Lack of Timing Advance...Lots of KR...Slow - UPDATE 9-9-07 - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-07-2007, 09:59 PM   #11
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Quote:
Originally Posted by 1994se
I completely forgot that you're driving at everest like altitudes as well so that 3.4 isn't producing as much boost as it would if you lived in say Illinois . Maybe it does have a lot to do with the PCM and TM and whatnot. H*** 1993 SSEi is getting up to 2^ of KR stock so it'* possible.
I dont live at everest altitudes, I live at 3800 feet.This equates to 1-2PSI lost with the 3.4. Thats all. Therefore this is like running a 3.5 at moderate altitude and a 3.6 at sea level i'm guessing. I'm pushing a tad more than a 3.8 pulley at sea level. just a tad though. I garuntee if I was at sea level my car would have even less timing, which is why I know there is actually a problem.

I was able to run a 3.2 with good timing numbers and little to no KR at alititude, but even with race gas at sea level I was pushing a lot more KR.
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Old 09-08-2007, 04:59 AM   #12
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That wasn't meant to be insulting, i'm just saying i forgot you're at a higher elevation at all. Like you said yourself, if you were running that 3.4 at a lower altitude you'd have even more problems.
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Old 09-08-2007, 05:19 AM   #13
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Quote:
Originally Posted by 1994se
That wasn't meant to be insulting, i'm just saying i forgot you're at a higher elevation at all. Like you said yourself, if you were running that 3.4 at a lower altitude you'd have even more problems.
I never said you were being insulting...If my reply came off that way I apologize.

I'm reseting the PCM overnight to see what happens, I reset it before I changed the fuel filter, but it was impossible to blow air thru, completely plugged. Did I mention how much I hate michigans transportation department? Its an 01 and the line is already rusted out bad. PB blaster over 10 times to get the bugger off. I just got done re-inspecting all the vaccum lines in the engine bay and they appear to be fine.

I'm thinking of these possiblitys:

Cat Converter is plugged slightly, 00+ seem to have more problems with cats dying than 92-99s it seems.
Fuel Injector(*) Not working right - Perhaps one of my fuel injectors is not working right, If one cylinder is lean it will cause KR across the board. However I'm not sure its worth the cost of flowmatching or just upgrade to 42.5LB injectors..hmm....
Fuel Pump Failing Under Load While I cannot test the "under load" pressure of the fuel pump, my 93 had the similar issue with KR when the fuel pump had fine PSI at idle and reving it but under load it would crap out.
PCM is significantly different in the 00+ Versus the 97-99. Perhaps it has different torque managment specs that it feels it needs to pull back timing automatically to protect the transmission. Maybe the fuel tables and other information is different on the PCM, I cant get a straight answer from anyone.
2000'* Exhaust Perhaps the 97-99 Exhaust is more free-flowing than the 00+, too much backpressure = less power. That would be hard to believe though.

It was 60* outside tonight. Same KR, 7* of timing in 2nd gear with a couple degrees of KR, it seemed like the "starting point" for the KR was around 9.5* meaning, that instead of 15 or so my maximum timing in 2nd was 9.5.
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Old 09-08-2007, 11:45 AM   #14
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Quote:
Fuel Injector(*) Not working right - Perhaps one of my fuel injectors is not working right, If one cylinder is lean it will cause KR across the board. However I'm not sure its worth the cost of flowmatching or just upgrade to 42.5LB injectors..hmm....
One running RICH would be worse. The PCM will lean out the other 5 to compensate.

42.5lb injectors would also make it worse. That'* the last thing your car needs right now. You aren't even remotely close to needing those. And in your current situation, they will make it worse.
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Old 09-09-2007, 06:21 PM   #15
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OK, I've determined part of the issue with the KR.

When the engine is under 160*, i get full timing and no KR all the way up

After some work with the Aeroforce I found some disburbing numbers on the other parameters.

The Coolant temp on this car is in the dangerous range, While the fans dont kick on and the indash gauge never gets over 200* the Aeroforce gauge reads 220-230 at idle. My other car matched the in dash gauge perfectly. Once the in-dah gauge gets in the 210-220 range, the fans kick on.

However it is not across the board, When the car is moving both the in-dash and aeroforce will match pretty close to eachother. However under inclines, the car gets way to hot, too fast.

The DEXcool is still in the system and my next mod is going to be to flush the dex along with the dex sand out of the system and if that does not fix it, replace the radiator. It has a huge crack in it anyway, not leaking but it still is very close to breaking.

The only issue is the OEM radiator is OVER $400
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Old 09-09-2007, 07:30 PM   #16
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You Radiator is very thin... Its a shame they used a radiator as such on every SSEi 1996 on up... Its a very thin core..

also check to see that the radiator is not plugged with dirt..

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Old 09-09-2007, 07:50 PM   #17
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Replace the rad core with a thicker one. Take it to a radiator specialty shop and get an estimate.

Heat has much to do with it.
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Old 09-09-2007, 11:03 PM   #18
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pull a wheel speed sensor and see if that helps your KR.
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Old 09-10-2007, 12:34 AM   #19
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I could see if he was spinning his tires but is there any other reason for pulling the sensor.
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Old 09-10-2007, 03:43 AM   #20
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Quote:
Originally Posted by Rogue
pull a wheel speed sensor and see if that helps your KR.
This makes no difference whatsoever.
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