 w/a zexel. With a 0411 swap.
See CALC.FP in the attachment to post #362 above.Originally Posted by slows10
No, I haven't verified the current rail psi of 65, but when I had a pressure gauge a few weeks back the sensor and guage where equal. At that time the rail pressure was around 56 psi, but the fuel pump was clogged and whining. Everysince I unclogged the fuel pump and add a new sock the psi has read 65. I don't believe I have a in-tank regulator, the corvette fuel filter I have is supose to regulate the pressure to 55 psi.
Slows10,
I would definitely have to agree with you. The only thing that changed was the temps outside and then later that night I took my son out to see X-men and the car ran great again.
In the pic the ETC was flatlined at 153* because the engine was still cold and warming up. The car hadn't been driven in 8 hours.
That's about right, I wasn't driving it hard, because I wasn't confident it wouldn't lean out. Plus it doesn't take much to get this sucker moving.
slows10 has a good/interesting point...
GJ, can you post closeup pics of your fuel line...?
Ok, guys I got a couple of pics as well as a few logs made. Ok, first here are my logs. The 1st was the ride to work this morning, nice outside probably around 75*.
LS1B_0007.efi
The second log was on my lunch break and was total crap again. Car was cold, but still leaning out like crazy it was around 100* outside.
LS1B_0008.efi
The last log was the drive home from work, still leaning out and around 96* outside. One thing I noticed while reviewing the log was one of the LTFT's keeps pegging out at positive 25 for some reason. It looks like it does it intermittently through the 1st log, but by the last 2 logs it's consistent.
LS1B_0009.efi
Ok, now pics of my engine bay and fuel lines.
I think the HO2 response is showing a malfunction in the sensor(s) or in some internal working of the engine. Of course exhaust leak comes to mind..especially when seeing a +25 LTFT.
Your O2's should show a nice rhythmic swing from rich to lean at a rate of 3-5 times a second. Your does not.
Heat alone should not be doing that. I ran my car today with high IATS and saw nothing like your O2 pattern. I would say, replace sensors, check for exhaust leaks..whether fuel pressure alone can cause that is beyond my area of knowledge..
I wonder if that MAF/IAT location is hurting you?
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